DFRobot FireBeetle ESP32-E Manual page 24

Member Functions
SerialBT.begin()
Description：init Bluetooth module
SerialBT.disconnect()
Description: disconnect device
Return: ture/false
SerialBT.connect()
Description: connect device
Return: ture/false
SerialBT.available()
Description: judge if the Bluetooth received data
SerialBT.read()
Description: read the information received by the Bluetooth
Return: string
SerialBT.write()
Description: send message by Bluetooth
7.4 WiFi Tutorial
The ESP32 supports WiFi function. Here we build a WiFi server with the ESP32, and use the client to connect it to control an LED remotely.