DHT22 データシートの表示（PDF） - Unspecified

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DHT22

Digital-output relative humidity & temperature sensor/module

Unspecified 

Aosong Electronics Co.,Ltd

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Your specialist in innovating humidity & temperature sensors

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Start transmit 1bit data

Start transmit next bit data

26-28us voltage-length means data "0"

Host signal

Sesnor's signal

Single-bus signal

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Step 3: DHT22 send data to MCU

When DHT22 is sending data to MCU, every bit's transmission begin with low-voltage-level that last 50us, the

following high-voltage-level signal's length decide the bit is "1" or "0".

Check bellow picture for step 3:

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Thomas Liu (Business Manager)

Email: thomasliu198518@yahoo.com.cn

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