HP01-JK Datasheet, PDF (4/7 Pages) List of Unclassifed Manufacturers – Low voltage, low power

Hope RF
Example:
BAROMETER MODULE
HP01-JK
Version2.3
D1(P0)=30000
D2(P0)=4100
TCS=-0.55
SNS=27
(obtained after power up reading: D1)
(obtained after power up reading: D2)
(nominal module value from this data sheet)
(nominal module value from this data sheet)
D1=30036
D2=4107
(current pressure AD reading from module)
(current temperature AD reading from module)
dUT = 4107-4100 = 7
dTCS=-0.55*7=-3.85
dUP=30036+3.85-30000=39
P2=39/27=1.44
P=1013.2+1.44=1014.6
Serial Interface
The I²C interface is used for reading measurement result from AD conversion:D1 and D2.
Reading Temperature and Pressure value:D1,D2
AD chip I²C address is set to 0xEE (device write address), 0xEF (device read
address). In order to get the AD value D1 and D2, you have to follow the following
timing sequence:
Pressure Measure:
S 11101110 A 11111111 A 11110000 A P D S 11101110 A 11111101 A S 11101111 A MSB A LSB N P
Select pressure measurement
Read AD value back
Temperature Measure:
S 11101110 A 11111111 A 11101000 A P D S 11101110 A 11111101 A S 11101111 A MSB A LSB N P
Select temperature measurement
Read AD value back
S: I²C bus START (refer to AT24C02 EEPROM start command)
P: I²C bus STOP (refer to AT24C02 EEPROM stop command)
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