I have trying to find examples for codes to exchange data over bluetooth between esp32 devkit module and an Android device. I want to use SDP to broadcast a service and then make my Android app connect to esp socket as client. In Linux I have used bluez library to achieve this functionality. But for ESP32 I only found some documentations using btstack library. However I am unable to use this library. I extract the zip to ~/Documents/Arduino/Libraries but it still it says file not found.
I can't comment so I am putting an answer here. @Helmer if you can move these answers to comment it will be a great help. Please refer to these examples to connect and exchange data between a Mobile app and ESP32 dev kit over a Bluetooth communication: