The device ONLY supports 2.4GHz Wi-Fi router!
Please follow the steps to pair the temperature controller with your phone.
I love the thermostat just not too crazy about the fact in order to use app it only supports 2.4 Ghz and I have a 5Ghz so I can’t use app or connect to my WiFi
Bought for precision in running heaters in 180g reef tank, so as to not have aquarium chiller and heaters competing against each other constantly. Being able to set this within a tenth of degree keeps heaters and chiller balanced. The directions are not user friendly, had to watch a video. Controller is amazing, running 2/300w finnex heaters on it.