There is a Universal Treadmill speed sensor for Zwift with Ant+ stick and Raspberry Pi: https://gallochri.com/2020/05/universal-treadmill-speed-sensor-for-zwift-with-ant-stick-and-raspberry-pi/
There is a Universal Treadmill speed sensor for Zwift with Ant+ stick and Raspberry Pi: https://gallochri.com/2020/05/universal-treadmill-speed-sensor-for-zwift-with-ant-stick-and-raspberry-pi/