The DHT22 is a remarkable capacitive humidity - sensing digital temperature and humidity module. It outputs calibrated digital signals for accurate temperature and humidity readings. Using dedicated digital module collection technology and top - notch temperature and humidity sensing technology, it guarantees high reliability and long - term stability. This sensor combines a capacitive humidity component and a high - precision temperature measurement device, connected to a high - performance 8 - bit microcontroller. It features excellent quality, fast response, strong anti - jamming ability, and high cost - effectiveness. With a standard single - bus interface, it's quick and easy to integrate into your system. It has a small size, low power consumption, and can transmit signals up to 20 meters, making it perfect for all kinds of applications, even the most demanding ones. The DHT22 offers higher precision and can replace the expensive imported SHT10 temperature and humidity sensor, meeting high - end environmental temperature and humidity measurement needs. When combined with a special sensor Arduino expansion board, it can easily achieve interactive effects related to temperature and humidity perception. Note that the DHT22 digital temperature and humidity sensor is designed for analog sensor interfaces. It uses the analog port as a digital one without occupying the original digital ports of the Arduino. The sensor can convert analog functions to digital ones for use on digital ports. Specifications include a supply voltage of 5V, a temperature range of - 40 - 80°C with 0.1°C resolution, a humidity range of 0 - 100%RH with 0.1%RH resolution and ±2%RH error, a wiring map of VCC, GND, S, and a size of 38 x 20mm (1.50x0.79'). Documents available are the product wiki, manual, schematic, layout, and library. The shipping list includes one DHT22 sensor and one analog sensor cable.
Using the DHT22 temperature and humidity sensor is quite straightforward. First, connect it according to the wiring map (VCC, GND, S) to your power source and the device you want to use it with. If you're using it with an Arduino expansion board, you can achieve some neat interactive effects related to temperature and humidity. Just make sure to use the analog port as a digital one as described. When it comes to power, it needs a 5V supply voltage. As for the temperature and humidity measurement, it can handle a wide range. The temperature range is from - 40 to 80°C, and the humidity range is from 0 to 100%RH. Remember, the resolution for both temperature and humidity is 0.1, and the humidity error is ±2%RH. Regarding maintenance, keep it in a clean and dry environment. Avoid exposing it to extreme conditions like very high heat or excessive moisture that could damage the sensor. Also, refer to the product wiki, manual, schematic, layout, and library for more in - depth information and troubleshooting.
