A while ago, I picked up a Sportstech S-Walk treadmill — a compact walking pad with built-in Bluetooth support. Naturally, I wanted to get more out of it than the default app experience and the default app just sucked big time. So I started digging into the treadmill’s BLE (Bluetooth Low Energy) capabilities to read real-time speed, distance, and workout time. I found myself in FTMS (Fitness Machine Service), a standard for communicating protocol with fitness equipment over BLE.
