Bluetooth Low Energy companion display for Komoot app
Hardware : LilyGO T5 v2.3.1_2.13 2.13" ESP32 eink dev board and a 3d printed case
How to use the device :
1.Important step:
Edit this file: libraries/BLE/src/BLERemoteCharacteristic.cpp
Remove lines in the registerForNotify function before the else statement:
uint8_t val[] = {0x01, 0x00};
if(!notifications) val[0] = 0x02;
BLERemoteDescriptor* desc = getDescriptor(BLEUUID((uint16_t)0x2902));
desc->writeValue(val, 2);Komoot does not use the 0x2902 descriptor convention
How to use the device :
- Upload the ino program
//Pairing
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Open the komoot app and navigate to profile>settings>Ble connect. tap on cyclo-hac and turn on esp32
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Go back and start the navigation under plan and the display will start updating !
Why this design?
The navigation app keeps the phone display ON during operation. It is hard on the battery life especially when we need to keep it maximum brightness for visibility in outdoor conditions. This companion device solves both these issues by implementing a low power design that has greater visibility in bright outdoor conditions.