Bike trainer sensor

This is an open source sensor for bike trainers, such as Tacx Boost, Kurt Kinetc Road, Elite Qubo Fluid etc. Purpose of this project is to be able to replace the sensor on your trainer if it stops working, or if the company shuts down trainer app. This happened to me with Kurt Kinetec, and since they have propriarety BLE service, the sensor is useless.

This sensor uses Bluetooth LE protocol with Cycling Speed and Cadence Profile, which is standard profile and compatible with all trainer apps, like Zwift, TrainerRoad and others.

Firmware development

SDK Installation

Video instructions

1. Install nRF Command Line Tools (Download)
2. Install Visual Studio Code (Download)
3. Make sure to install SDK version 2.9.0!

Development setup

1. After cloning git repository, open Firmware.code-workspace with VS Code.
2. Go to nRF Connect and create build configuration. Under APPLICATIONS add build the configuration.
   • Board: nrf52840dk_nrf52840 or other board.
   • Build directory name: release or debug
   • Select Base configuration files: prj_release.conf or prj_debug.conf
   • Select Extra Kconfig fragmetns: bt.conf

For API and how to, check Nordic's developer website.