How to send data to a serial port in Linux?

To send data to the serial port, you can use the following command:

1. Utilize the echo command:
2. “Send data to be transmitted” > /dev/ttyS0
3. This will send the specified data to the serial port device /dev/ttyS0. Depending on your system and hardware configuration, the serial port device may have a different name (such as /dev/ttyS1 or /dev/ttyUSB0).
4. Utilize the cat command:
5. Send the output of the “cat” command to the serial port /dev/ttyS0.
6. Next, you can input the data you want to send in the terminal and press Ctrl+C to finish the input.

Please note that sending data to the serial port may require specific permissions. You may need to execute the above command as the root user or add your user to the dialout group.