I use ESP32-S3.
After compiling and uploading the code below, nothing will be printed on the IDE serial monitor.
The speed of the IDE serial monitor is also set to 9600bps.
void setup() {
Serial.begin(9600);
}
void loop() {
Serial.println("Hello");
delay(1000);
}
Hi @greatcrown. If you don't have it already, try selecting Tools > USB CDC On Boot > Enabled from the Arduino IDE menus and then upload the sketch to your ESP32-S3 board again.
After doing that, does the serial communication work as expected?
More information on the subject here:
https://docs.espressif.com/projects/arduino-esp32/en/latest/tutorials/cdc_dfu_flash.html#usb-cdc
"Tools > USB CDC On Boot > Enabled" is already applied.
But it did not work.
Do you have 2 USB connectors on your board? The one I have has 2 connectors and the serial monitor only works with the one that is connected to the USB-serial converter chip.
Kindly go through it and edit you post accordingly
I posted a picture of my board. It has 2 USB connectors.
It appears that the one on the left is connected to the USB-serial chip.
I resolved.
USB CDC On Boot : Disabled
I guess you must have connected your board to the computer via the "UART" USB socket that is labeled "UART" on the board silkscreen:
When you have Tools > USB CDC On Boot > Disabled selected from the Arduino IDE menus, calling Serial.println etc. in your sketch will cause the serial communication to be done via that socket's serial port.
When you have Tools > USB CDC On Boot > Enabled selected from the Arduino IDE menus, serial communication will instead be done via the serial port of the USB socket labeled "USB":
On boards that only have one USB socket, Tools > USB CDC On Boot > Enabled should be used to enable serial communication via that USB socket's port.
