Review on 🌡️ 2PCS HiLetgo DHT22/AM2302 Digital Temperature and Humidity Sensor Module - Arduino Compatible Temperature Humidity Monitor Sensor, Suitable for DIY Electronic Projects by Gus Gutierrez

I have bought two of these sets, they are fairly consistent in the stated values. And they are comparable to DHT22 sold by others. Which is good because I use several of these throughout my house. And the readings are consistent across individual sensors, and the reported values are reasonably consistent too. The supply voltage is crucial for these sensors, regardless of the manufacturer. The part (DHT22/AM2302 without circuit board) is designed for 3.2 or 3.3 to 5 volts. If you're using one from an ESP-12E or other MCU with a built-in 3.3V regulator, it'll likely work without problems. And at 5V they work without problems. However, I am running them from an ESP-01 board and an external LM1117 regulator board, with the regulator being part of the SMT. There I found that the regulators could be turned off and provide up to 3.0 volts. A NOTICE. The ESP-01 supply voltage is specified in the range of 2.7 to 3.6 V or 3.7 V depending on the information source. Depending on the exact supply voltage, the device either doesn't work at all when using the Arduino library or reports "NaN" intermittently. BSS138 circuit to handle the 3.3V VS 5V sides of the circuit. This worked very well and the "test" device ran 24/7 with the modified circuit for 3 months with no read errors. Before that, the error rate was between 20 and 50%. All in all, this is a great sensor for most hobbyist applications. It has the necessary resistor and capacitor already on board and the lead wires are a nice touch. However, for my application I would prefer male/female wires over female/female wires. I will buy them again the next time I need them.