Vaisala HMM105 - Manual (Page 15)

Chapter 2 _______________________________________________________________ I2C Interface
VAISALA ____________________________________________________________________ 13
Example: Read RH Measurement Result
Table 15 Get_Parameter Invoke Message Example
Message Bytes (hex) Content
2F I 2 C address
81 Get_Parameter command
2F Device address
06 Frame length
4F RH Parameter ID
6A CRC high
D4 CRC lo
Table 16 Get_Parameter Response Message Example
Message Bytes (hex) Content
2F I 2 C address
00 Status byte (no errors, ACK)
81 Get_Parameter command
09 Device address
0B Frame length
4F RH Parameter ID
D4 RH value 14.43086624 %RH
E4
66
41
85 CRC high
6A CRC lo