I managed to set up the Controller to the App after several attempts. I discovered my phone (One Plus 10 Pro) would not find any WiFi connections in the App during set up. Not sure why but I was able to install the App on an older phone, log into my account and find my Wifi connection along with other nearby connections. I then successfully connected my heat pump to my App account on the older phone. I could then log into my App account on my One Plus phone and access the controls. No need to set the Heat Pump Smart setting either to 'Smart' which is mentioned in some older Aqua cal online videos. The D port connection in the heater could be better identified. It is the bottom left port. Feed in the cable before gently removing the green cover and connecting the 4 wires in the correct positions, then carefully push on the green connection.

Purchased this product to control my heat pump for my rental property. Had an issue connecting to my wifi network. Called tech support who quickly diagnosed that my firmware predated a google security update that was preventing the device connecting to the web app. They then scheduled a tech to visit my property and replace my device with a newly flashed device. Superb customer service! The device works perfect, intuitive controls and a nice look.

The media could not be loaded. Super easy install (heat pump). Literally take cover off, remove control board cover, use pliers to gently remove port D. Insert wires based on instructions and tighten down. Reinstall port and covers. When configuring, make sure you are NOT connected to your home wifi as you will need to connect to the devices wifi. Also, make sure you allow the cloud service so you can access from anywhere you have internet (couple of Amazon reviews were negative because they claimed you couldn’t control this outside of home wifi). Again, this was a very easy install and a great accessory to have so anyone in my family can control our pool heater.

This controller sure does make monitoring the pool heat pump and scheduling it for energy efficiency easy. For example, I have it run only Thu-Sun because I don't usually use the pool on weekdays. I can do this both at home, connected to my own WiFi, and when away, which suggests that some of the earlier problems have been resolved.Installation was straightforward, although initial WiFi connection required more than a few tries. The app is telling me that the device's firmware needs to be updated, but I have not yet been successful there.

Easy install. Easy interface. Easy to control our heater.