Vaisala HMM105 - Manual (Page 13)

Chapter 2 _______________________________________________________________ I2C Interface
VAISALA ____________________________________________________________________ 11
Commands
Get_Interface_Version
The Get_Interface_Version command (ID 80h) reads the interface
version information. Recommended for verifying version compatibility
before reading or writing parameters.
Table 11 Get_Interface_Version Invoke Message
Message Segment Length Content
I 2 C address 1 byte I 2 C address (write)
Command ID 1 byte Always 80h
Device address 1 byte See Table 5 on page 4
Frame length 1 byte Always 05h
Checksum 2 bytes See section Checksum on page 9
Table 12 Get_Interface_Version Response Message
Message Segment Length Content
I 2 C address 1 byte I 2 C address (read)
Status 1 byte See section Status Byte on page 9
Command ID 1 byte Always 80h
Device address 1 byte See Table 5 on page 4
Frame length 1 byte Always 0Ah
Data 1 byte Device version
1 byte Protocol frame version
1 byte Command set version
1 byte Parameter set version
Checksum 2 bytes See section Checksum on page 9