I was having huge problems on my new installation getting the sunsynk WiFi logger to connect - It kept saying Connection Status: DNS Lookup Failure.
The vendor was very keen to blame my WiFi.
SunSynk today said they have a fix...
connect your phone wifi to EAP-xxxxx
Input the address
10.10.10.1/serverset.cgi?addr=ukiot.sunsynk.net:51100
into the address bar of the browser.
You should get a response
{
"status": "ok"
}
power cycle the dongle (unplug it for 10s)
For me it was an instant solution.
(this might be just for region 2 - Using UK servers, rather than ?China? )
Try it at your own risk, not my fault if your house blows up, or anything else happens