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Serial communication
Serial communication generally refers to the Universal Asynchronous Receiver/Transmitter (UART), which is
commonly used in electronic circuit communication. It has two communication lines, one is responsible for
sending data (TX line) and the other for receiving data (RX line). The serial communication connections of
two devices is as follows:
Device 1 Device 2
Before serial communication starts, the baud rate of both sides must be the same. Communication between
devices can work only if the same baud rate is used. The baud rates commonly used is 9600 and 115200.
Serial port on ESP32-S3
Freenove ESP32-S3 has integrated USB to serial transfer, so it could communicate with computer connecting
to USB cable.
ESP32-S3 USB to Serial Computer
Arduino Software also uploads code to Freenove ESP32-S3 through the serial connection.
Your computer identifies serial devices connecting to it as COMx. We can use the Serial Monitor window of
Arduino Software to communicate with Freenove ESP32-S3, connect Freenove ESP32-S3 to computer
through the USB cable, choose the correct device, and then click the Serial Monitor icon to open the Serial
Monitor window.
Interface of serial monitor window is as follows. If you can't open it, make sure Freenove ESP32-S3 has been
connected to the computer, and choose the right serial port in the menu bar "Tools".
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