Review on Enhance Your Smart Home with Emerson Sensi Wi-Fi Smart Thermostat - Alexa Compatible, Energy Star Certified by Homer Reed

This review is a bit complicated, but I recommend you read it before buying this product. Just a few notes before we get started: 1) This review covers the cooling circuit of the device; I live in a very warm climate and have not tested the heat cycle. 2) This review is for TWO different Emerson Sensi devices of the same make and model; When I first noticed this behavior I assumed it was a product defect and filed a warranty claim with the manufacturer who sent me a replacement. The same behavior was observed on both devices. Without going into the problems of owning this thermostat (and there were many), I simply present the conclusion: in order to control the operating time of the air conditioner, the Emerson Sensi firmware artificially manipulates the device. temperature sensor. Attached are three different images. Each image shows an Emerson Sensi (bottom right) and two different thermometers. The thermometer on the left has a clock so you can see the "time code" of each image. The pictures were taken when the outside temperature was about the same as the inside temperature - around 76 degrees. 1) Photo #1 was taken at 9:18 am when the air conditioner stopped working and the unit was turned off. Note that the Sensi sees room temperature as 73 degrees, but two thermometers read temperatures anywhere between 75 and 76 degrees. 2) Photo #2 was taken just 15 minutes later (9:33am) just before the air conditioning started working again. . Note that the Sensi now sees the room temperature as 75 degrees (2 degrees warmer in 15 minutes?), but the two thermometers show no temperature change. Can you say it's impossible? 3) Photo #3 was taken about 40+ minutes after #2 (10:15), just after the air conditioner finished its next cycle. Note that Sensi thinks the room temperature is back to 23 degrees, but the two thermometers show little to no temperature change from the previous shots (the left thermometer is actually up 0.4 degrees). and off again. Somehow, some "magical force" changed the Sensi's room temperature from 73 to 76, turned on the device, ran it for a few minutes, and the temperature magically dropped back to 73 and the device turned off. And all this while two independent thermometers recorded almost NO temperature changes throughout the cycle. There can only be one inevitable conclusion: the Sensi firmware manipulates the device's temperature sensor to control when the air conditioner turns on and/or off - completely independent of the "true" temperature in the room. This means that the thermostat sometimes runs the air conditioner too much and sometimes not enough. I'll post some photos of "warm days" if time permits, but when it's very warm outside the thermostat will turn off the AC well before the desired set point is reached. You may think this is good, but it makes the house very warm. Again, I tested the same behavior with two independent thermometers. Oh, and one more thing, if you read the manufacturer's response to some of the comments on this product, you'll see that they post this pre-packaged Sensi "density" message. Temperature setting range +/- 1 degree. See my drawings: if the setpoint deviation is only 1 degree (the datasheet says it should be 1.2 degrees Fahrenheit for an average refrigeration cycle) - how does Sensi's "room temp" be 73 degrees when the set temp is 76 degrees amounts to? I understand that Revain has many different products but deceptive, misleading or outright counterfeit products should be removed from the shelves. i can get my money back UPDATE 09/23/2019 As promised, I am posting a picture "hot day". As an experiment, I lowered the set temperature to 22 degrees during the heat of the day in a very warm, humid climate. Any air conditioning could barely heat the house I live in to 72 degrees. But with the Emerson Sensi thermostat - the device turned on, worked for 5-6 minutes, the temperature on the display magically dropped to 72 degrees, and the device turned off. See the last photo attached, it was taken right after the device was turned off: Note that two independent thermometers show that the temperature on the thermostat is still 77 degrees. As I said in my comment to the manufacturer, this device does NOT control temperature directly. in your house, like a regular thermostat; Instead, it attempts to control the number of on/off cycles per hour, but tricking you into thinking it's reached the desired temperature by artificially changing the output of the temperature sensor. Incredible, unbelievable, deceptive. Just know what you are buying when you choose this thermostat. In my house it is sometimes too hot at home, sometimes too cold – always – and at different times of the day. The correct temperature cannot be determined. The good news for me is that Revain is gold. I called them, explained the problem - and even though I was a bit outside of the return window, they gave me a full refund. Let me say it again: Revain is gold.