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==Device Info Packet Structure==
{| class="wikitable"
|-
! colspan="5" style="background:#D3D3D3;" | 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:
* 00 - Device info Packet 
* 01 - Alert Packet 
* 02 - OTA Packet 
* 03 - Error Packet 
* 04 - Device configuration Packet 
* 05 - IP configuration Packet ||
|-
! colspan="5" style="background:#D3D3D3;" | 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
|-
! colspan="5" style="background:#D3D3D3;" | 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 *) ||
|}


==Telemetry Packet structure==
{| class="wikitable"
|-
! colspan="5" style="background:#D3D3D3;" | Header (10 bytes)
|-
! Field !! Size (bits) !! Bit Range !! Description !! Breakdown
|-
| Start byte || 8 || 0–7 || Starting character $ (ASCII value 36) || $
|-
| Data length || 12 || 08–19 || 2-byte length of the data following the header ||
|-
| Num of data packets || 5 || 20–24 || Number of packets (0–32) || 0–32
|-
| IMEI || 50 || 25–74 || Unique device identifier || e.g., 887744556677882
|-
| packet type || 5 || 75–79 || Integer type: 
* 00 - Device Info Packet 
* 01 - Alert Packet 
* 02 - OTA Packet 
* 03 - Error Packet 
* 04 - Device Configuration Packet 
* 05 - IP Configuration Packet 
* 06 - Live ||
|-
! colspan="5" style="background:#D3D3D3;" | Data (= 55 bytes × number of packets)
|-
| Packet Status || 1 || — || Type of packet ||
|-
| Frame Number || 16 || — || Frame number ||
|-
| AlertID || 8 || — || Alert identifier ||
|-
| Operator || 4 || — || Network operator || 00-Airtel, 01-BSNL, 02-VI, 04-JIO
|-
| Signal Strength || 5 || — || Signal strength || Integer (0–31)
|-
| MCC || 10 || — || Mobile country code || Integer
|-
| MNC || 6 || — || Mobile network code || Integer
|-
| Cell Id || 16 || — || Cell tower ID || Integer
|-
| Location Area Code || 16 || — || Location area code || Integer
|-
| Fix_status || 1 || — || GPS fix status || 0: No fix, 1: Valid Fix
|-
| Start byte || 1 || — || Latitude coordinate || Divide by 1,000,000 for float value
|-
| NS_Indication || 1 || — || N or S || 0: N, 1: S
|-
| Longitude || 29 || — || Longitude coordinate || Divide by 1,000,000 for float value
|-
| EW_Indication || 1 || — || East/West Indication || 0: E, 1: W
|-
| HDOP || 10 || — || Horizontal dilution || Divide by 10 for float value
|-
| PDOP || 10 || — || Position dilution || Divide by 10 for float value
|-
| Speed || 10 || — || Speed in km/h || Divide by 10 for float value
|-
| Altitude || 15 || — || Altitude in meters || Divide by 10 for float value
|-
| Power Status || 1 || — || Power connection status || 0: Power disconnected, 1: Power connected
|-
| Ignition Status || 1 || — || Ignition status || 0: OFF, 1: ON
|-
| Immobilizer Status || 1 || — || Immobilizer status || 0: OFF, 1: ON
|-
| Tamper || 1 || — || Wire Tamper detection || 0: Tamper clear, 1: Tamper alert ON
|-
| Supply Voltage || 6 || — || External battery voltage || Divide by 10 for float value
|-
| Internal Battery Voltage || 6 || — || Internal battery voltage || Divide by 10 for float value
|-
| Fuel SensorValue 1 || 16 || — || Fuel sensor value || Divide by 10 if float
|-
| Fuel Percentage 1 || 16 || — || Fuel level percentage || Divide by 10 for float value
|-
| Fuel SensorValue 2 || 16 || — || Fuel sensor value || Divide by 10 if float
|-
| Fuel Percentage 2 || 16 || — || Fuel level percentage || Divide by 10 for float value
|-
| Fuel SensorValue 3 || 16 || — || Fuel sensor value || Divide by 10 if float
|-
| Fuel Percentage 3 || 16 || — || Fuel level percentage || Divide by 10 for float value
|-
| Analog Input || 10 || — || Analog input || Divide by 10 for float value
|-
| Analog Input 1 || 10 || — || Analog input 1 || Divide by 10 for float value
|-
| Digital Input 1 || 1 || — || Digital input 1 || 0 or 1
|-
| Digital Input 2 || 1 || — || Digital input 2 || 0 or 1
|-
| Digital Output 1 || 1 || — || Digital output 1 || 0 or 1
|-
| Digital Output 2 || 1 || — || Digital output 2 || 0 or 1
|-
| Temperature sensor status 1 || 1 || — || Status of temperature sensor 1 || 1 if connected, 0 if not connected
|-
| Temperature 1 || 12 || — || Temperature in °C || Signed, divide by 10
|-
| Temperature sensor status 2 || 1 || — || Status of temperature sensor 2 || 1 if connected, 0 if not connected
|-
| Temperature 2 || 12 || — || Temperature in °C || Signed, divide by 10
|-
| Temperature sensor status 3 || 1 || — || Status of temperature sensor 3 || 1 if connected, 0 if not connected
|-
| Temperature 3 || 12 || — || Temperature in °C || Signed, divide by 10
|-
| Humidity || 8 || — || Humidity percentage ||
|-
| Odometer || 35 || — || Odometer value in meters ||
|-
| DateTime UTC || 32 || — || Timestamp || UTC time in seconds
|-
| TimeZone || 8 || — ||
Timezone in quarter-hours (e.g., 22 = +5:30). 
Each unit = 15 mins. 
Value 22 = 22 × 15 mins = 330 mins = +5:30 
Range: -48 to 56, 2's complement ||
|-
! colspan="5" "style="background:#D3D3D3;" | Tail
|-
| End Character || 8 || 0–7 || Starting character * (ASCII value 42) || *
|-
| CRC || 8 || 8–15 || 8-bit XOR CRC of data starting from $ to * (excluding $ and *) ||
|}
==OTA Packet structure==
{| class="wikitable"
|-
! colspan="5" style="background:#D3D3D3;" | Header
|-
! Field !! Size (bits) !! Bit Range !! Description !! Breakdown
|-
| Start byte || 8 || 0–7 || Starting character $ (ASCII value 36) || $
|-
| Data length || 12 || 8–18 || 2-byte length of the data following the header ||
|-
| Num of data packets || 5 || 19–23 || Number of packets (0–32) || 0 - 32
|-
| IMEI || 50 || 24–74 || Unique device identifier || Integer type: e.g., 887744556677882
|-
| Packet Type || 5 || 75–79 || Type of packet ||
00 - Device info 
01 - Alert packet 
02 - OTA pkt 
03 - ErrorPacket 
04 - Device configuration packet 
05 - IP configuration packet
|-
! colspan="5" style="background:#D3D3D3;" | Data
|-
| OTA Source || 5 || — || Source of OTA ||
00 - OTA_SRC_SERIAL 
01 - OTA_SRC_SMS 
02 - OTA_SRC_IP_TRANSIGHT 
03 - OTA_SRC_IP_CUSTOMER
|-
| Error status || 8 || — || Non-zero value indicates an error || NO ERROR = 0, ERROR = Non-zero value
|-
| Cell Number || 51 || — ||
First bit (MSB) with value 1 = number includes country code. 
If MSB = 0, number is without country code. 
Remaining 50 bits represent mobile number in integer format. ||
Example: 400D6276ACF52 (+919784312658)
|-
| Date & Time || 32 || — || UTC Timestamp || UTC time in seconds
|-
| Timezone || 8 || — ||
Timezone in quarter-hours (e.g., 22 = +5:30) 
Quarter-hour increment = 15 minutes per unit 
Range: -48 to 56 (2’s complement for negative) ||
Example: 22 = 22 × 15 = 330 mins 
330 ÷ 60 = 5.5 hrs = +5 hours 30 mins ahead of UTC
|-
| Command Length || 8 || — || Length of command string ||
|-
| Command || max 600 bits (75 bytes) || — || Input command with arguments, char array, terminated with null character ||
Example: SET CUIOCFG:IO1-DI-IGN*IO2_AN_GEN*IO3-DI-PBN*IO4-DO-IMB*
|-
| Response Length || 8 || — || Length of response string ||
|-
| Response || max 512 bits (64 bytes) || — || Response for particular command ||
Example: IOCFG:IO1-DI-IGN*IO2-AN_GEN*IO3-DI-PBN*IO4-DO-IMB*
|-
! colspan="5" style="background:#D3D3D3;" | Tail
|-
| End Character || 8 || 0–7 || Starting character * (ASCII value 42) || *
|-
| CRC || 8 || Aug-15 ||
8-bit XOR CRC of data starting from $ to * 
(excluding $ and *) ||
|}
==Error Packet==
{| class="wikitable"
|-
! colspan="5" style="background:#D3D3D3;" | Header (10 bytes)
|-
! Field !! Size (Bits) !! Bit Range !! Description !! Breakdown
|-
| Start byte || 8 || 0–7 || Starting character $ (ASCII value 36) || $
|-
| Data length || 12 || 08–19 || 2-byte length of the data following the header ||
|-
| Number of data packets || 5 || 20–24 || Number of packets (0–32) || 0–32
|-
| IMEI || 50 || 25–74 || Unique device identifier || —
|-
| packet type || 5 || 75–79 || Type of packet || 02 – OTA Packet
|-
! colspan="5" style="background:#D3D3D3;" | Data
|-
| Time || 32 || — || UTC Timestamp || UTC time in seconds
|-
| Time Zone || 8 || — ||
Time zone in quarter-hours (e.g., 22 = +5:30). 
Quarter-hour increment means each unit represents 15 minutes. 
The value 22 represents 22 quarter-hours. 
Ranges from -48 to 56, negative time zone to 2’s complement representation. ||
eg: 22 (+5:30) 
22 × 15 = 330 minutes = 5.5 hours = +5:30 UTC
|-
| Error Length || 8 || — || Length of Error string || ERROR DATA, LENGTH GIVEN
|-
! colspan="5" style="background:#D3D3D3;" | Tail (2 bytes)
|-
| End Character || 8 || 0–7 || Starting character * (ASCII value 42) || *
|-
| CRC || 8 || 8–15 ||
8-bit XOR CRC of data starting from $ to * (excluding $ and *) ) ||
|}

Revision as of 06:31, 17 June 2025

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