I’ve connected a NodeMCU esp8266 to my ST hub (many thanks @ogiewon!) and added it as a device on my ST iOS app. The two thermostats are showing a temperature of -196.6. Any suggestions on how I can adjust the base reading so it matches up with the correct temperature? Thanks for the help.
If you’re reading -196.6, I believe you may have a wiring problem with your sensors. What type of sensors are you using? Can you share a picture or diagram of how you have things wired? Also, if you can share your Arduino sketch, that would help to diagnose the problem as well.