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DHT22/AM2302 sensor is used to measure air temperature and humidity with increased accuracy. The sensor consists of a capacitive humidity sensor and a thermistor. Also, the sensor contains a simple ADC for converting analog values of humidity and temperature into digital form. Data transmission is carried out over one wire using the proprietary WIRE protocol. It can be used in devices based on Arduino, AVR, PIC, ARM and other microcontrollers. To work with Arduino, there are ready-madelibraries.
From sensorsDHT11features greater accuracy of readings and an extended measurement range, the wiring diagram and protocol are identical.
Main characteristics:
Supply voltage: 3.5 ... 5.5 V
Temperature range: -40 ...+80°С
Temperature reading error: ±0.5°С
Humidity range: 0 - 100%
Humidity reading error: ±2%
Sensor polling rate no more than 0.5 Hz (no more than once every 2 seconds)
Dimensions 15.1mm x 25mm x 7.7mm
Built-in ADC
Data transmission over one wire
Analog DHT22
Weight: 2.4g
Contact diagram:
Pin assignment:
SDA - contact for data exchange between sensor and microcontroller
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The data presented in the product description are for reference only and may differ from those indicated by the manufacturer.
To carry out technical calculations and obtain the exact parameters of the goods, use the datasheets from the manufacturer's website.
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The data presented in the product description are for reference only and may differ from those indicated by the manufacturer.
