Serial profile may be easiest. Makes it so much easier to test IMHO. How easy would it be to script a file read/bt send vrs some custom protocol? Serial profiles will be well documented. Also it would be a natural hook into the ESP ROM programming routines. Little bit of driver middle & then you ...

I made a project with a BLE GATT server on ESP32, and a mobile that connects to the device and sending the update using chuncks of the bin files
Do you already have a BT or BLE server in your ESP32 project?


Yes,I already have a BT in my ESP32 project.

How could you divide the bin file so i ...

I'm using an esp32, I need to update the firmware through Bluetooth.

so that .bin file wants to be sent through Bluetooth.., could you please tell me,
how can it possible?

Thanks.