For Firmware Update of the UAB ESP32 you need to:
1. Unzip the firmware you want to load and copy it in the root directory of the sd card.
2. The filename MUST be "DM88_FW.bin" (e.g. E:\DM88_FW.bin)
3. After powerup the ESP32 uses the "DM88_FW.bin" file to update itself. This takes about 30 seconds and all 4 LED´s are on.
4. If the update was successful the ESP32 deletes the file "DM88_FW.bin"

So if the file is gone the update was successful !
Done

