ESP32 Tacho

See below on information how to compile

Features (IN DEVELOPMENT)

Connect to a classic "Forumslader" (forumslader.de) (5.4 with classic Bluetooth)
Connect to a BLE Heart Rate Monitor
Output to 128x64 OLED
Output to 8x WS2812 strip
3D printed case / mount for riserbar

Todo:

[ ] Touch input for OLED menu [ ] Get rid of hardcoded BT connections (discovery) [ ] Robustness (reconnect, ..) [ ] Streamline OLED display (larger font for speed etc.) [ ] Support for Cadence BLE device [ ] Headlights (some bright LED) as additional "off-road" light

the 12V supply allow it to add some very bright leds

[ ] 6V bike light output (6V for my BM bike lamps)

currently it is in parallel to the Forumslader which means the battery can't be charged while light is on

[ ] Main switch

[ ] automatic stopwatch timer (cycling, stopping, resting, ...)

Ideas

add gyro
- alarm system
- maybe useful to improve statistics, e.g. "lost time due to traffic"
add bell/sound
- for alarm system
- as bell/horn
add more lights as ambient light (useful when locking your bike at night or at campsite etc.)

Possible extensions (not in my scope for now):

adaption to newer variants of Forumslader should be possible
BLE for other speed measurement

Goal

Biketour from Munich to Barcelona in May/June 2022

Build

To be built with platformio.

If platformio is installed, you can run platformio run to build.

However, there are some issues with the Arduino ESP32 framework right now, so

the configuration in platformio.ini is a little bit weird
For now, you need to patch BluetoothSerial.cpp in your platformio-packages (~/.platformio/packages/framework-arduinoespressif32/libraries/BluetoothSerial/src)
- Probably I will fork the framework so it is installable automatically
- see framework-arduino-esp32-BTSerial.patch