Logitech Control Daemon (MVP)

A Linux-only daemon that exposes a DBus API for controlling Logitech devices. This base project provides structure and stubs only (no real HID++ or DPI logic yet). A GUI will be a separate DBus client later.

Build (CMake)

mkdir -p build
cd build
cmake ..
cmake --build .

Targets:

• logicontrol_core (library)
• logicontrold (executable)

Note: Requires sdbus-c++ available via CMake's find_package. On Debian/Ubuntu, install libsdbus-c++-dev.

Run manually

./build/logicontrold

This daemon acquires the user/session bus name com.logi.Control, registers object /com/logi/Control with interface com.logi.Control, and enters the DBus event loop.

systemd user unit

This project includes a user service unit template at systemd/logicontrold.service.

Install it:

mkdir -p ~/.config/systemd/user
cp systemd/logicontrold.service ~/.config/systemd/user/logicontrold.service
# Edit ExecStart to point to your build path (e.g., /home/you/path/to/logi-control/build/logicontrold)

systemctl --user daemon-reload
systemctl --user enable --now logicontrold.service

Test DBus methods

Use busctl --user:

busctl --user call com.logi.Control /com/logi/Control com.logi.Control ListDevices
busctl --user call com.logi.Control /com/logi/Control com.logi.Control GetDpi s "stub-device-1"
busctl --user call com.logi.Control /com/logi/Control com.logi.Control SetDpi su "stub-device-1" 1200

Expected results (MVP):

• ListDevices: returns 1-2 stub devices as a(ss)
• GetDpi: returns (false, 0)
• SetDpi: returns (false, "Not implemented")

Notes

• Linux-only. No GUI, no polkit, no packaging.
• No real HID++ commands or DPI logic yet (stubs with TODO).
• Future work will add device enumeration via hidraw/libudev and input remapping via libevdev/uinput.