Review on 🏡 Enhance Your DIY Smart Home: Sonoff TH16 WiFi Smart Temperature and Humidity Monitoring Switch with SI7021, Compatible with Alexa and Google Assistant by Josh Cox

This is a really nifty device that lets you control temperature and humidity (and toggle a switch based on trigger level). I couldn't get good reception with the device I selected earlier, but I was able to connect reliably with this one. I hooked it up to a 12 volt transformer wired to a red light to let me know if my pumping station goes below 50F. Be warned, this is not a plug and play device - you must be comfortable using it with wiring. I used cable from a former network switch (you can also use a lightweight extension cord) to get power. You can use the other end of the cable to connect and power the device. Just make sure the wire size is right for the device and load.