Suntouch smart connect Thermostat WiFi Issues


I am not sure if this is correct area to post this question but suntouch doesn’t have any community site. Basically I have the Sunstatconnect WiFi Heating theromostat and few months back Wifi started blinking, it would come on and off and make tripping noise as well. If you turn off the WiFi feature the screen behaved properly and would to to sleep mode accordingly. I called the company and got the replacement but this new one is behaving the same way and it won’t even connect to the server for the registration. I know it is not a firewall issue as other devices are fine and connected to internet. I even allowed any any from untrust to any.

Wondering if someone owned this product saw a similar behavior. Eventually the goal was to integrate this with smarthings hub