In this design, ESP32 is used to implement the serial port Bluetooth function, replacing the mobile phone Bluetooth debugging assistant to wirelessly control the Bluetooth smart car. The serial port Bluetooth module is set to master mode and automatically connects to the Bluetooth device-smart car (client mode). There is no need to use AT commands. After connecting to the Bluetooth device, the serial port data is forwarded through Bluetooth, and finally the remote control of the Bluetooth smart car is achieved. The effect is now tested using the serial port debugging assistant that comes with Arduino.
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