Temperature and Humidity Capacitive Digital AM2302 DHT22 Sensor

Temperature and Humidity Capacitive Digital AM2302 DHT22 Sensor - The AM2302 is a wired version of the DHT22, in a large plastic body. It is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). Its fairly simple to use, but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so when using our library, sensor readings can be up to 2 seconds old.

Simply connect the red 3-5V power, the yellow wire to your data input pin and the black wire to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin.

Compared to the DHT11, this sensor is more precise, more accurate and works in a bigger range of temperature/humidity, but its larger and more expensive

There is a 5.1K resistor inside the sensor connecting VCC and DATA so you do not need any additional pullup resistors

What is Temperature and Humidity Capacitive Digital AM2302 DHT22 Sensor

The digital temperature and humidity module DHT22, also known as the AM2302 capacitive humidity sensing module, is one that includes the component that has been adjusted for the output digital signal of the temperature and humidity sensors.

An easy, affordable digital temperature and humidity sensor is the DHT22. It measures the humidity in the air using a thermistor and a capacitive humidity sensor, and it outputs a digital signal on the data pin (no analog input pins needed). Although very easy to operate, data collection needs precise timing.

What does a temperature and humidity sensor do?

A temperature and humidity sensor is an affordable, sensitive electronic gadget that can measure, record, and report both temperature and moisture. the ratio of the maximum quantity of moisture at a given air temperature to the overall amount of moisture.

What does DHT22 measure?

The DHT22 temperature and humidity sensor measure temperature using a thermistor and humidity with a capacitive humidity sensor.

What is the advantage of Temperature and Humidity Capacitive Digital AM2302 DHT22 Sensor?

Temperature sensors work by sending electrical signals that include readings. By detecting the voltage across the diode terminals, sensors are made of two metals that produce an electrical voltage or resistance whenever there is a change in temperature. The temperature rises in line with an increase in voltage.

Hygrometers, a type of humidity sensor, are also referred to as humidity sensors. The real humidity level in the air at any time or place may be found out with this device. These devices are widely used in situations where the air quality is poor or when managing the air quality is necessary for a number of reasons.

QUICK SPECS:

• Low cost
• 3 to 5V power and I/O
• 2.5mA max current use during conversion (while requesting data)
• Good for 0-100% humidity readings with 2-5% accuracy
• Good for -40 to 80°C temperature readings ±0.5°C accuracy
• No more than 0.5 Hz sampling rate (once every 2 seconds)
• Body size 27mm x 59mm x 13.5mm (1.05" x 2.32" x 0.53")
• 3 wires 23cm long (9")
• 27mm wide x 58.75mm tall x 13.30mm deep