Vaisala GMP231 - Manual (Page 62)

User's Guide _______________________________________________________________________
60 ___________________________________________________________________ M211501EN-C
Example: Read CO
2
Measurement Result
Table 23 Get_Parameter Invoke Message Example
Message Bytes (hex) Content
12 I
2
C address
81 Get_parameter command
09 Device address
06 Frame length
0A CO2 Parameter ID
AA CRC high
9F CRC lo
Table 24
Get_Parameter Response Message Example
Message Bytes (hex) Content
13 I
2
C address
00 Status byte (no errors, ACK)
81 Get_parameter command
09 Device address
0B Frame length
0A CO2 Parameter ID
69 CO2 value 653.6314 ppm
68
23
44
75
CRC high
7D CRC lo