Serial loopback, how to get message when no data received

serialloopback.json (6.9 KB)

Hi all

I've got a simple serial loopback flow writing a string from COM1-COM2 and COM3-COM4 every 3 seconds, and sending the output from COM3 and COM4 to a TCP out node. This works fine but if I unplug one of my loopback cables I dont get any errors. In this case I want an error message to be sent to the TCP out node i.e. "COM1-2 no response"

This should be simple but I cant see how to do this for looking!

Thanks