Android app to perform OTA update on ESP32 via BLE

BLE-OTA-v1.0.apk

ESP32 Code

1. Choose the binary file to be sent
2. Split the file into parts (16384 bytes each)
3. Send a command to format the SPIFFS
4. Send a command specifying the number of parts and MTU size
5. Send the first part to the board
6. Send a command indicating completion of the part along with the number of bytes (this will trigger writing to the update.bin file along with a request to the next part)
7. Receive request of a part specifying the part number (repeat 5, 6 & 7)
8. After all parts have been sent trigger a restart in order to apply the update