I received one of these in last week, and while only a iPhone and Android client have been written for them, I got the documentation from China, and with much packet captures, have gotten it working from a PC, and now in Domoticz. The functionality within Domoticz is actually via a Node.Red ...

What goes in this entry of the config json?

"RequestString" -> SNMP query string for value to be returned from router (mandatory, script will exit without it)

From looking at the script, it appears just to be doing a snmp walk, so there should be no particular requeststring.