Gets or sets the device ID. Device ID is 15 bits starting at second bit of SECS-II header.
For HSMS data message following header structure is used.
| 1 | Session ID |
| 2 |
| 3 | W | Stream |
| 4 | Function |
| 5 | P type |
| 6 | S type |
| 7 | System bytes |
| 8 |
| 9 |
| 10 |
For HSMS control message following header structure is used.
| 1 | Session ID |
| 2 |
| 3 | |
| 4 | |
| 5 | P type |
| 6 | S type |
| 7 | System bytes |
| 8 |
| 9 |
| 10 |
Persistent property.
Device ID and session ID are almost same, but device ID is 15-bit, where session ID is 16-bit.