When i connect one P115 to heater, it was working for a week. Then something happened i do not know, i can start and stop from app and can see the current power consumption but i did not see "it is on" from main screen and detail screen. I click open button than it turs to "on" but after few seconds it turn back to "close" display.

I delete and install 3 times.

I changed the internal ip adress 

I changed every adjustment from option section of app

I have 3 more P115 when i tried other ones it is working 

The worrking ones the firmware is same

but not working. I can not see that "it is on" and can not see the hourly and daily power consumption.

How can i solve i don't know.

Thanks for your help