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图 2：25 ℃时 DHT12 Relative humidity maximum error 图 3: Temperature sensor temperature Max

errors

Six, electrical characteristics

Electrical characteristics, such as energy consumption, high and low level input and output

voltage, depending on the power supply. Table 3 Details DHT12 The electrical characteristics,

表 3： DHT12 DC characteristics.

Seven, interface definition

7.1 DHT12 Pin assignments

表 4

： DHT12 Pin assignments

图 4：DHT12Wiring diagram

7.2 Power supply pins (VDD GND）

DHT12 The supply voltage range 2.7V - 5.5V。

7.3

Serial clock input (SCL）

clock line. Dang SCL After power remained low, indicating that the user select a single bus

1

低电平输出电流。

2

表示上接电阻。

PIN

The

name

描 述

1

VDD

Power supply (2.7V-5.5V)

2

SDA

Serial data, bi-directional

3

GND

地

4

SCL

Serial clock input(Single bus grounding)