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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,
without marking, it means that the power supply voltage is
12
V。
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）
SCL Pins are used for selection of the means of communication and I
2
C Communication
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)
