btd700ctl

unofficial linux driver for the Sennheiser BTD 700 dongle

This project provides an interface for the missing dongle control functionality for Linux, equivalent to Sennheiser Dongle Control software.

features

• audio mode control (high quality / low latency / broadcast)
• codec selection
• bluetooth connection mode control
• device features and status queries
• event monitoring (connection, codec changes, etc.)
• force (dis)connection of known devices
• factory reset
• PipeWire sink switching daemon

missing

• software updates
• broadcast settings
• BTD 600 support (?)

known bugs

• "Is gaming mode available" query doesn't work, but setting gaming mode works fine

getting started

requirements

• C99 compiler
• cmake
• hidapi-hidraw

# debian/ubuntu
sudo apt install build-essential cmake libhidapi-dev

# arch
sudo pacman -S base-devel cmake hidapi

# fedora
sudo dnf install gcc cmake hidapi-devel

build

mkdir build && cd build
cmake ..
make
sudo make install

udev rules for non-root access

sudo cp udev/99-btd700.rules /etc/udev/rules.d/
sudo udevadm control --reload-rules
sudo udevadm trigger

daemon

btd700d automatically switches your default PipeWire audio sink to the BTD700 when a bluetooth device connects, and restores the previous sink on disconnect.

# run manually
btd700d

# or install as a systemd user service
systemctl --user enable --now btd700d.service

contributing

Pull requests welcome! Don't hesitate to contact me if you need any help with the implementation.

thanks to

• dnSpy/ILSpy contributors
• all the good people of the world

license

btd700ctl is distributed under the GNU LGPL-2.1 License. See the LICENSE file for details.