ESP32 Bluetooth LE firmware update through android App via OTA

[Shariq Hussain]

Hi,
We are working on a project (ESP32-C3) that is for remote area where it's hard to find internet network, here we want to update firmware via OTA. Compiled Bin files already stored in android mobile phone, We want that user just click on Android App to flash that bin file to ESP32 BLE device via OTA. We are new to this, so help us regarding to that what we have to add in our firmware that provides feasiblity to android App for software update via OTA.