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广州奥松电子有限公司 电话：020-36042809 / 36380552

www.aosong.com

DHT12 The data bus output 40 Data, continue to output low level 50µs Free bus to enter State

after. The same time DHT12 An environmental temperature and humidity data, and records the

data automatically after entering hibernation.

◎Typical circuit

图 19 Typical circuit diagram

Microprocessor and DHT12 Connections on a typical application circuit shown in the figure,DATA

After pulling on the microprocessor I/O Connected to the port.

1.Typical application circuit recommended cable length is shorter than the 20 Meter use 5.1K

Pull-up resistor, is greater than 20 Meters lower the pullup resistor value according to actual

situation.

2. Each numerical readout of temperature and humidity is the result of the last measurement,

to get real-time data, need to read twice in a row, but not recommended to read several times in

succession, each read sensor spacing is greater than 2 Seconds to obtain accurate data.

◎Peripheral read flow charts

DHT12 Sensors read the single bus flow chart shown in the following figure, while the company

also provides a C51 Reading the code to download customer, please visit the company's website

(WWW.AOSONG.COM) To download, no reference code here.