Disable HWFC in serial modem application

[upswing]

 Is there a way to configure the serial LTE modem application to communicate through the UART using a 2-wire Tx/Rx with Hardware flow control disabled?

I have read that you can toggle this parameter:

CONFIG_SLM_DATAMODE_HWFC - UART HWFC for data mode

Could someone verify the syntax to disable HWFC?

Thank you,

[Simon]

To disable flow control, make sure hw-flow-control is not present in the dts node of the uart instance you're using (remove it from nrf9160dk_nrf9160ns.overlay), you can confirm this by checking the file build/zephyr/zephyr.dts. Earlier flow control was configured through Kconfig, but now it is done through dts/overlay-files.

I'm not sure what will happen if you set CONFIG_SLM_DATAMODE_HWFC=n and enable flow control in the device tree, but I can see that it will fail if the opposite is the case: https://github.com/nrfconnect/sdk-nrf/blob/v1.5.1-rc1/applications/serial_lte_modem/src/slm_at_tcp_proxy.c#L862-L865.

Best regards,

Simon

[upswing]

I did update the overlay file last night and removed the offending configuration settings.  The application compiles but I still have to validate the solution.  I  will respond with the results later today. 

Thank you for your help