Coming Soon
This project is being tested and polished. Check back soon!
Intermediate2-5 hours each13+No extra parts needed
Build a DIY Bike Computer, Speedometer & More ESP32 Wearables
Your $300 Garmin bike computer runs on a chip less powerful than an ESP32. Your $250 smartwatch has less RAM. Let’s build the outdoor versions.
Six projects. Real code. Parts that cost less than a bike helmet. Whether you want a speedometer on your handlebars, a GPS route logger for your hikes, or a heart rate display you built yourself — the ESP32 can do all of it.
Projects
Intermediate
| Project | What you’ll build | Time |
|---|---|---|
| BLE Heart Rate Display | A wrist display that connects to any Bluetooth heart rate monitor and color-codes by training zone | ~2h |
| GPS Bike Computer with SD Logger | A handlebar-mounted GPS computer that logs every ride as a GPX file | ~3h |
| DIY Bike Speedometer | A hall-sensor speedometer with a round display showing speed, distance, and ride time | ~3h |
| Fitness Step Counter Watch | A wrist-worn step counter with daily goal tracking using an accelerometer | ~4h |
| Trail Logger with LoRa Radio | A GPS tracker that shares your position over LoRa mesh — no cell service needed | ~3h |
Advanced
| Project | What you’ll build | Time |
|---|---|---|
| DIY Cycling Power Meter | A strain-gauge power meter that broadcasts watts over BLE to any cycling head unit | ~5h |
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