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Mastering the Raspberry Pi by Warren W. Gay

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CHAPTER 22

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DHT11 Sensor

The DHT11 humidity and temperature sensor is an economical peripheral manufactured by D-Robotics UK (www.droboticsonline.com). It is capable of measuring relative humidity between 20 and 90% RH within the operating temperature range of 0 to 50°C, with an accuracy of ±5% RH. Additionally, temperature is measured in the range of 0 to 50°C, with an accuracy of ±2°C. Both values are returned with 8-bit resolution.

Characteristics

The signaling used by the DHT sensor is similar to the 1-Wire protocol, but the response times differ. Additionally, there is no device serial number support. These factors make the device incompatible ...

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