Review on 🌡️ Ubibot WS1 WiFi Temperature Humidity Sensor and Smart Monitor with External Probe Support, Alerts & History, Free IoT App/Web Console, IFTTT, Alexa, (2.4GHz WiFi – No Hub Required) by Chris Endricko

I use this product to monitor humidity and temperature when I'm not at home. I liked this product because it plugs into an outlet so you don't have to worry about running out of batteries like other similar systems (it can run on batteries too). It has a notification system that you can set up and receive email and in-app notifications for free (SMS messages cost extra). I haven't contacted support but there is no way to rate support as not applicable so I have 4 launches from it. In addition to temperature and humidity, the device measures the light level and signal strength of the WiFi connection (it will alert you if the power goes out or the WiFi goes down). The device receives and writes data frequently, but only updates its server every 15 minutes to save battery power. It's been running for a few weeks now and I've gotten a few warnings so I can say the system is working fine. I compare the readings to my thermostat which has both temperature and humidity and this unit seems to be reporting very similar readings. Would recommend if you have similar needs.