0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ← offset from beginning of message
0 1 2 3 4 5 6 7 8 9 10 ← offset from beginning of APDU
81 0A 00 11 01 04 00 05 C4 0C 0C 02 00 00 F5 19 46
bvlc------- npdu- apdu
| offset | value | meaning |
|---|
| 0 | 0x0_ | BACnet-Confirmed-Request-PDU |
| 0 | 0x_0 | X0000b = no segmentation |
| 1 | 0x0_ | max response segments accepted = unspecified |
| 1 | 0x_5 | max response APDU accepted: 5 = 1476 octets |
| 2 | 0xC4 | invoke id |
| 3 | 0x0C | Confirmed Service Choice: 0C = read property |
|
| 4 | 0x0C | context tag, length = 4 |
| 5 - 8 | 0x020000F5 | Object type(top 10 bits) = 8 (device) |
| 5 - 8 | 0x020000F5 | bottom 22 bits instance number 245 |
|
| 9 | 0x19 | context tag, length = 1 |
| 9 | 0x46 | property identifier - model-name (70) |
Resources
BACnet-Confirmed-Request-PDU