I’ve been working on this controller box for about a week. The operation of the relays seem to be very intermittent. I am using the ZUSB access to talk to the controller. Once the USB cable is connected, I can see the USB led turn ON and once 12V power is connected I can see the READY led ON.
When I send commands either using base station application or my code to the COM at the right baud rate (115200), the relay operation (click) is intermittent. It is strange because I also get a success return string when I send the command even though its not working.
170 2 1 1 174 * ON (return string)
170 2 1 0 173 * OFF (return string)
Is there a way around to troubleshoot this issue or catch the fail when its not working. Please advise.