Device Info Packet
Device Info Packet Structure
| Header Info Bytes | ||||
|---|---|---|---|---|
| Field | Size (bits) | Bit Range | Description | Breakdown |
| Start Character | 8 | 0–7 | Starting character $ (ASCII value 36) | $ |
| Length | 12 | 8–18 | 2-byte length of the data following the header | |
| No of Packets | 5 | 19–23 | NO of data Packets (always 1 with device info) | |
| IMEI | 50 | 24–74 | Unique device identifier | |
| Packet Type | 5 | 75–79 | Integer type:
| |
| Data | ||||
| Time | 32 | — | UTC Timestamp (UTC time in seconds) | |
| Time Zone | 8 | — |
Timezone in quarter hours (e.g., 22 = +5:30). Each unit = 15 minutes. Value 22 = 22 × 15 min. Range: -48 to 56. Negative timezone in 2's complement. || | |
| ICCID | 160 | — | 20 Bytes, Character string | 8991000903297069053F |
| VID | 32 | — | 4 Bytes, Character string | TRAN |
| CELLULAR_MODULE_FV NAME | 40 | — | 5 Bytes, Character string | TSPJT |
| CELLULAR_MODULE_FV VERSION | 80 | — | 10 Bytes, Character string | XX.YY.ZZZZ |
| MCU_APP_MODULE_FV NAME | 40 | — | 5 Bytes, Character string | TSPJT |
| MCU_APP_MODULE_FV VERSION | 80 | — | 10 Bytes, Character string | XX.YY.ZZZZ |
| MCU_APP_MODULE_FV BUILD NO | 40 | — | 5 Bytes, Character string | YYDDD |
| VN | 80 | — | 10 Bytes, Character string | KL07CP8490 |
| HWINFO | 88 | — | 11 Bytes, Character string | PCB-0220-AB |
| Tail Info (2 Bytes) | ||||
| End Character | 8 | 0–7 | Starting character * (ASCII value 42) | * |
| CRC | 8 | 8–15 | 8-bit XOR CRC of data from $ to * (excluding $ and *) | |