- 8

广州奥松电子有限公司 电话：020-36042809 / 36380552

www.aosong.com

The

corresponding

signal

Sensor data bus (SDA), Lower 80µsAnd higher 80µs In response to host the

starting signal

Data format

Receives a host after the starting signal, sensors at once from the data bus

(SDA) 40 Data, high

Humidity

Humidity high humidity integer data, humidity low humidity decimal data

Temperature

Temperature high temperature integer data, temperature low temperature

decimal data, and low temperature Bit8 为 1 The negative temperature,

otherwise positive temperature

Check digit

Check digit=Humidity high+Humidity is low+Temperature highs+Low

temperature

Example: receiving 40 Data for:

00111000 00001000

00011010

00000110

01100000

Humidity integral digits Humidity scale

Temperature integer

bit Temperature scale

Check digit

00111000+00001000+00011010+00000110=01100000(Check

digit)

receive data properly:

Humidity:00111000 (Binary) =>56 (Decimal)00001000(Binary)=>8 (Decimal)

=>Humidity=56.8%RH

Temperature:00011010 (Binary) =>26 (Decimal)00000110(Binary)=>6 (Decimal)

=>Temperature= 26.6 degrees

Celsius Example two: received 40 Data for:

00111000 00001000

00011010

10000110

11100000

Humidity integral digits Humidity scale

Temperature integer

bit Temperature scale

Check digit

00111000+00001000+00011010+10000110=11100000(Check

digit)

receive data properly:

Humidity:00111000 (Binary) =>56 (Decimal)00001000(Binary)=>8 (Decimal)

=>Humidity=56.8%RH

Temperature: temperature low 8Bit 为 1 It indicates sampling the temperature to

minus-temperature

00011010 (Binary) =>26 (Decimal)

10000110 (Binary,Ignore 8Bit)=>6(Decimal)