How can RTS/CTS (Hardware Flow Control) be enabled on the Bluetooth /dev/tty* UART port in Linux for a Wi-Fi Module with integrated Bluetooth?

Sterling-LWB5+

Answer

Configure the UART parameters using stty before running btattach. Use the "crtscts" option to enable RTS/CTS.

Note: Here, crtscts is the option to enable RTS/CTS hardware flow control on the serial port, and -crtscts is the option to disable RTS/CTS hardware flow control. Note the hyphen (Enable = crtscts, Disable = -crtscts)

stty -F /dev/ttymxc0 crtscts

(Make sure to change the "/dev/ttymxc0" to your actual device.)

After you have set RTS/CTS flow control, you can check the current settings of your UART device with the stty command to ensure that it is correctly configured:

stty -F /dev/ttymxc0 -a

This command will display all the settings for the specified UART device. Look for crtscts in the output, which indicates that RTS/CTS flow control is enabled.

To disable RTS/CTS hardware flow control on a serial port using the stty command, you can use the -crtscts option (including the hyphen).

stty -F /dev/ttymxc0 -crtscts