Review on 🌡️ Gowoops 2pcs DHT22/AM2302 Arduino Raspberry Pi Digital Humidity Temperature Sensor Module, DIY Temp Humidity Gauge Monitor for Electronic Projects, SHT11 SHT15 Replacement by Jared Winebrenner

The sensor is supplied without documentation. If you write your own code instead of using one of the Arduino or C libraries available on the internet, you should be ready to do some detective work. Not all DTH22 specifications are created equal. They have been translated from Chinese. Find one that clearly explains the waveform of the data (no manual notation). The numerical format of the sensor output is also not clear from the data sheet. The best source of information I found on sensor output was an article in Nuts & Volts Magazine (NVM). Find the NVM article on DTH22. Armed with this information and a fast microcontroller, this is an easy-to-use sensor. It works for me with a PIC18F26K22 clocked at 16MHz. The code was written in PBP3.