SONOFFSmart Temperature and Humidity Monitoring Switch THR320 with Temperature and Humidity Sensor THS01, 2.4ghz WiFi Smart Switch with Temperature and Humidity Sensor Compatible with Alexa, 20A

I purchased the model with the display screen and with the rj9 humidity and temperature sensor. I'm using it in a greenhouse to help regulate the temperature on these hot days. I have the switch output connected to a trailing socket, with a fan plugged in to the socket. On the Ewelink app it shows the live temp and humidity and you can either set it to manual on/off mode, or auto mode. In auto for example I can set my fan to come on at 25 degrees and off at 22 degrees. It also shows you graphs of previous temp and humidity, every hour, and allows you to download csv files with the details. You can also set up scenes in Ewelink with "if" statements - for example if the temperature goes over 30 degrees, send a push notification.Obviously you need to be able to pick up a wifi signal in your greenhouse for it to work.The screw wire terminals seem pretty sturdy and it even comes with a handy mounting bracket.I've used ewelink products before, mostly the sonoff basic switches, and they have worked well for years, so I'm pretty confident that this humidity monitor will do likewise.

We had a heating control issue that seemed to baffle our plumber. Our 'uncontrolled' sold fuel heat source is connected to a thermal store. It had been set up so that when the store reached it's high limit temperature, a mechanical stat would turn on the heating pump & diffuse excess heat through the radiators. However, mechanical high-limit stats turn 'off' when the temperature is reached.Reading reviews of this product, we doubted very much that it would solve the issue. However, we are proved wrong & are more than satisfied. The new firmware version 3.50 (June 2021) not only allows the switch to automatically turn on/off at your setting but allows an on/off override. Controlled via the eWeLink app, it also connects to Alexa & Google WITHOUT any flashing of firmware. 'Alexa, heat pump on' ...is now an easy option...The only issues, so far, are the previously noted 3.5mm jack port for sensor attachments. If not fitted properly, the loose jack will short out the wifi connection. Rather than drilling out the port ...I found a firm push snapped the jack into place. This may be deliberate & not a design fault ...as there is no likelihood of the sensor falling out!As a new installation, only time will tell if this control suitable for long term use. At the price, I felt it was a good value solution to the problem.

Bought this TH16 switch with a DS18B20 sensor to replace the broken mechanical thermostat controlling the heating coil in my greenhouse propagator.An initial test in iced water showed the sensor was reading 0.8°C high and in boiling water 0.3°C high. Testing with the sensor alongside a reference thermometer of known accuracy showed the sensor generally read about 0.5 – 0.9°C high across a range of temperatures. It would be handy if there were a calibration function in the eWeLink Device Settings to correct this, but unfortunately there’s not so if you’re fussy like me this has to be done manually by offsetting the set point (minus one star).As a trial, I aimed for a temperature of 22°C so with the above errors in mind set the on-temperature in eWeLink app at 22.5°C and off at 22.6°C. I left the propagator running over night with the sensor alongside a Bluetooth sensor calibrated with my reference thermometer.The eWeLink app does not store date but it is possible to look at data over time by linking to an app called SmartThings. Unfortunately there is no provision in SmartThings to download this data (minus a one star if I were reviewing this app), so it has to be done manually which although is a bit tedious I thought it would be interesting just this once.The results from the Sonoff sensor showed switching on at 0.1 – 0.2°C below the on set-point and off at 0.3 - 0.4°C above the off set-point (why these change over time I have no idea). This, with (I assume) some latent heat from the coil causing the temperature to increase slightly after switching off, gave a control temperature of 22.9°C +0.8/-0.6 (see graph).Comparing this to the data from the Bluetooth thermometer (which is downloadable as a csf file) I got a control range of 21.7°C +0.6/-0.9, so I guess this means to get a temperature of 22°C, I need to increase the on-temperature to 22.8°C and the off to 22.9°C which I will do and see what I get.After all that, I have to say the sensor and switch is probably more accurate than the mechanical thermostat it replaced and is accurate enough for most purposes (including mine) and is good value for money.

I've used this to control the extraction fan in our ensuite bathroom, which has no window and has suffered from mould due to humidity (Fan with timer delay is pointless). Took a couple of weeks to get the high/low humidity thresholds set, but it works a treat. It would be nice if there was an option for a white sensor, that's my only negative.

Happy with purchase. Hard to finde. Lucky to get

Used to boost Hot Water when solar insufficient via a Dimplex Free-E unit so only using signal current. Needed to box terminals in so notched out back of a 100x100x50 junction box to trap unit to wall, allowing use of manual override/pairing button and sight of LEDs.Temperature probe is only 0.5m long so I spliced the 3 wires (in box) to my old 1m long probe after removing original plug from that.Software now allows you to set operating times with different temperature cut-offs as required, with no lose of timings during power cuts unlike the Free-E unit.