feat(systemd): Add revpi-iosbus.service files

Signed-off-by: Sven Sager <s.sager@kunbus.com>

.gitignore

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH <support@kunbus.com>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]

.gitlab-ci.yml

@@ -0,0 +1,40 @@
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH <support@kunbus.com>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+default:
+  tags:
+    - self-hosted
+    - host-arm64
+    - high-perf
+
+include:
+  - project: "revolutionpi/infrastructure/ci-templates"
+    file: "base.yml"
+  - project: "revolutionpi/infrastructure/ci-templates"
+    file: "check-commit/lint-commit.yml"
+  - project: "revolutionpi/infrastructure/ci-templates"
+    file: "reuse-lint.yml"
+  - project: "revolutionpi/infrastructure/ci-templates"
+    file: "package-devel.yml"
+  - local: debian/gitlab-ci.yml
+    rules:
+      - exists:
+          - debian/gitlab-ci.yml
+
+run_tests:
+  stage: test
+  image: python:3.11-bookworm
+  script:
+    - apt-get update
+    - apt-get -y install dbus libgirepository1.0-dev
+    - dbus-uuidgen --ensure=/etc/machine-id
+    - pip install -r requirements.txt
+    - PYTHONPATH=src dbus-run-session -- pytest -v --junitxml=report.xml --cov=src --cov-report term --cov-report xml:coverage.xml
+  coverage: '/(?i)total.*? (100(?:\.0+)?\%|[1-9]?\d(?:\.\d+)?\%)$/'
+  artifacts:
+    reports:
+      junit: ${CI_PROJECT_DIR}/report.xml
+      coverage_report:
+        coverage_format: cobertura
+        path: coverage.xml

MANIFEST.in

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH <support@kunbus.com>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 recursive-include .reuse *
 recursive-include data *
 recursive-include LICENSES *

Makefile

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH <support@kunbus.com>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 SHELL        := bash
 MAKEFLAGS     = --no-print-directory --no-builtin-rules
 .DEFAULT_GOAL = all

README.md

@@ -1,3 +1,14 @@
+<!--
+SPDX-FileCopyrightText: 2025 KUNBUS GmbH <support@kunbus.com>
+
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
 # Middleware for Revolution Pi
 
 This middleware will support D-Bus as IPC interface.
+
+## D-Bus
+
+See [docs/dbus.md](docs/dbus.md) for an overview of the standard D-Bus data
+types.

data/dbus-policy/com.revolutionpi.ios1.conf

@@ -0,0 +1,19 @@
+<!-- /usr/share/dbus-1/system.d/com.revolutionpi.ios1.conf -->
+<busconfig>
+    <!-- Allow full access to root as the bus owner -->
+    <policy user="root">
+        <allow own="com.revolutionpi.ios1"/>
+        <allow send_destination="com.revolutionpi.ios1"/>
+        <allow receive_sender="com.revolutionpi.ios1"/>
+    </policy>
+
+    <!-- System group picontrol -->
+    <policy group="picontrol">
+        <allow send_destination="com.revolutionpi.ios1"/>
+    </policy>
+
+    <!-- Standard-Policy -->
+    <policy context="default">
+        <deny send_destination="com.revolutionpi.ios1"/>
+    </policy>
+</busconfig>

data/etc/default/revpi-ios

@@ -0,0 +1,8 @@
+# Additional options that are passed to revpi-ios.
+#   add '-f /var/log/revpi-ios.log' to write logs to own log file
+#   add '-v' or '-vv' for verbose logging
+
+DAEMON_OPTS=""
+
+# In addition to journalctl, use your own additional log file
+# DAEMON_OPTS="-f /var/log/revpi-ios.log"

data/etc/logrotate/revpi-ios

@@ -0,0 +1,14 @@
+/var/log/revpi-ios.log
+{
+    rotate 6
+    weekly
+    maxsize 1M
+    compress
+    delaycompress
+    missingok
+    notifempty
+    sharedscripts
+    postrotate
+        systemctl kill --signal=SIGUSR1 revpi-ios > /dev/null 2>&1 || true
+    endscript
+}

data/examples/io_controller.py

@@ -0,0 +1,65 @@
+# -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+"""Switches 14 outputs on a DIO to the same value as the first input."""
+
+from time import perf_counter
+
+from gi.repository import GLib
+from pydbus import SystemBus
+
+detected_signal = False
+timestamp = perf_counter()
+
+# Get system bus
+bus = SystemBus()
+
+# Get IoManager interface on ios1 bus
+iface_io_manager = bus.get(
+    "com.revolutionpi.ios1",
+    "/com/revolutionpi/ios1",
+)["com.revolutionpi.ios1.IoManager"]
+
+# Query object path of RevPiLED output
+path_revpi_led = iface_io_manager.Get("RevPiLED")
+
+# Get Output interface in the queried object path.
+out_RevPiLED = bus.get("com.revolutionpi.ios1", path_revpi_led)["com.revolutionpi.ios1.Output"]
+
+# Get all 14 outputs
+lst_path_outputs = [iface_io_manager.Get(f"O_{i}") for i in range(1, 15)]
+lst_out_outputs = [
+    bus.get("com.revolutionpi.ios1", path)["com.revolutionpi.ios1.Output"]
+    for path in lst_path_outputs
+]
+
+
+def signal_handler(io_name, io_value):
+    global timestamp
+
+    print(f"Signal received: {io_name} = {io_value}")
+
+    if io_name == "O_14":
+        print(f"Time since input detection: {perf_counter() - timestamp}")
+
+    elif io_name == "I_1":
+        timestamp = perf_counter()
+
+        out_RevPiLED.SetValue(GLib.Variant("i", io_value))
+        for output in lst_out_outputs:
+            output.SetValue(GLib.Variant("b", io_value))
+
+
+# Start change detection to fire signals on dbus
+iface_io_manager.ActivateIoSignals()
+
+iface_io_manager.onIoChanged = signal_handler
+
+try:
+    loop = GLib.MainLoop()
+    loop.run()
+except KeyboardInterrupt:
+    pass
+
+# Stop change detection
+iface_io_manager.DeactivateIoSignals()

data/systemd/before_253/revpi-ios.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=D-Bus interface for Inputs/Outputs of Revolution Pi
+
+[Service]
+EnvironmentFile=-/etc/default/revpi-ios
+Type=notify
+NotifyAccess=all
+ExecStart=/usr/sbin/revpi-middleware ios $DAEMON_OPTS
+ExecReload=/bin/kill -HUP $MAINPID
+
+[Install]
+WantedBy=multi-user.target

data/systemd/from_253/revpi-ios.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=D-Bus interface for Inputs/Outputs of Revolution Pi
+
+[Service]
+EnvironmentFile=-/etc/default/revpi-ios
+Type=notify-reload
+NotifyAccess=all
+ExecStart=/usr/sbin/revpi-middleware ios $DAEMON_OPTS
+
+[Install]
+WantedBy=multi-user.target

debian/changelog

@@ -1,96 +0,0 @@
-revpi-middleware (0.0.5-1+deb12+1) bookworm; urgency=medium
-
-  * fix(revpiconfig): Ensure systemd reloads after unit changes
-  * feat(revpiconfig): Make unit config changes asynchronous
-  * Update changelog for 0.0.4-1+deb12+1 release
-
- -- Sven Sager <s.sager@kunbus.com>  Tue, 22 Apr 2025 13:44:45 +0200
-
-revpi-middleware (0.0.4-1+deb12+1) bookworm; urgency=medium
-
-  * fix(dbus): Update DBus policy file path and interface name
-  * fix(dbus): Update systemd interface and path handling
-  * doc(revpiconfig): Add detailed docstrings to ConfigTxt methods
-  * doc(revpiconfig): Add docstrings to `RevPiConfig` class and methods
-  * doc(revpiconfig): Add docstrings to enums in `revpi_config.py`
-  * doc(revpiconfig): Docstrings for `get_rfkill_index` and `simple_systemd`
-
- -- Sven Sager <s.sager@kunbus.com>  Tue, 22 Apr 2025 13:43:53 +0200
-
-revpi-middleware (0.0.3-1+deb12+1) bookworm; urgency=medium
-
-  * refactor: Update interface name from 'picontrol' to 'PiControl'
-  * feat(dbus): Add `grep` function to search for patterns in a file
-  * fix(cli): Change absolute imports to relative imports
-  * feat(dbus): Add D-Bus interface for system configuration in middleware
-  * feat(dbus): Add GUI configuration handling to interface_config.py
-  * feat(revpiconfig): Add RevPiConfig class for device information handling
-  * refactor(dbus): Move system configuration methods to revpi_config.py
-  * feat(dbus): Remove 'var-log.mount' feature
-  * feat(dbus): Add avahi-daemon configuration to system services
-  * feat(dbus): Add dphys-swapfile configuration functionality
-  * feat(revpiconfig): Add ConfigTxt class for managing config.txt file
-  * feat(dbus): Add support for configuring the external antenna
-  * feat(dbus): Add support for configuring 'revpi-con-can' feature
-  * feat(revpiconfig): Enhance Wi-Fi detection and add rfkill index support
-  * feat(dbus): Add Wi-Fi configuration support to the system config
-  * refactor(revpiconfig: Change Wi-Fi detection and rfkill index logic
-  * feat(dbus): Add Bluetooth configuration functionality
-  * feat(dbus): Add InterfaceRevpiConfig to DBus interfaces list
-  * feat(cli): Add `get_properties` helper function for DBus interactions
-  * feat(cli): Add CLI command for configuring Revpi features
-  * feat(cli): Add CLI support for RevPi configuration object (revpi-config)
-  * feat(revpiconfig): Replace rfkill subprocess calls with sysfs writes
-  * refactor: Rename WiFi to WLAN for consistent terminology
-  * feat(deb): Add dependencies for `dtoverlay` command
-
- -- Sven Sager <s.sager@kunbus.com>  Mon, 21 Apr 2025 13:44:18 +0200
-
-revpi-middleware (0.0.2-1+deb12+1) bookworm; urgency=medium
-
-  * refactor(dbus): Move D-Bus helper functions to a dedicated file
-  * refactor(dbus): Move ResetDriverWatchdog to process_image_helper.py
-  * refactor(dbus): Parameterize `picontrol_device` and `config_rsc`
-  * feat: Add session bus option for local testing and development
-  * feat(dbus): Add import for BusProvider in dbus_middleware1 module
-  * feat(dbus): Add `running` property to `BusProvider`
-  * refactor(cli): D-Bus helpers support session and system bus types
-  * fix(dbus): Add error handling for DBus publishing and main loop
-  * refactor(dbus): piControl driver reset with PiControlIoctl class
-  * test(dbus): Add unit test framework for dbus_middleware1 module
-  * test(dbus): Add unit tests for PiControl D-Bus interface
-  * refactor(dbus): Fix typo and remove unused thread instance
-  * refactor(dbus): D-Bus interface management with cleanup support.
-  * test(dbus): Add support for testing driver reset notification
-  * feat(deb): Add dbus for testing to build dependencies
-  * fix(deb): Skip tests because of missing SystemBus in build container
-
- -- Sven Sager <s.sager@kunbus.com>  Sat, 19 Apr 2025 16:34:20 +0200
-
-revpi-middleware (0.0.1-1+deb12+1) bookworm; urgency=medium
-
-  * docs: Start git project with python git-ignore and Readme
-  * docs: Use 'reuse' for SPDX Headers and Licenses
-  * feat: Add python base project files
-  * feat: Add proginit application basic module
-  * feat: Add the data directory for additional data files for the project
-  * test: Add tests directory with a dummy test
-  * build: Add all necessary files for the build system
-  * feat: Add dummy main application script
-  * feat: Add systemd file and data to integrate the app as a daemon
-  * chore: Update proginit to 1.4.0
-  * feat(dbus): Add ResetDriverWatchdog helper as global dbus helper
-  * feat(process_image): Add D-Bus interface for piControl driver
-  * feat(dbus): Add initial D-Bus middleware implementation
-  * feat(dbus): Add `extend_interface` function for dynamic interface naming
-  * feat(dbus): Add DBus policy configuration for revpi-middleware
-  * feat: Add MiddlewareDaemon implementation to revpi-middleware
-  * feat: Add daemon mode and signal handling to main application
-  * feat(cli): Add D-Bus helper functions for CLI commands.
-  * feat(cli): Add await_signal function to handle D-Bus signals
-  * feat(cli): Add `await-reset` to wait for piControl reset signal
-  * chore(build): Update requirements for this project
-  * feat(cli): Add new CLI tool entry point for `revpictl`
-  * feat(deb): Start packaging branch
-
- -- Sven Sager <s.sager@kunbus.com>  Fri, 18 Apr 2025 19:02:20 +0200

debian/control

@@ -1,39 +0,0 @@
-Source: revpi-middleware
-Section: python
-Priority: optional
-Maintainer: KUNBUS GmbH <support@kunbus.com>
-Rules-Requires-Root: no
-Homepage: https://revolutionpi.com/
-Vcs-Browser: https://gitlab.com/revolutionpi/revpi-middleware
-Vcs-Git: https://gitlab.com/revolutionpi/revpi-middleware.git -b debian/bookworm
-Build-Depends:
-  dbus,
-  dbus-x11,
-  debhelper-compat (= 13),
-  dh-python,
-  python3-all,
-  python3-gi (>= 3.42.2),
-  python3-pydbus (>= 0.6.0),
-  python3-setuptools,
-Standards-Version: 4.6.2
-
-Package: revpi-middleware
-Architecture: all
-Pre-Depends: ${misc:Pre-Depends}
-Depends:
-  raspi-utils-dt | libraspberrypi-bin,
-  ${python3:Depends},
-  ${misc:Depends}
-Description: Revolution Pi middleware with D-Bus interface
- The Revolution Pi middleware provides a robust communication interface for
- Revolution Pi industrial computers. It enables seamless integration between
- hardware components and applications through a D-Bus interface. The middleware
- serves as a bridge for data exchange, device configuration, and system
- monitoring.
- .
- Key features:
-  * Hardware abstraction layer for Revolution Pi I/O modules
-  * Real-time data processing and event handling
-  * Simplified API for accessing Revolution Pi hardware features
-  * Extensive configuration options for industrial automation tasks
-  * Built-in monitoring and diagnostic capabilities

debian/copyright

@@ -1,27 +0,0 @@
-Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Source: https://gitlab.com/revolutionpi/opcua-revpi-server
-
-Files: *
-Copyright: 2025 KUNBUS GmbH
-License: GPL-2+
-
-Files: debian/*
-Copyright: 2025 KUNBUS GmbH
-License: GPL-2+
-
-License: GPL-2+
- This package is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- .
- This package is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- GNU General Public License for more details.
- .
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <https://www.gnu.org/licenses/>
- .
- On Debian systems, the complete text of the GNU General
- Public License version 2 can be found in "/usr/share/common-licenses/GPL-2".

debian/gbp.conf

@@ -1,7 +0,0 @@
-[DEFAULT]
-upstream-branch = main
-upstream-tag = v%(version)s
-debian-branch=debian/bookworm
-debian-tag = debian/%(version)s
-debian-tag-msg = %(pkg)s Debian release %(version)s
-pristine-tar = True

debian/revpi-middleware.install

@@ -1,4 +0,0 @@
-data/dbus-policy/com.revolutionpi.middleware1.conf      /usr/share/dbus-1/system.d
-data/etc/default/revpi-middleware                       /etc/default/
-data/etc/revpi-middleware/revpi-middleware.conf         /etc/revpi-middleware/
-data/systemd/before_253/revpi-middleware.service        /lib/systemd/system/

debian/revpi-middleware.links

@@ -1,2 +0,0 @@
-/usr/share/revpi-middleware/revpi-middleware	/usr/sbin/revpi-middleware
-/usr/share/revpi-middleware/revpicli	/usr/bin/revpicli

debian/rules

@@ -1,12 +0,0 @@
-#!/usr/bin/make -f
-
-export PYBUILD_NAME=revpi-middleware
-export PYBUILD_INSTALL_ARGS=--install-lib=/usr/share/$(PYBUILD_NAME)/ --install-scripts=/usr/share/$(PYBUILD_NAME)/
-
-%:
-	dh $@ --with python3 --buildsystem=pybuild
-
-override_dh_auto_test:
-	# Currently, the tests have to be skipped, because no SystemBus is
-	# available in the Docker container.
-	@echo "Skipped tests"

debian/source/format

@@ -1 +0,0 @@
-3.0 (quilt)

docs/dbus.md

@@ -0,0 +1,51 @@
+<!--
+SPDX-FileCopyrightText: 2026 KUNBUS GmbH <support@kunbus.com>
+
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
+# D-Bus
+
+## Datentypen
+
+Hier ist eine **Liste der standardisierten D‑Bus-Datentypen** (Signaturen), wie
+sie u. a. in Introspection/XML (`type="..."`) verwendet werden.
+
+## Basis-Typen (Basic Types)
+
+| Signatur | Bedeutung                           |
+|----------|-------------------------------------|
+| `y`      | Byte (unsigned 8-bit)               |
+| `b`      | Boolean                             |
+| `n`      | Int16 (signed)                      |
+| `q`      | UInt16 (unsigned)                   |
+| `i`      | Int32 (signed)                      |
+| `u`      | UInt32 (unsigned)                   |
+| `x`      | Int64 (signed)                      |
+| `t`      | UInt64 (unsigned)                   |
+| `d`      | Double (IEEE 754)                   |
+| `s`      | String (UTF‑8)                      |
+| `o`      | Object Path                         |
+| `g`      | Signature (Typ-Signatur als String) |
+
+## Container-Typen (Compound/Container)
+
+| Form       | Bedeutung                                       | Beispiel                        |
+|------------|-------------------------------------------------|---------------------------------|
+| `aX`       | Array von `X`                                   | `as` = Array von Strings        |
+| `(XYZ...)` | Struct/Tupel                                    | `(is)` = (Int32, String)        |
+| `{KV}`     | Dict-Entry (nur innerhalb eines Arrays erlaubt) | `a{sv}` = Dict String → Variant |
+
+## Spezial-Typ
+
+| Signatur | Bedeutung                                         |
+|----------|---------------------------------------------------|
+| `v`      | Variant (beliebiger Typ, zur Laufzeit festgelegt) |
+
+## Häufig genutzte Kombis (Praxis)
+
+- `as` → Liste von Strings
+- `ao` → Liste von Object Paths
+- `a{sv}` → „Properties“-Map (String → Variant), sehr verbreitet bei
+  `org.freedesktop.DBus.Properties`
+- `a{ss}` → String → String Map

examples/revpi-config

@@ -0,0 +1,100 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+from argparse import ArgumentParser, SUPPRESS
+from typing import NamedTuple
+
+from pydbus import SessionBus, SystemBus
+
+FeatureMapping = NamedTuple("FeatureMapping", [("dbus_interface", str), ("name", str)])
+
+REVPI_DBUS_NAME = "com.revolutionpi.middleware1"
+REVPI_DBUS_BASE_PATH = "/com/revolutionpi/middleware1"
+IFACE_SOFTWARE_SERVICES = "com.revolutionpi.middleware1.SoftwareServices"
+IFACE_REVPI_CONFIG = "com.revolutionpi.middleware1.RevpiConfig"
+
+REVPI_FEATURE_MAPPINGS = {
+    "gui": FeatureMapping(IFACE_REVPI_CONFIG, "gui"),
+    "revpi-con-can": FeatureMapping(IFACE_REVPI_CONFIG, "revpi-con-can"),
+    "dphys-swapfile": FeatureMapping(IFACE_REVPI_CONFIG, "swapfile"),
+    "pimodbus-master": FeatureMapping(IFACE_SOFTWARE_SERVICES, "pimodbus-master"),
+    "pimodbus-slave": FeatureMapping(IFACE_SOFTWARE_SERVICES, "pimodbus-slave"),
+    "systemd-timesyncd": FeatureMapping(IFACE_SOFTWARE_SERVICES, "ntp"),
+    "ssh": FeatureMapping(IFACE_SOFTWARE_SERVICES, "ssh"),
+    "nodered": FeatureMapping(IFACE_SOFTWARE_SERVICES, "nodered"),
+    "noderedrevpinodes-server": FeatureMapping(IFACE_SOFTWARE_SERVICES, "noderedrevpinodes-server"),
+    "revpipyload": FeatureMapping(IFACE_SOFTWARE_SERVICES, "revpipyload"),
+    "bluetooth": FeatureMapping(IFACE_REVPI_CONFIG, "bluetooth"),
+    "ieee80211": FeatureMapping(IFACE_REVPI_CONFIG, "wlan"),
+    "avahi": FeatureMapping(IFACE_SOFTWARE_SERVICES, "avahi"),
+    "external-antenna": FeatureMapping(IFACE_REVPI_CONFIG, "external-antenna"),
+}
+
+# Generate command arguments
+parser = ArgumentParser(
+    prog="revpi-config",
+    description="Configuration tool for Revolution Pi.",
+)
+parser.add_argument(
+    "--use-session-bus",
+    dest="use_session_bus",
+    action="store_true",
+    default=False,
+    help=SUPPRESS,
+)
+parser.add_argument(
+    "action",
+    choices=["enable", "disable", "status", "available", "availstat"],
+    help="Action to be executed: enable, disable, status or available.",
+)
+parser.add_argument(
+    "feature",
+    nargs="*",
+    help="Name of the feature to configure.",
+)
+args = parser.parse_args()
+
+# Init dbus
+bus = SessionBus() if args.use_session_bus else SystemBus()
+revpi_middleware = bus.get(REVPI_DBUS_NAME, REVPI_DBUS_BASE_PATH)
+
+lst_results = []
+for feature in args.feature:
+
+    # Get the mappings
+    feature_mapping = REVPI_FEATURE_MAPPINGS.get(feature, None)
+
+    if feature_mapping is None:
+        if args.action in ("enable", "disable"):
+            # Missing feature with action enable/disable will return 5
+            lst_results.append(5)
+        elif args.action == "availstat":
+            # Missing feature with action availstat will return 2
+            lst_results.append(2)
+        else:
+            # Missing feature with action status/available will return 0
+            lst_results.append(0)
+
+        continue
+
+    dbus_interface = revpi_middleware[feature_mapping.dbus_interface]
+
+    if args.action == "enable":
+        dbus_interface.Enable(feature_mapping.name)
+        lst_results.append(0)
+
+    elif args.action == "disable":
+        dbus_interface.Disable(feature_mapping.name)
+        lst_results.append(0)
+
+    elif args.action in ("status", "availstat"):
+        status = dbus_interface.GetStatus(feature_mapping.name)
+        lst_results.append(int(status))
+
+    elif args.action == "available":
+        availability = dbus_interface.GetAvailability(feature_mapping.name)
+        lst_results.append(int(availability))
+
+if lst_results:
+    print(" ".join(map(str, lst_results)))

pyproject.toml

@@ -1,2 +1,6 @@
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH <support@kunbus.com>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 [tool.black]
 line-length = 100

requirements.txt

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH <support@kunbus.com>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Build dependencies
 pip-licenses
 Pyinstaller

src/revpi_middleware/__about__.py

@@ -2,6 +2,7 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """Metadata of package."""
+
 __author__ = "Sven Sager"
 __copyright__ = "Copyright (C) 2025 KUNBUS GmbH"
 __license__ = " GPL-2.0-or-later"

src/revpi_middleware/__init__.py

@@ -2,4 +2,5 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """Package: revpi_middleware."""
+
 from .__about__ import __author__, __copyright__, __license__, __version__

src/revpi_middleware/cli_commands/__init__.py

@@ -2,4 +2,5 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """CLI commands to control revpi_middleware."""
+
 from ..__about__ import __author__, __copyright__, __license__, __version__

src/revpi_middleware/cli_commands/cli_base.py

@@ -5,6 +5,7 @@
 This module provides the foundation for the RevPi middleware CLI commands
 and argument parsing setup.
 """
+
 from logging import getLogger
 
 from . import cli_config, cli_picontrol

src/revpi_middleware/cli_commands/cli_config.py

@@ -1,6 +1,7 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """Command-Line for the picontrol object of CLI."""
+
 from argparse import ArgumentParser
 from logging import getLogger
 

src/revpi_middleware/cli_commands/cli_picontrol.py

@@ -1,6 +1,7 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """Command-Line for the picontrol object of CLI."""
+
 from argparse import ArgumentParser
 from logging import getLogger
 

src/revpi_middleware/cli_commands/dbus_helper.py

@@ -1,6 +1,7 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """D-Bus helper functions for cli commands."""
+
 from enum import Enum
 from threading import Thread
 from time import sleep

src/revpi_middleware/daemon.py

@@ -3,29 +3,43 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 """Main daemon of revpi-middleware."""
 
+from enum import Enum
 from logging import getLogger
+from os import environ
 from threading import Event
 from time import perf_counter
 
+from gi.repository import Gio
+
 from . import proginit as pi
-from .dbus_middleware1.bus_provider import BusProvider
+from .dbus_ios1 import BusProviderIos1
+from .dbus_middleware1 import BusProviderMiddleware1
+from .dbus_middleware1.process_image.process_image_helper import ResetDriverWatchdog
 
 log = getLogger(__name__)
 
 
+class BusProvider(Enum):
+    middleware = "middleware"
+    ios = "ios"
+
+
 class MiddlewareDaemon:
     """Main program of MiddlewareDaemon class."""
 
-    def __init__(self):
+    def __init__(self, bus_provider: BusProvider):
         """Init MiddlewareDaemon class."""
         log.debug("enter MiddlewareDaemon.__init__")
 
         self._cycle_time = 1.0
         self.do_cycle = Event()
+        self._force_dbus_restart = False
         self._reconfigure = False
         self._running = True
 
         self.bus_provider = None
+        self.bus_provider_selected = bus_provider
+        self.wd_reset = ResetDriverWatchdog("")
 
         self._configure()
         log.debug("leave MiddlewareDaemon.__init__")
@@ -35,14 +49,56 @@ class MiddlewareDaemon:
         log.debug("enter MiddlewareDaemon._configure")
         pi.reload_conf()
 
+        if self._force_dbus_restart:
+            self.dbus_stop()
+        self._force_dbus_restart = False
+
+        if pi.pargs.procimg != self.wd_reset.procimg:
+            self.dbus_stop()
+
+            self.wd_reset.stop()
+            self.wd_reset = ResetDriverWatchdog(pi.pargs.procimg)
+            self.wd_reset.register_call(self._reset_driver_callack)
+
         log.debug("leave MiddlewareDaemon._configure")
 
+    @staticmethod
+    def _get_bus_address() -> str:
+        if pi.pargs.use_session_bus:
+            environ_name = "DBUS_SESSION_BUS_ADDRESS"
+            bus_address = Gio.dbus_address_get_for_bus_sync(Gio.BusType.SESSION)
+        else:
+            environ_name = "DBUS_SYSTEM_BUS_ADDRESS"
+            bus_address = Gio.dbus_address_get_for_bus_sync(Gio.BusType.SYSTEM)
+
+        return environ.get(environ_name, bus_address)
+
+    def _reset_driver_callack(self, *args) -> None:
+        log.debug("enter MiddlewareDaemon._reset_driver_callack")
+
+        if self.bus_provider_selected is BusProvider.ios:
+            self._force_dbus_restart = True
+            self.reload_config()
+
+        log.debug("leave MiddlewareDaemon._reset_driver_callack")
+
     def dbus_start(self):
         log.debug("enter MiddlewareDaemon.dbus_start")
-        if self.bus_provider and self.bus_provider.is_alive():
-            return
 
-        self.bus_provider = BusProvider(use_system_bus=not pi.pargs.use_session_bus)
+        dbus_running = self.bus_provider and self.bus_provider.is_alive()
+        if not dbus_running:
+            if self.bus_provider_selected is BusProvider.middleware:
+                self.bus_provider = BusProviderMiddleware1(
+                    dbus_address=self._get_bus_address(),
+                    picontrol_device=pi.pargs.procimg,
+                )
+            elif self.bus_provider_selected is BusProvider.ios:
+                self.bus_provider = BusProviderIos1(
+                    dbus_address=self._get_bus_address(),
+                    picontrol_device=pi.pargs.procimg,
+                )
+            else:
+                raise ValueError("Unknown bus provider")
             self.bus_provider.start()
 
         log.debug("leave MiddlewareDaemon.dbus_start")
@@ -54,7 +110,7 @@ class MiddlewareDaemon:
             self.bus_provider.stop()
             self.bus_provider.join(timeout=10.0)
             if self.bus_provider.is_alive():
-                log.warning("dbus provider thread is still alive")
+                log.warning(f"dbus {self.bus_provider.name} thread is still alive")
 
         log.debug("leave MiddlewareDaemon.dbus_stop")
 
@@ -85,7 +141,6 @@ class MiddlewareDaemon:
         # Startup tasks
         self.dbus_start()
 
-        pi.startup_complete()
         # Go into mainloop of daemon
         while self._running:
             ot = perf_counter()
@@ -95,6 +150,13 @@ class MiddlewareDaemon:
             if self._reconfigure:
                 self._configure()
                 self._reconfigure = False
+
+            # Monitor bus providers for errors and restart them
+            if not (self.bus_provider and self.bus_provider.is_alive()):
+                log.warning(f"dbus {self.bus_provider.name} thread is not alive - restarting")
+                self.dbus_start()
+
+            if self.bus_provider and self.bus_provider.published.is_set():
                 pi.startup_complete()
 
             # Cycle time calculation

src/revpi_middleware/dbus_ios1/__init__.py

@@ -0,0 +1,8 @@
+# -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+"""D-Bus ios version 1 of revpi_middleware."""
+
+from .ios1_helper import REVPI_DBUS_BASE_PATH, REVPI_DBUS_NAME
+
+from .bus_provider_ios1 import BusProviderIos1

src/revpi_middleware/dbus_ios1/bus_provider_ios1.py

@@ -0,0 +1,121 @@
+# -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+"""D-Bus bus provider for revpi_middleware."""
+
+from logging import getLogger
+from threading import Thread, Event
+
+import revpimodio2
+from gi.repository import GLib
+from pydbus import connect
+
+from . import REVPI_DBUS_NAME
+from .interface_devices import (
+    InterfaceDeviceManager,
+    InterfaceDevice,
+)
+from .interface_ios import (
+    InterfaceIoManager,
+    InterfaceInput,
+    InterfaceOutput,
+)
+
+log = getLogger(__name__)
+
+
+class BusProviderIos1(Thread):
+
+    def __init__(
+        self,
+        dbus_address: str,
+        picontrol_device="/dev/piControl0",
+        config_rsc="/etc/revpi/config.rsc",
+    ):
+        log.debug("enter BusProviderIos1.__init__")
+        super().__init__()
+
+        self._bus_address = dbus_address
+        self._loop = GLib.MainLoop()
+        self._lst_device_interfaces = []
+        self._lst_io_interfaces = []
+        self._modio = revpimodio2.RevPiModIO(
+            procimg=picontrol_device,
+            configrsc=config_rsc,
+            shared_procimg=True,
+        )
+
+        self.picontrol_device = picontrol_device
+        self.published = Event()
+        self.config_rsc = config_rsc
+
+    def run(self):
+        log.debug("enter BusProviderIos1.run")
+        bus = connect(self._bus_address)
+
+        self._lst_device_interfaces.clear()
+        self._lst_io_interfaces.clear()
+
+        for device in self._modio.device:
+            self._lst_device_interfaces.append(
+                InterfaceDevice(bus, device),
+            )
+
+        for io in self._modio.io:
+            interface = None
+            try:
+                if io.type == revpimodio2.INP:
+                    interface = InterfaceInput(bus, io)
+                elif io.type == revpimodio2.OUT:
+                    interface = InterfaceOutput(bus, io)
+                elif io.type == revpimodio2.MEM:
+                    # todo: Implement memory
+                    pass
+            except Exception as e:
+                log.warning(f"can not create dbus interface for {io.name}: {e}")
+
+            if interface is not None:
+                self._lst_io_interfaces.append(interface)
+
+        lst_interfaces = []
+        lst_interfaces += [
+            (interface.object_path, interface) for interface in self._lst_device_interfaces
+        ]
+        lst_interfaces += [
+            (interface.object_path, interface) for interface in self._lst_io_interfaces
+        ]
+        try:
+            bus.publish(
+                REVPI_DBUS_NAME,
+                InterfaceDeviceManager(self._lst_device_interfaces),
+                InterfaceIoManager(self._lst_io_interfaces, self._modio),
+                *lst_interfaces,
+            )
+            self.published.set()
+            log.info(f"published {REVPI_DBUS_NAME} on {self._bus_address}")
+        except Exception as e:
+            log.error(f"can not publish dbus {REVPI_DBUS_NAME}: {e}")
+
+        try:
+            self._loop.run()
+        except Exception as e:
+            log.error(f"can not run dbus mainloop: {e}")
+
+        bus.con.close()
+        self._modio.cleanup()
+        log.info(f"closed {REVPI_DBUS_NAME} connection to {self._bus_address}")
+
+        log.debug("leave BusProviderIos1.run")
+
+    def stop(self):
+        log.debug("enter BusProviderIos1.stop")
+        self._loop.quit()
+        log.debug("leave BusProviderIos1.stop")
+
+    @property
+    def name(self) -> str:
+        return REVPI_DBUS_NAME
+
+    @property
+    def running(self):
+        return self._loop.is_running()

src/revpi_middleware/dbus_ios1/interface_devices.py

@@ -0,0 +1,133 @@
+# -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+"""D-Bus interfaces for IOs."""
+
+from pydbus.bus import Bus
+from pydbus.generic import signal
+from revpimodio2.device import Device
+
+from .ios1_helper import get_io_object_path, get_device_object_path
+
+
+class InterfaceDevice:
+    """
+    <node>
+        <interface name="com.revolutionpi.ios1.Device">
+            <method name="GetDeviceInputs">
+                <arg name="object-path-list" type="ao" direction="out"/>
+            </method>
+            <method name="GetDeviceOutputs">
+                <arg name="object-path-list" type="ao" direction="out"/>
+            </method>
+            <property name="bmk" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="catalognr" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="comment" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="id" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="name" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="position" type="n" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="type" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+        </interface>
+    </node>
+    """
+
+    interface_name = "com.revolutionpi.ios1.Device"
+    PropertiesChanged = signal()
+
+    def __init__(self, dbus: Bus, device: Device):
+        self.dbus = dbus
+        self.device = device
+        self.object_path = get_device_object_path(device)
+
+    def GetDeviceInputs(self) -> list[str]:
+        return [get_io_object_path(io) for io in self.device.get_inputs()]
+
+    def GetDeviceOutputs(self) -> list[str]:
+        return [get_io_object_path(io) for io in self.device.get_outputs()]
+
+    @property
+    def bmk(self) -> str:
+        return self.device.bmk
+
+    @property
+    def catalognr(self):
+        return self.device.catalognr
+
+    @property
+    def comment(self):
+        return self.device.comment
+
+    @property
+    def id(self):
+        return self.device.id
+
+    @property
+    def name(self) -> str:
+        return self.device.name
+
+    @property
+    def position(self) -> int:
+        return self.device.position
+
+    @property
+    def type(self):
+        return self.device.type
+
+
+class InterfaceDeviceManager:
+    """
+    <node>
+        <interface name="com.revolutionpi.ios1.DeviceManager">
+            <method name="GetAllDevices">
+                <arg type="ao" direction="out"/>
+            </method>
+            <method name="GetByName">
+                <arg name="device-name" type="s" direction="in"/>
+                <arg name="object-path" type="o" direction="out"/>
+            </method>
+            <method name="GetByPosition">
+                <arg name="device-position" type="n" direction="in"/>
+                <arg name="object-path" type="o" direction="out"/>
+            </method>
+        </interface>
+    </node>
+    """
+
+    interface_name = "com.revolutionpi.ios1.DeviceManager"
+
+    def __init__(
+        self,
+        device_interfaces: list[InterfaceDevice],
+    ):
+        self._lst_device_interfaces = device_interfaces
+
+    def GetAllDevices(self) -> list[str]:
+        return [interface.object_path for interface in self._lst_device_interfaces]
+
+    def GetByName(self, device_name) -> str:
+        for interface in self._lst_device_interfaces:
+            if interface.device.name == device_name:
+                return interface.object_path
+
+        raise KeyError(f"No device with name '{device_name}' found.")
+
+    def GetByPosition(self, device_position) -> str:
+        for interface in self._lst_device_interfaces:
+            if interface.device.position == device_position:
+                return interface.object_path
+
+        raise KeyError(f"No device on position '{device_position}' found.")

src/revpi_middleware/dbus_ios1/interface_ios.py

@@ -0,0 +1,306 @@
+# -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+"""D-Bus interfaces for IOs."""
+
+from typing import Union, List
+
+from pydbus import Variant
+from pydbus.bus import Bus
+from pydbus.generic import signal
+from revpimodio2 import RevPiModIO, Cycletools, INP, OUT
+from revpimodio2.io import IOBase
+
+from .ios1_helper import get_io_object_path, get_variant_type
+
+
+class InterfaceInput:
+    """
+    <node>
+        <interface name="com.revolutionpi.ios1.Input">
+            <method name="SetByteorder">
+                <arg name="order" type="s" direction="in"/>
+            </method>
+            <method name="SetSigned">
+                <arg name="signed" type="b" direction="in"/>
+            </method>
+            <property name="address" type="n" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="bmk" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="bitaddress" type="n" access="readwrite">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="byteorder" type="s" access="readwrite">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
+            </property>
+            <property name="defaultvalue" type="v" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="length" type="q" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="name" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="signed" type="b" access="readwrite">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
+            </property>
+            <property name="value" type="v" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="true"/>
+            </property>
+        </interface>
+    </node>
+    """
+
+    interface_name = "com.revolutionpi.ios1.Input"
+    PropertiesChanged = signal()
+
+    def __init__(self, dbus: Bus, io: IOBase):
+        self._raw = False
+        self.dbus = dbus
+        self.io = io
+        self.object_path = get_io_object_path(io)
+        try:
+            self.variant_type = get_variant_type(self.io)
+        except ValueError:
+            # Fallback to bytes if the integer is too large
+            self._raw = True
+            self.variant_type = "ay"
+
+    def emit_io_change(self):
+        self.PropertiesChanged(
+            self.interface_name,
+            {
+                "value": Variant(
+                    self.variant_type,
+                    self.io.get_value() if self._raw else self.io.value,
+                ),
+            },
+            [],
+        )
+
+    def SetByteorder(self, order: str) -> None:
+        self.byteorder = order
+
+    def SetSigned(self, signed: bool) -> None:
+        self.signed = signed
+
+    @property
+    def address(self) -> int:
+        return self.io.address
+
+    @property
+    def bmk(self) -> str:
+        return self.io.bmk
+
+    @property
+    def bitaddress(self) -> int:
+        return self.io._bitaddress
+
+    @property
+    def byteorder(self) -> str:
+        return self.io.byteorder
+
+    @byteorder.setter
+    def byteorder(self, value: str) -> None:
+        if hasattr(self.io, "_set_byteorder"):
+            self.io._set_byteorder(value)
+            self.variant_type = get_variant_type(self.io)
+
+            # Changing the byteorder can change the value, but we do NOT send a signal for that
+            # because the real value of the process image was not changed. But we inform the client
+            # about the changed byteorder property.
+            self.PropertiesChanged(
+                self.interface_name,
+                {},
+                ["byteorder"],
+            )
+
+    @property
+    def defaultvalue(self) -> Variant:
+        return Variant(
+            self.variant_type,
+            self.io.get_value() if self._raw else self.io.defaultvalue,
+        )
+
+    @property
+    def length(self) -> int:
+        # 0 length for boolean
+        return 0 if self.variant_type == "b" else self.io.length
+
+    @property
+    def name(self) -> str:
+        return self.io.name
+
+    @property
+    def signed(self) -> bool:
+        if hasattr(self.io, "signed"):
+            return self.io.signed
+        return False
+
+    @signed.setter
+    def signed(self, value: bool) -> None:
+        if hasattr(self.io, "_set_signed"):
+            self.io._set_signed(value)
+            self.variant_type = get_variant_type(self.io)
+
+            # Changing the signedness can change the value, but we do NOT send a signal for that
+            # because the real value of the process image was not changed. But we inform the client
+            # about the changed signedness property.
+            self.PropertiesChanged(
+                self.interface_name,
+                {},
+                ["signed"],
+            )
+
+    @property
+    def value(self) -> Variant:
+        if not self.io._parentdevice._selfupdate:
+            self.io._parentdevice.readprocimg()
+
+        return Variant(
+            self.variant_type,
+            self.io.get_value() if self._raw else self.io.value,
+        )
+
+
+class InterfaceOutput(InterfaceInput):
+    """
+    <node>
+        <interface name="com.revolutionpi.ios1.Output">
+            <method name="SetByteorder">
+                <arg name="order" type="s" direction="in"/>
+            </method>
+            <method name="SetSigned">
+                <arg name="signed" type="b" direction="in"/>
+            </method>
+            <method name="SetValue">
+                <arg name="value" type="v" direction="in"/>
+            </method>
+            <property name="address" type="n" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="bmk" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="bitaddress" type="n" access="readwrite">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="byteorder" type="s" access="readwrite">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
+            </property>
+            <property name="defaultvalue" type="v" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="length" type="q" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="name" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="signed" type="b" access="readwrite">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
+            </property>
+            <property name="value" type="v" access="readwrite">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="true"/>
+            </property>
+        </interface>
+    </node>
+    """
+
+    interface_name = "com.revolutionpi.ios1.Output"
+
+    def SetValue(self, value: Variant) -> None:
+        self.value = value
+
+    @property
+    def value(self) -> Variant:
+        return super().value
+
+    @value.setter
+    def value(self, value: Variant) -> None:
+        if self._raw:
+            self.io.set_value(value)
+        else:
+            self.io.value = value
+        if not self.io._parentdevice._selfupdate:
+            self.io._parentdevice.writeprocimg()
+
+
+class InterfaceIoManager:
+    """
+    <node>
+        <interface name="com.revolutionpi.ios1.IoManager">
+            <method name="GetAllInputs">
+                <arg name="object-path-list" type="ao" direction="out"/>
+            </method>
+            <method name="GetAllOutputs">
+                <arg name="object-path-list" type="ao" direction="out"/>
+            </method>
+            <method name="GetByName">
+                <arg name="name" type="s" direction="in"/>
+                <arg name="object-path" type="o" direction="out"/>
+            </method>
+            <method name="ActivateIoSignals">
+            </method>
+            <method name="DeactivateIoSignals">
+            </method>
+            <signal name="IoChanged">
+                <arg name="name" type="s" direction="out"/>
+                <arg name="value" type="v" direction="out"/>
+            </signal>
+        </interface>
+    </node>
+    """
+
+    interface_name = "com.revolutionpi.ios1.IoManager"
+    IoChanged = signal()
+
+    def __init__(
+        self,
+        io_interfaces: List[Union[InterfaceInput, InterfaceOutput]],
+        modio: RevPiModIO,
+    ):
+        self._dc_io_interfaces = {interface.name: interface for interface in io_interfaces}
+        self.modio = modio
+
+        self.lst_inp_object_path = []
+        self.lst_out_object_path = []
+        for interface in io_interfaces:
+            if interface.io.type == INP:
+                self.lst_inp_object_path.append(interface.object_path)
+            elif interface.io.type == OUT:
+                self.lst_out_object_path.append(interface.object_path)
+
+    def _modio_cycle(self, ct: Cycletools) -> None:
+        for io_name in self._dc_io_interfaces:
+            interface = self._dc_io_interfaces[io_name]
+            if ct.changed(interface.io):
+                interface.emit_io_change()
+                self.IoChanged(
+                    interface.io.name,
+                    Variant(interface.variant_type, interface.io.value),
+                )
+
+    def GetAllInputs(self) -> list[str]:
+        return self.lst_inp_object_path
+
+    def GetAllOutputs(self) -> list[str]:
+        return self.lst_out_object_path
+
+    def GetByName(self, io_name) -> str:
+        if io_name in self._dc_io_interfaces:
+            return self._dc_io_interfaces[io_name].object_path
+
+        raise KeyError(f"No IO with name '{io_name}' found.")
+
+    def ActivateIoSignals(self) -> None:
+        if not self.modio._looprunning:
+            self.modio.autorefresh_all()
+            self.modio.cycleloop(self._modio_cycle, cycletime=50, blocking=False)
+
+    def DeactivateIoSignals(self) -> None:
+        self.modio.exit(False)

src/revpi_middleware/dbus_ios1/ios1_helper.py

@@ -0,0 +1,51 @@
+# -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+"""Helper for io read and write."""
+
+from logging import getLogger
+
+from revpimodio2.device import Device
+from revpimodio2.io import IOBase
+
+log = getLogger(__name__)
+
+REVPI_DBUS_NAME = "com.revolutionpi.ios1"
+REVPI_DBUS_BASE_PATH = "/com/revolutionpi/ios1"
+
+
+def get_io_object_path(io: IOBase) -> str:
+    return f"{REVPI_DBUS_BASE_PATH}/io/{io.name}"
+
+
+def get_device_object_path(device: Device) -> str:
+    return f"{REVPI_DBUS_BASE_PATH}/device/{device.position}"
+
+
+def get_variant_type(io: IOBase) -> str:
+    value_type = type(io.value)
+    byte_length = io.length
+    signed = io._signed
+
+    if value_type is bool:
+        return "b"
+
+    if value_type is float:
+        return "d"
+
+    if value_type is int:
+        if byte_length <= 2:
+            return "n" if signed else "q"
+        if byte_length <= 4:
+            return "i" if signed else "u"
+        if byte_length <= 8:
+            return "x" if signed else "t"
+        raise ValueError(f"Unsupported byte length: {byte_length}")
+
+    if value_type is str:
+        return "s"
+
+    if value_type is bytes:
+        return "ay"
+
+    raise TypeError(f"Unsupported type: {value_type}")

src/revpi_middleware/dbus_middleware1/__init__.py

@@ -2,7 +2,8 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """D-Bus middleware version 1 of revpi_middleware."""
+
 from .dbus_helper import REVPI_DBUS_BASE_PATH, REVPI_DBUS_NAME
 from .dbus_helper import extend_interface
 
-from .bus_provider import BusProvider
+from .bus_provider_middleware1 import BusProviderMiddleware1

src/revpi_middleware/dbus_middleware1/bus_provider_middleware1.py

@@ -2,38 +2,41 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """D-Bus bus provider for revpi_middleware."""
+
 from logging import getLogger
-from threading import Thread
+from threading import Thread, Event
 
 from gi.repository import GLib
-from pydbus import SessionBus, SystemBus
+from pydbus import connect
 
 from . import REVPI_DBUS_NAME
 from .process_image import InterfacePiControl
-from .system_config import InterfaceRevpiConfig
+from .system_config import InterfaceRevpiConfig, InterfaceSoftwareServices
 
 log = getLogger(__name__)
 
 
-class BusProvider(Thread):
+class BusProviderMiddleware1(Thread):
 
     def __init__(
         self,
+        dbus_address: str,
         picontrol_device="/dev/piControl0",
         config_rsc="/etc/revpi/config.rsc",
-        use_system_bus=True,
     ):
-        log.debug("enter BusProvider.__init__")
+        log.debug("enter BusProviderMiddleware1.__init__")
         super().__init__()
 
-        self._bus = SystemBus() if use_system_bus else SessionBus()
+        self._bus_address = dbus_address
         self._loop = GLib.MainLoop()
 
         self.picontrol_device = picontrol_device
+        self.published = Event()
         self.config_rsc = config_rsc
 
     def run(self):
-        log.debug("enter BusProvider.run")
+        log.debug("enter BusProviderMiddleware1.run")
+        bus = connect(self._bus_address)
 
         # The 2nd, 3rd, ... arguments can be objects or tuples of a path and an object
         #   Example(),
@@ -41,15 +44,18 @@ class BusProvider(Thread):
         #   ("Subdir2", Example()),
         #   ("Subdir2/Whatever", Example())
         lst_interfaces = [
-            InterfacePiControl(self.picontrol_device, self.config_rsc),
+            InterfacePiControl(bus, self.picontrol_device, self.config_rsc),
-            InterfaceRevpiConfig(),
+            InterfaceRevpiConfig(bus),
+            InterfaceSoftwareServices(bus),
         ]
 
         try:
-            self._bus.publish(
+            bus.publish(
                 REVPI_DBUS_NAME,
                 *lst_interfaces,
             )
+            self.published.set()
+            log.info(f"published {REVPI_DBUS_NAME} on {self._bus_address}")
         except Exception as e:
             log.error(f"can not publish dbus {REVPI_DBUS_NAME}: {e}")
 
@@ -58,18 +64,25 @@ class BusProvider(Thread):
         except Exception as e:
             log.error(f"can not run dbus mainloop: {e}")
 
+        bus.con.close()
+        log.info(f"closed {REVPI_DBUS_NAME} connection to {self._bus_address}")
+
         # Clean up all interfaces
         for interface in lst_interfaces:
             if type(interface) is tuple:
                 _, interface = interface
             interface.cleanup()
 
-        log.debug("leave BusProvider.run")
+        log.debug("leave BusProviderMiddleware1.run")
 
     def stop(self):
-        log.debug("enter BusProvider.stop")
+        log.debug("enter BusProviderMiddleware1.stop")
         self._loop.quit()
-        log.debug("leave BusProvider.stop")
+        log.debug("leave BusProviderMiddleware1.stop")
+
+    @property
+    def name(self) -> str:
+        return REVPI_DBUS_NAME
 
     @property
     def running(self):

src/revpi_middleware/dbus_middleware1/dbus_helper.py

@@ -5,6 +5,8 @@
 
 from logging import getLogger
 
+from pydbus.bus import Bus
+
 log = getLogger(__name__)
 
 REVPI_DBUS_NAME = "com.revolutionpi.middleware1"
@@ -13,6 +15,9 @@ REVPI_DBUS_BASE_PATH = "/com/revolutionpi/middleware1"
 
 class DbusInterface:
 
+    def __init__(self, bus: Bus):
+        self.bus = bus
+
     def cleanup(self):
         """
         Represents a method responsible for performing cleanup operations. This method is executed to properly

src/revpi_middleware/dbus_middleware1/process_image/__init__.py

@@ -2,4 +2,5 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """D-Bus interfaces for piControl driver."""
+
 from .interface_picontrol import InterfacePiControl

src/revpi_middleware/dbus_middleware1/process_image/interface_picontrol.py

@@ -2,8 +2,10 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """D-Bus interfaces for piControl."""
+
 from logging import getLogger
 
+from pydbus.bus import Bus
 from pydbus.generic import signal
 
 from .process_image_helper import PiControlIoctl, ResetDriverWatchdog
@@ -26,7 +28,9 @@ class InterfacePiControl(DbusInterface):
 
     NotifyDriverReset = signal()
 
-    def __init__(self, picontrol_device: str, config_rsc: str):
+    def __init__(self, bus: Bus, picontrol_device: str, config_rsc: str):
+        super().__init__(bus)
+
         self.picontrol_device = picontrol_device
         self.config_rsc = config_rsc
 

src/revpi_middleware/dbus_middleware1/process_image/process_image_helper.py

@@ -7,6 +7,7 @@ Helper for the process image.
 The ResetDriverWatchdog class is a copy of revpipyload project module "watchdogs"
 https://github.com/naruxde/revpipyload/blob/b51c2b617a57cc7d96fd67e1da9f090a0624eacb/src/revpipyload/watchdogs.py
 """
+
 import os
 from ctypes import c_int
 from fcntl import ioctl

src/revpi_middleware/dbus_middleware1/system_config/__init__.py

@@ -2,4 +2,6 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """D-Bus interfaces for system configuration."""
+
 from .interface_config import InterfaceRevpiConfig
+from .interface_services import InterfaceSoftwareServices

src/revpi_middleware/dbus_middleware1/system_config/interface_config.py

@@ -2,19 +2,20 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """D-Bus interfaces for hardware configuration."""
+
 from collections import namedtuple
 from logging import getLogger
 
+from pydbus.generic import signal
+
 from .revpi_config import (
     ConfigActions,
-    configure_avahi_daemon,
     configure_bluetooth,
     configure_con_can,
     configure_dphys_swapfile,
     configure_external_antenna,
     configure_gui,
     configure_wlan,
-    simple_systemd,
 )
 from ..dbus_helper import DbusInterface
 
@@ -42,19 +43,32 @@ class InterfaceRevpiConfig(DbusInterface):
                 <arg name="available" type="b" direction="out"/>
             </method>
             <property name="available_features" type="as" access="read"/>
+            <signal name="StatusChanged">
+                <arg name="feature" type="s"/>
+                <arg name="status" type="b"/>
+            </signal>
+            <signal name="AvailabilityChanged">
+                <arg name="feature" type="s"/>
+                <arg name="available" type="b"/>
+            </signal>
         </interface>
     </node>
     """
 
+    AvailabilityChanged = signal()
+    StatusChanged = signal()
+
     def Disable(self, feature: str) -> None:
         """Disable the feature."""
         feature_function = get_feature(feature)
         feature_function.function(ConfigActions.DISABLE, *feature_function.args)
+        self.StatusChanged(feature, False)
 
     def Enable(self, feature: str) -> None:
         """Enable the feature."""
         feature_function = get_feature(feature)
         feature_function.function(ConfigActions.ENABLE, *feature_function.args)
+        self.StatusChanged(feature, True)
 
     def GetStatus(self, feature: str) -> bool:
         """Get feature status."""
@@ -83,18 +97,8 @@ def get_feature(feature: str) -> FeatureFunction:
 AVAILABLE_FEATURES = {
     "gui": FeatureFunction(configure_gui, []),
     "revpi-con-can": FeatureFunction(configure_con_can, []),
-    "dphys-swapfile": FeatureFunction(configure_dphys_swapfile, []),
+    "swapfile": FeatureFunction(configure_dphys_swapfile, []),
-    "pimodbus-master": FeatureFunction(simple_systemd, ["pimodbus-master.service"]),
-    "pimodbus-slave": FeatureFunction(simple_systemd, ["pimodbus-slave.service"]),
-    "systemd-timesyncd": FeatureFunction(simple_systemd, ["systemd-timesyncd.service"]),
-    "ssh": FeatureFunction(simple_systemd, ["ssh.service"]),
-    "nodered": FeatureFunction(simple_systemd, ["nodered.service"]),
-    "noderedrevpinodes-server": FeatureFunction(
-        simple_systemd, ["noderedrevpinodes-server.service"]
-    ),
-    "revpipyload": FeatureFunction(simple_systemd, ["revpipyload.service"]),
     "bluetooth": FeatureFunction(configure_bluetooth, []),
     "wlan": FeatureFunction(configure_wlan, []),
-    "avahi": FeatureFunction(configure_avahi_daemon, []),
     "external-antenna": FeatureFunction(configure_external_antenna, []),
 }

src/revpi_middleware/dbus_middleware1/system_config/interface_services.py

@@ -0,0 +1,207 @@
+# -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+"""D-Bus interfaces for software services."""
+
+from logging import getLogger
+from typing import List
+
+from pydbus.bus import Bus
+from pydbus.generic import signal
+
+from ..dbus_helper import DbusInterface
+from ..systemd_helper import simple_systemd, ServiceActions
+
+log = getLogger(__name__)
+
+
+class InterfaceSoftwareServices(DbusInterface):
+    """
+    <node>
+        <interface name="com.revolutionpi.middleware1.SoftwareServices">
+            <method name="Disable">
+                <arg name="feature" type="s" direction="in"/>
+            </method>
+            <method name="Enable">
+                <arg name="feature" type="s" direction="in"/>
+            </method>
+            <method name="GetStatus">
+                <arg name="feature" type="s" direction="in"/>
+                <arg name="status" type="b" direction="out"/>
+            </method>
+            <method name="GetAvailability">
+                <arg name="feature" type="s" direction="in"/>
+                <arg name="available" type="b" direction="out"/>
+            </method>
+            <property name="available_features" type="as" access="read"/>
+            <signal name="StatusChanged">
+                <arg name="feature" type="s"/>
+                <arg name="status" type="b"/>
+            </signal>
+            <signal name="AvailabilityChanged">
+                <arg name="feature" type="s"/>
+                <arg name="available" type="b"/>
+            </signal>
+        </interface>
+    </node>
+    """
+
+    AvailabilityChanged = signal()
+    StatusChanged = signal()
+
+    def __init__(self, bus: Bus):
+        super().__init__(bus)
+
+        self.mrk_available = {}
+        self.mrk_status = {}
+
+        self.services = {
+            "pimodbus-master": ["pimodbus-master.service"],
+            "pimodbus-slave": ["pimodbus-slave.service"],
+            "ntp": ["systemd-timesyncd.service"],
+            "ssh": ["ssh.service"],
+            "nodered": ["nodered.service"],
+            "noderedrevpinodes-server": ["noderedrevpinodes-server.service"],
+            "revpipyload": ["revpipyload.service"],
+            "avahi": ["avahi-daemon.service", "avahi-daemon.socket"],
+        }
+
+        # Create a systemd manager interface object
+        systemd = self.bus.get(
+            "org.freedesktop.systemd1",
+            "/org/freedesktop/systemd1",
+        )
+        systemd_manager = systemd["org.freedesktop.systemd1.Manager"]
+
+        # Load all unit paths and subscribe to properties changed signal
+        self.object_paths = {}
+        for feature in self.services:
+
+            # Get the status and availability of the feature
+            self.mrk_available[feature] = self.GetAvailability(feature)
+            self.mrk_status[feature] = self.GetStatus(feature)
+
+            # Subscribe to properties changed signal for each unit
+            for unit_name in self.services[feature]:
+                unit_path = systemd_manager.LoadUnit(unit_name)
+                self.object_paths[unit_path] = feature
+
+                self.bus.subscribe(
+                    iface="org.freedesktop.DBus.Properties",
+                    signal="PropertiesChanged",
+                    object=unit_path,
+                    signal_fired=self._callback_properties_changed,
+                )
+
+        # Subscribe to the reloading signal to update the availability of the feature
+        self.bus.subscribe(
+            iface="org.freedesktop.systemd1.Manager",
+            signal="Reloading",
+            object="/org/freedesktop/systemd1",
+            signal_fired=self._callback_reloading_signal,
+        )
+
+    def _callback_reloading_signal(self, sender, object_path, interface, signal, parameters):
+        """
+        Handles the signal emitted for reloading and checks for changes in availability
+        and status for a set of services. If changes are identified, corresponding
+        update methods are triggered to reflect the new states.
+
+        Args:
+            sender: The entity sending the signal.
+            object_path: Path to the object emitting the signal.
+            interface: Interface through which the signal is sent.
+            signal: The signal being received.
+            parameters: A list of parameters associated with the signal.
+
+        Raises:
+            None
+        """
+        if parameters[0]:
+            return
+
+        for feature in self.services:
+            availability = self.GetAvailability(feature)
+            if self.mrk_available[feature] != availability:
+                self.mrk_available[feature] = availability
+                self.AvailabilityChanged(feature, availability)
+
+            status = self.GetStatus(feature)
+            if self.mrk_status[feature] != status:
+                self.mrk_status[feature] = status
+                self.StatusChanged(feature, status)
+
+    def _callback_properties_changed(self, sender, object_path, interface, signal, parameters):
+        """
+        Handles the 'PropertiesChanged' signal callback by updating internal status tracking for given
+        features and invoking status change notifications if necessary.
+
+        Args:
+            sender (Any): Information about the signal sender.
+            object_path (str): The path of the object emitting the signal.
+            interface (str): The interface where the signal was emitted.
+            signal (str): The name of the emitted signal.
+            parameters (tuple): Signal parameters containing interface name, changed properties, and
+                invalidated properties.
+
+        Raises:
+            TypeError: If the 'parameters' argument does not unpack to three expected values.
+        """
+        interface, changed_properties, invalidated_properties = parameters
+        if "ActiveState" not in changed_properties:
+            return
+
+        feature = self.object_paths[object_path]
+        status = self.GetStatus(feature)
+        if self.mrk_status[feature] != status:
+            self.mrk_status[feature] = status
+            self.StatusChanged(feature, status)
+
+    def _get_unit_names(self, feature: str) -> List[str]:
+        if feature not in self.services:
+            raise ValueError(f"feature {feature} does not exist")
+        return self.services[feature]
+
+    def Disable(self, feature: str) -> None:
+        """Disable the feature."""
+        action = ServiceActions.DISABLE
+        unit_names = self._get_unit_names(feature)
+
+        for unit_name in unit_names:
+            simple_systemd(action, unit_name)
+
+    def Enable(self, feature: str) -> None:
+        """Enable the feature."""
+        action = ServiceActions.ENABLE
+        unit_names = self._get_unit_names(feature)
+
+        for unit_name in unit_names:
+            simple_systemd(action, unit_name)
+
+    def GetStatus(self, feature: str) -> bool:
+        """Get feature status."""
+        unit_names = self._get_unit_names(feature)
+        rc_status = True
+
+        for unit_name in unit_names:
+            if not simple_systemd(ServiceActions.STATUS, unit_name):
+                rc_status = False
+                break
+
+        return rc_status
+
+    def GetAvailability(self, feature: str) -> bool:
+        """Get feature availability on the RevPi."""
+        unit_names = self._get_unit_names(feature)
+        rc_available = True
+
+        for unit_name in unit_names:
+            if not simple_systemd(ServiceActions.AVAILABLE, unit_name):
+                rc_available = False
+                break
+
+        return rc_available
+
+    @property
+    def available_features(self) -> list[str]:
+        return list(self.services.keys())

src/revpi_middleware/dbus_middleware1/system_config/revpi_config.py

@@ -10,12 +10,12 @@ from glob import glob
 from logging import getLogger
 from os import X_OK, access
 from os.path import exists, join
-from threading import Thread
 from typing import List, Optional
 
 from pydbus import SystemBus
 
 from ..dbus_helper import grep
+from ..systemd_helper import simple_systemd, ServiceActions
 
 log = getLogger(__name__)
 
@@ -42,6 +42,7 @@ class ComputeModuleTypes(IntEnum):
         CM4S (int): Represents a Compute Module 4S.
         CM5 (int): Represents a Compute Module 5.
     """
+
     UNKNOWN = 0
     CM1 = 6
     CM3 = 10
@@ -58,6 +59,7 @@ class ConfigActions(Enum):
     actions. It can be used to ensure consistency when working with or defining
     such actions in a system.
     """
+
     ENABLE = "enable"
     DISABLE = "disable"
     STATUS = "status"
@@ -232,6 +234,7 @@ class ConfigTxt:
         _config_txt_lines (list[str]): Contains all lines of the configuration
             file as a list of strings, where each string represents a line.
     """
+
     re_name_value = re.compile(r"^\s*(?!#)(?P<name>[^=\s].+?)\s*=\s*(?P<value>\S+)\s*$")
 
     def __init__(self):
@@ -432,18 +435,6 @@ class ConfigTxt:
         return self._config_txt_path
 
 
-def configure_avahi_daemon(action: ConfigActions):
-    return_value = simple_systemd(action, "avahi-daemon.service")
-
-    # Post actions for avahi-daemon
-    if action in (ConfigActions.ENABLE, ConfigActions.DISABLE):
-        # Apply the enable/disable action to the avahi socket AFTER the service
-        # unit, because a connected socket could interrupt stop
-        simple_systemd(action, "avahi-daemon.socket")
-
-    return return_value
-
-
 def configure_bluetooth(action: ConfigActions):
     hci_device = join(LINUX_BT_CLASS_PATH, "hci0")
     bt_rfkill_index = get_rfkill_index(hci_device)
@@ -509,7 +500,17 @@ def configure_con_can(action: ConfigActions):
 
 
 def configure_dphys_swapfile(action: ConfigActions):
-    return_value = simple_systemd(action, "dphys-swapfile.service")
+    # Translate config action to systemd action
+    if action is ConfigActions.ENABLE:
+        systemd_action = ServiceActions.ENABLE
+    elif action is ConfigActions.DISABLE:
+        systemd_action = ServiceActions.DISABLE
+    elif action is ConfigActions.STATUS:
+        systemd_action = ServiceActions.STATUS
+    else:
+        systemd_action = ServiceActions.AVAILABLE
+
+    return_value = simple_systemd(systemd_action, "dphys-swapfile.service")
 
     # Post actions for dphys-swapfile
     if action is ConfigActions.DISABLE:
@@ -634,98 +635,6 @@ def get_rfkill_index(device_class_path: str) -> Optional[int]:
     return None
 
 
-def simple_systemd(action: ConfigActions, unit: str):
-    """
-    Performs specified actions on systemd units.
-
-    This function allows interaction with systemd units for various operations
-    such as enabling, disabling, checking the status, and verifying availability.
-    It communicates with the systemd manager via the SystemBus and handles units
-    based on the action specified.
-
-    Parameters:
-        action (ConfigActions): Specifies the action to be performed on the
-                                systemd unit. Supported actions include ENABLE,
-                                DISABLE, STATUS, and AVAILABLE.
-        unit (str): The name of the systemd unit on which the action is to be
-                    performed.
-
-    Returns:
-        bool: For STATUS and AVAILABLE actions, returns True if the corresponding
-              criteria are met (e.g., enabled and active for STATUS, or not found
-              for AVAILABLE). Otherwise, returns False.
-
-    Raises:
-        ValueError: If the specified action is not supported.
-    """
-    bus = SystemBus()
-    systemd = bus.get(
-        "org.freedesktop.systemd1",
-        "/org/freedesktop/systemd1",
-    )
-    systemd_manager = systemd["org.freedesktop.systemd1.Manager"]
-
-    if action is ConfigActions.ENABLE:
-
-        def thread_unit_config():
-            """Change configuration asynchronously."""
-            # Dbus call: UnmaskUnitFiles(in as files, in b runtime, out a(sss) changes
-            lst_change_unmask = systemd_manager.UnmaskUnitFiles([unit], False)
-
-            # Dbus call: EnableUnitFiles(in as files, in b runtime, in b force,
-            #                            out b carries_install_info, out a(sss) changes
-            lst_change_enable = systemd_manager.EnableUnitFiles([unit], False, False)
-            if lst_change_unmask or lst_change_enable:
-                # Reload systemd after modified unit property
-                systemd_manager.Reload()
-
-        Thread(target=thread_unit_config, daemon=True).start()
-
-        # Dbus call: StartUnit(in s name, in s mode, out o job
-        systemd_manager.StartUnit(unit, "replace")
-
-    elif action is ConfigActions.DISABLE:
-
-        def thread_unit_config():
-            """Change configuration asynchronously."""
-            # Dbus call: DisableUnitFiles (in as files, in b runtime, out a(sss) changes)
-            change = systemd_manager.DisableUnitFiles([unit], False)
-            if change:
-                # Reload systemd after modified unit property
-                systemd_manager.Reload()
-
-        Thread(target=thread_unit_config, daemon=True).start()
-
-        # Dbus call: StopUnit(in s name,in s mode, out o job
-        systemd_manager.StopUnit(unit, "replace")
-
-
-    elif action is ConfigActions.STATUS:
-        try:
-            unit_path = systemd_manager.LoadUnit(unit)
-            properties = bus.get("org.freedesktop.systemd1", unit_path)
-        except Exception:
-            log.warning(f"could not get systemd unit {unit}")
-            return False
-
-        return properties.UnitFileState == "enabled" and properties.ActiveState == "active"
-
-    elif action is ConfigActions.AVAILABLE:
-        try:
-            unit_path = systemd_manager.LoadUnit(unit)
-            properties = bus.get("org.freedesktop.systemd1", unit_path)
-        except Exception:
-            log.warning(f"could not get systemd unit {unit}")
-            return False
-
-        return properties.LoadState != "not-found"
-
-    else:
-        raise ValueError(f"action {action} not supported")
-
-    return None
-
-
 if __name__ == "__main__":
     rc = RevPiConfig()
     print("Model:", rc.model)

src/revpi_middleware/dbus_middleware1/systemd_helper.py

@@ -0,0 +1,121 @@
+# -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+from enum import Enum
+from logging import getLogger
+from threading import Thread
+from typing import Optional
+
+from pydbus import SystemBus
+
+log = getLogger(__name__)
+
+
+class ServiceActions(Enum):
+    """
+    Enumeration class for defining configuration actions.
+
+    This enumeration provides predefined constants for common configuration
+    actions. It can be used to ensure consistency when working with or defining
+    such actions in a system.
+    """
+
+    ENABLE = "enable"
+    DISABLE = "disable"
+    STATUS = "status"
+    AVAILABLE = "available"
+
+
+def simple_systemd(action: ServiceActions, unit: str, unmask: bool = False) -> Optional[bool]:
+    """
+    Perform systemd service actions such as enable, disable, check status, or availability.
+
+    This function interacts with the systemd D-Bus API to manage and query the
+    state of services on a system. The supported actions include enabling a systemd
+    unit, disabling it, starting/stopping a unit, and checking its status or
+    availability. The function supports asynchronous configuration changes through
+    threads where applicable.
+
+    Parameters:
+        action (ServiceActions): The action to perform on the systemd service.
+            Supported actions are ENABLE, DISABLE, STATUS, and AVAILABLE.
+        unit (str): The name of the systemd unit to operate on (e.g., "example.service").
+        unmask (bool): When enabling a unit, if True, any masked unit file will
+            first be unmasked before proceeding with the operation. Defaults to False.
+
+    Returns:
+        Optional[bool]: The return value depends on the action. For STATUS or
+            AVAILABLE actions, it returns True if the unit satisfies the condition
+            (e.g., enabled and active, or available and loaded), False otherwise.
+            For other actions, it returns None.
+    """
+    bus = SystemBus()
+    systemd = bus.get(
+        "org.freedesktop.systemd1",
+        "/org/freedesktop/systemd1",
+    )
+    systemd_manager = systemd["org.freedesktop.systemd1.Manager"]
+
+    if action is ServiceActions.ENABLE:
+
+        def thread_unit_config():
+            """Change configuration asynchronously."""
+            lst_change_unmask = []
+            if unmask:
+                # Dbus call: UnmaskUnitFiles(in as files, in b runtime, out a(sss) changes
+                lst_change_unmask = systemd_manager.UnmaskUnitFiles([unit], False)
+
+            # Dbus call: EnableUnitFiles(in as files, in b runtime, in b force,
+            #                            out b carries_install_info, out a(sss) changes
+            lst_change_enable = systemd_manager.EnableUnitFiles([unit], False, False)
+            if lst_change_unmask or lst_change_enable:
+                # Reload systemd after modified unit property
+                systemd_manager.Reload()
+
+        Thread(target=thread_unit_config, daemon=True).start()
+
+        # Dbus call: StartUnit(in s name, in s mode, out o job
+        systemd_manager.StartUnit(unit, "replace")
+
+    elif action is ServiceActions.DISABLE:
+
+        def thread_unit_config():
+            """Change configuration asynchronously."""
+            # Dbus call: DisableUnitFiles (in as files, in b runtime, out a(sss) changes)
+            change = systemd_manager.DisableUnitFiles([unit], False)
+            if change:
+                # Reload systemd after modified unit property
+                systemd_manager.Reload()
+
+        Thread(target=thread_unit_config, daemon=True).start()
+
+        # Dbus call: StopUnit(in s name,in s mode, out o job
+        systemd_manager.StopUnit(unit, "replace")
+
+    elif action is ServiceActions.STATUS:
+        try:
+            unit_path = systemd_manager.LoadUnit(unit)
+            properties = bus.get("org.freedesktop.systemd1", unit_path)
+        except Exception:
+            log.warning(f"could not get systemd unit {unit}")
+            return False
+
+        return properties.UnitFileState == "enabled" and properties.ActiveState in (
+            "active",
+            "activating",
+        )
+
+    elif action is ServiceActions.AVAILABLE:
+        try:
+            unit_path = systemd_manager.LoadUnit(unit)
+            properties = bus.get("org.freedesktop.systemd1", unit_path)
+        except Exception:
+            log.warning(f"could not get systemd unit {unit}")
+            return False
+
+        return properties.LoadState != "not-found"
+
+    else:
+        raise ValueError(f"action {action} not supported")
+
+    return None

src/revpi_middleware/main_application.py

@@ -2,9 +2,10 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """Main application of revpi-middleware daemon."""
+
 from logging import getLogger
 
-from .daemon import MiddlewareDaemon
+from .daemon import MiddlewareDaemon, BusProvider
 from . import proginit as pi
 
 log = getLogger(__name__)
@@ -26,6 +27,19 @@ pi.parser.add_argument(
     default="/etc/{0}/{0}.conf".format(pi.programname),
     help="application configuration file",
 )
+pi.parser.add_argument(
+    "--procimg",
+    dest="procimg",
+    default="/dev/piControl0",
+    help="Path to process image",
+)
+pi.parser.add_argument(
+    "bus_provider",
+    default="middleware",
+    nargs="?",
+    choices=["middleware", "ios"],
+    help="bus provider to use",
+)
 
 
 def main() -> int:
@@ -34,7 +48,7 @@ def main() -> int:
     # Parse command line arguments
     pi.init_app()
 
-    root = MiddlewareDaemon()
+    root = MiddlewareDaemon(BusProvider(pi.pargs.bus_provider))
 
     # Set signals
     signal.signal(signal.SIGHUP, lambda n, f: root.reload_config())

src/revpi_middleware/proginit.py

@@ -2,6 +2,7 @@
 # SPDX-FileCopyrightText: 2018-2023 Sven Sager
 # SPDX-License-Identifier: LGPL-2.0-or-later
 """Global program initialization."""
+
 __author__ = "Sven Sager"
 __copyright__ = "Copyright (C) 2018-2023 Sven Sager"
 __license__ = "LGPL-2.0-or-later"

tests/dbus_middleware1/bus_provider.py

@@ -3,6 +3,8 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 from time import sleep
 
+from gi.repository.Gio import dbus_address_get_for_bus_sync, BusType
+
 from tests.dbus_middleware1.fake_devices import PiControlDeviceMockup
 
 
@@ -12,12 +14,13 @@ class TestBusProvider(PiControlDeviceMockup):
         super().setUp()
 
         # Do not import things on top of the module. Some classes or functions need to be mocked up first.
-        from revpi_middleware.dbus_middleware1 import BusProvider
+        from revpi_middleware.dbus_middleware1 import BusProviderMiddleware1
 
         # Prepare the bus provider and start it
-        self.bp = BusProvider(
+        bus_address = dbus_address_get_for_bus_sync(BusType.SESSION)
-            self.picontrol.name,
+        self.bp = BusProviderMiddleware1(
-            use_system_bus=False,
+            bus_address,
+            picontrol_device=self.picontrol.name,
         )
         self.bp.start()