Pyloton is a CircuitPython bike computer made with the CLUE board. Pyloton measures Bluetooth LE heart rate, speed, and cadence.

It also provides Apple Music Service song info, combined on one small device with a sharp display and a 3D printed handlebar mount (or optional wrist mount).

This project is the culmination of three previous Adafruit Learning System projects, plus some new abilities of our Bluefruit code to connect to multiple peripheral devices!

Previously, we created these standalone projects:

• Now Playing: Bluetooth LE Apple Media Service Display
• BLE Heart Rate Zone Trainer Display
• BLE Cycling Speed & Cadence Sensor Display

You may refer to those guides for additional details on the sensors, libraries, and code. Here, we'll show you how they can all be combined into one device.

Parts List

• CLUE
• 420mAh battery or
  • 400mAh
  • 350mAh
• Slide Switch
• JST Extension
• Two 3/8 to 1/4-20 thread
• 1/4" to 1/4" Screw Adapter
• Swivel-Head Pan Tilt
• M5x16mm screw + nut
• Wahoo sensor
• PLA or ABS Filament

Heart Rate Monitor

You'll need a heart rate monitor that supports Bluetooth Low Energy (BLE). I'm using the Scosche RHYTHM+ but you should be able to use any monitor that uses the Bluetooth SIG Heart Rate service standard.

These work by flashing green (and sometimes yellow) LEDs against your skin and then measuring the reflected light that returns. The color changes/darkens during the pulse of your heart thanks to all that blood sloshing around!

Cycling Speed & Cadence Sensor

Bluetooth LE compatible, such as the Wahoo Fitness Blue SC. This type of device is two sensors in one package and typically reads speed and cadence revolutions based on a pair of magnets affixed to a spoke and crank.

You can also use individual speed and/or cadence sensors that use an IMU rather than a magnet to sense revolutions, such as the Wahoo RPM Speed and RPM Cadence.

Be sure that your sensors use Bluetooth LE and not Ant+ or some other radio standard. (Some use both, which is fine.)

iOS Device

You'll also need an iPhone or iPod touch with BLE capabilities if you want to see song playback info on the Pyloton.