A simple example to develop a BLE Scanner using ESP32. It uses at least 2 ESP devices. The devices are classified into 2 types:
• Server
• Client
In this example, the following steps are performed
• The server device, also called Advertised device, broadcasts a BLE Server
• The client or scanner device scans for various advertised devices
• Checks if our device is present among them and returns its RSSI
• The RSSI value is then used to actuate the buzzer connected to the client device
• The repetition intensity of beeps represent proximity of the client from the server
This particular example can be used to play a Treasure Hunt game.