I think you may have the best solution so far? I am looking at the H801 that uses the ESP8266 with @erocm1231 code and basically see if I can pulse the 2 Channel Relay that way?
UPDATE: I did some testing and this setup works like a champ. His code allows for customized programming that is accessible via virtual switches. I just set a program for a short 1/2 second pulse to trigger the relay momentarily and control the virtual switch from SmartThings to initiate the program.