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Humidity and Temperature Sensor - DHT22

Product Code : RB-Spa-521

 In stock

Low cost with a single wire digital interface
Calibrated and doesn't require extra components
Input: 3.3-6V
Measuring current: 1-1.5mA
Standby current: 40-50uA
Humidity: 0-100% RH
Temperature: -40º to 80ºC (+-0.5ºC)
RH accuracy: +-2%
RoHS compliant

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About this product

Description

Low cost with a single wire digital interface
Calibrated and doesn't require extra components
Input: 3.3-6V
Measuring current: 1-1.5mA
Standby current: 40-50uA
Humidity: 0-100% RH
Temperature: -40º to 80ºC (+-0.5ºC)
RH accuracy: +-2%
RoHS compliant

Supplier Product Code

SEN-10167

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Reviews

Reviews Summary

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Customer Reviews

Good, but weird custom protocol

Review by Philippe
General

The device itself is good and responsive, but the protocol they used to capture data from it relies on timing pulses, similar to morse code. Never saw anything like that before and for Linux based boards (rpi and chip), it is not trivial to acquire data reliably. This is neither I2C nor SPI, nor UART, nor 1wire. I think a kernel driver would be required to reliably take measurements from this.

(Posted on 10/21/17)

one wire for data, but not 1-wire

Review by Jeff
General

Easy to use. Uses an interface similar to 1-wire protocol but not compatible. The device is not addressable so you cannot sting more than one together on a bus.

(Posted on 5/25/17)

standard device for temperature and relative humidity

Review by David
General

This is the standard sensor for measuring temperature and relative humidity with an Arduino. This I2C device requires a software library, readily available online. The same library will also support the DHT11 sensor, which is less expensive, but less accurate and with a smaller relative humidity range. It is unknown how either of these devices will perform over long period of time, especially if they are used outdoors.

(Posted on 11/13/15)

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