The DHT22 is a reliable sensor for determining temperature and humidity. Since the sensor can be operated with 3.3V as well as 5V, it is suitable for connection to all common boards such as RN-Control, Raspberry Pi and all other microcontrollers.
Besides the operating voltage, only one port has to be connected to the sensor.
The output is serial as a digital bit sequence. Thus, the sensor is ideal to monitor the indoor climate or to build a weather station.
Particularities
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Compared to the DHT11 temperature sensor, this module enables higher precision in temperature and humidity measurement.
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You do not need any additional components to be able to integrate the sensor into your projects.
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Thanks to its small dimensions, low power consumption and long transmission distance (100 m), the AM2302 is suitable for all kinds of harsh operating conditions.
Technical specifications
| Model | DHT22 |
| Dimensions | 15 x 25 x 7.7mm |
| Power supply | 3.3 - 6V DC |
| Output signal | Digital signal via single bus |
| Sensor element | Polymer moisturizer capacitor |
| Measurement period | 2s |
| Accuracy | +-0.5Celsius / +-2%RH (max +-5%RH) (temperature and humidity) |
| Resolution | 0.1Celsius / 0.1%RH (temperature and humidity) |
| Long -term stability | +-0.5%RH/year |