Thank you for your reply. I am sorry, but I am a relative NOOB. How would I send the serial command over WIFI? I have done some googling and forum searching, but I have not found a definitive answer. Appreciate any assistance.

The relays get there power from an external 5v power supply. The power is not the issue.

I have used the esp8266 module from to trigger another relay I own, also 5v, and it worked without an issue.

I bought two of these: http://www.ebay.com/itm/152345540675?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT I was able to get the ESP Easy 120 firmware on both of them without any issues. The firmware appears to be working correctly and I can control the Wifi LED light by using http:/...

I am not sure what is going on with this relay board. It is exhibiting a constant electronic clicking. With or without the esp8266 module plugged in. Any ideas? See the video here.
https://youtu.be/5Le9kNT_Bm4

Did you ever have any success figuring out how to control the relay on this board?