I actually did something similar with a really cheap micro-controller+Arduino with an OLED screen and an Echelon Fit stationary bike. It connects via Bluetooth

I actually did something similar with a really cheap micro-controller+Arduino with an OLED screen and an Echelon Fit stationary bike. It connects via Bluetooth and displays Peleton compatible stats. https://github.com/snowzach/echbt https://github.com/snowzach/echbt