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Location:HKB-08B Blood-Pressure Module

HKB-08B Blood-Pressure Module

HKB-08B Blood-Pressure module is made for arm type measuring method, the product has the characteristics of easy to use, high measuring accuracy, can be widely used in various types of Blood-Pressure test system.
Communication Protocol:
1.   Hardware interface: TTL232.
2.   Baud: 57600 bps. Data format: 8bit data, 1bit stop, no verify.
3.   Frame:
Head Fixed:0xFF、0xCD
Data length The byte of the length, parity, commands, parameters
Check The low byte of the length, parity, commands, parameters
Command or return  
Parameters  
……  
CKSUM Check all.
 
4.   Communication Commands
a)  Sleep the sensor
Master -> Sensor: 0xFF 0xCD 0x03 CKSUM 0xAB
Sensor -> Master: 0xFF 0xCD 0x03 CKSUM 0x5B
b)  Wake up the sensor
Master -> Sensor: 0xFF 0xCD 0x03 CKSUM 0xAA
Sensor -> Master: 0xFF 0xCD 0x03 CKSUM 0x5A
c)  Start measurement
Master -> Sensor: 0xFF 0xCD 0x03 CKSUM 0xA0
Sensor -> Master: 0xFF 0xCD 0x05 CKSUM 0x54 QYH QYL
Result: 0xFF 0xCD 0x08 CKSUM 0x55 SSYH SSYL SZYH SZYL XL
PS:  QYH QYL: Air pressure
              QYH.4=1 Indicates heartbeat signal is detected
              QYH.4=0 Indicates heartbeat signal is not detected
     SZYH SZYL: Diastolic blood pressure
     SSYH SSYL: Systolic blood pressure
              SSYH.7=1 Indicates arrhythmia
              SSYH.7=0 Indicates OK
d)  Stop measurement
Master -> Sensor: 0xFF 0xCD 0x03 CKSUM 0xA3
Sensor -> Master: 0xFF 0xCD 0x03 CKSUM 0x53
 
PS: Error report: 0xFF 0xCD 0x04 CKSUM 0x56 X
    X=0: Measuring less than effective pulse.
    X=1: The airbag is not tied up.
    X=2: Measurement results invalid.
    X=3: Overvoltage Protection.
    X=4: Too much intervention

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