HiLetgo 2pcs DHT22/AM2302 Digital Temperature And Humidity Sensor Module Temperature Humidity Monitor Sensor Replace SHT11 SHT15 for Arduino Electronic Practice DIY

No issues, checked it against a digital thermometer and a home weather station and the sensor is spot on.

I ended up buying two different temp / humidity sensors on Amazon. The first one, a sensor sold by WWZMDiB on Amazon (the one on the left in the picture) worked out fine for my ESP 8266 project, but the humidity readings seemed to be about 5% off compared to my "Airthings" radon/humidity/temp readings. The HiLetgo DHT22 in contrast gave me readings that exactly matched my "Airthings" and another table top temp / humidity device. I don't have any way to prove which one was right other than thinking if 3 devices agree, I have a better chance of being close to the actual value.You can see in the picture that the HiLetgo is just neater. The plastic enclosure around the sensor just looks crisp on the HiLetgo, but not quite as good on the other. Solder joints were just a tad cleaner on the HiLetgo. The HiLetgo was about twice the price, but I think it is worth paying a little more for a sensor that I am more confident in using. Both units came with hookup wire which made connecting them to the ESP 8266 a breeze. Both claim the same specs on accuracy. The "WWZMDiB" was cheaper and performed okay, just seemed to be a step down from the HiLetgo.

Have this sensor running with a raspberry pi 5. I find the values are within 1-2% in temperature and humidity compared with the values from my aranet4, I'm actually impressed.The python software available online to interface with the device is easy to use. Haven't had issues with it so far.

These are nice quality modules, the white molded protective housing around the sensor is much better than than others I've used, it has zero flash partially blocking the airflow (like many other cheaper models have) and sharp looking laser print of the model number an a serial number.These do cost a little more than others but they look so much better quality, for me it's always been worth the extra $$ to buy from this supplier - HiLetgo vs the many other cheaper but dodgy looking equivalents out there.Overall these are weird modules to mount and work with because the white plastic sensor housing is attached to the PCB by its four wires only so can bend away from the PCB easily yet there's another mounting hole in the plastic housing at the other end - it can be glued down in place but why should we have to do that. I'd prefer a different PCB layout where the whole module is smaller and neater. The whole thing doesn't need to be this long and cumbersome, I mean there's only a couple of components on the PCB other than the sensor itself. You can easily cut off the protruding housing mounting hole flange if you want. This is more design feedback for the supplier than a review I suppose.These are by far the best performing Temp/humidity sensors I've found for a relatively reasonable price, I'll buy them again without hesitation.

I'm a little new to the world of ESP and this was my first attempt to add something to my Atom Lites. But boy was it easy. I connected 3 Dupont wires from this to 5V, GND, and a GPIO pin on the Atom and was off to the races. Just added a handful of lines of YAML to ESPHome on Home Assistant and the sensors were created. Literally a 5 minute thing, plug and play - no resistor.In terms of accuracy, I have this and a Govee BLE an inch apart on my desk for a few hours and the Govee says 70.9 F and this is putting out 70.9 F. Govee humidity is 38% and this is 39%. If they aren't accurate, well they are identically inaccurate - and I think that is unlikely.Certainly you can find alternatives for a few dollars less, but I wanted no fussing and this delivered.

Arrived promptly and work as advertised with my Pi!!

Wanted to set up some temperature sensors in various rooms of the house for Home Assistant. These worked great! I don't have some known good thing to benchmark them against, but they all seem to agree with my perception every time I've checked them. Will probably get some more for other rooms!

I have to rate this as one star because this sensor did not work.This was supposed to be used to control a relay for a small cooling fan with my Arduino Mega, however, the DHT22 was DOA. The plastic shield is so flimsily mounted to the board that I think it could have been damaged in transit (although it was well packaged), or damaged during hook up. I used the correct libraries and testing code, but continually received "DHT22 Not Found" messages. I also ensured my wiring was correct. I would have loved to give this a higher rating, but I had to put the project on hold until I figure out another alternative.