DHT22 - Temperature and Humidity Sensor Module
Description:
The DHT22 is a digital temperature and humidity sensor module. It's popular among hobbyists and professionals alike for its relatively low cost and ease of use. Here's a brief overview of its features and how it works:
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Measurement Range: The DHT22 can measure temperature from -40°C to 80°C with an accuracy of ±0.5°C, and humidity from 0% to 100% RH with an accuracy of ±2-5% RH.
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Digital Output: Unlike analog sensors, the DHT22 provides digital output, making it easy to interface with microcontrollers like Arduino, Raspberry Pi, or any other platform with digital input/output capabilities.
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Single Wire Interface: The DHT22 communicates over a single wire using a proprietary protocol. This makes it simple to connect to microcontrollers without using multiple pins.
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Calibration: While the DHT22 is factory calibrated, it may require occasional recalibration for precise measurements.
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Low Power Consumption: It operates on low power, making it suitable for battery-powered applications.
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Durable and Compact: The sensor module is relatively durable and compact, suitable for various applications including environmental monitoring, HVAC systems, weather stations, etc.
To use the DHT22 sensor module, you typically connect it to a microcontroller, read the digital signal, and then convert it into temperature and humidity values using the provided library or by implementing the communication protocol yourself. Libraries are available for various platforms, which simplify the process of interfacing with the sensor.
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