watching serial traffic between 2 devices

Projects Interfacing w/ Software on the Computer
1

Trying to google what I am asking for is proving difficult. So if there is something on the forum already, I apologize.

I have to troubleshoot serial communication between 2 devices (ESP-07 and Nextion HMI) I have 2 usb-serial converters plugged into my computer. I would like to have them communicate with each other and log "who said what" on my pc.

I am handy with c# so if there isnt something, maybe I can whip up something.

2

you use two more USB serial devices

  1. connect the Rx line of one to the Tx line of the ESP-07
  2. connect the Rx of the other to the Tx line of the Nextion HMI.
    Using C# SerialPort components open the two associated COM ports to monitor the traffic flows