View source for OTA (Over-The-Air) Packet

{| class="wikitable" style="border:1px solid #ccc; width:100%;"
! style="background-color:#680022; color:white;" | Field
! style="background-color:#680022; color:white;" | Size (bits)
! style="background-color:#680022; color:white;" | Bit Range
! style="background-color:#680022; color:white;" | Description
! style="background-color:#680022; color:white;" | Breakdown
|-
! colspan="5" style="background:#D3D3D3;" | Header
|-
| 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<br>
01 - Alert packet<br>
02 - OTA pkt<br>
03 - Error Packet<br>
04 - Device configuration packet<br>
05 - IP configuration packet
|-
! colspan="5" style="background:#D3D3D3;" | Data
|-
| OTA Source || 5 || — || Source of OTA || 
00 - OTA_SRC_SERIAL<br>
01 - OTA_SRC_SMS<br>
02 - OTA_SRC_IP_TRANSIGHT<br>
03 - OTA_SRC_IP_CUSTOMER
|-
| Error status || 8 || — || Non-zero value indicates an error || 0 = No Error, Non-zero = Error
|-
| Cell Number || 51 || — || First bit (MSB) indicates presence of country code. Remaining 50 bits = mobile number || 
Example: 400D6276ACF52 (+919784312658)
|-
| Date & Time || 32 || — || UTC Timestamp || UTC time in seconds
|-
| Timezone || 8 || — || Timezone in quarter-hours (e.g., 22 = +5:30) || 
22 × 15 mins = 330 mins = +5:30
|-
| Command Length || 8 || — || Length of command string || —
|-
| Command || up to 600 bits (75 bytes) || — || Command with arguments, null-terminated string || 
Example: SET CUIOCFG:IO1-DI-IGN*IO2_AN_GEN*IO3-DI-PBN*IO4-DO-IMB*
|-
| Response Length || 8 || — || Length of response string || —
|-
| Response || up to 512 bits (64 bytes) || — || Response string from device || 
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 || End character * (ASCII value 42) || *
|-
| CRC || 8 || 8–15 || 8-bit XOR CRC from $ to * (excluding both) || —
|}

==Sample Packet==
<pre>
 {"HEX:240340e1cabd09208ca210000000000000006824646f160947455420545355524c1c55524c3a5443503a3134312e3134372e3132382e3135303a383738382aa2",
  "cell_no": 0,
  "command": "GET TSURL",
  "command_length": 9,
  "dateTime": 1747215471,
  "dateTime_tz": "2025-05-14 15:07:51.000",
  "error_status": 0,
  "imei": 860187062240357,
  "insert_time": "Wed, 14 May 2025 09:38:03 GMT",
  "ota_source": 2,
  "packetType": 2,
  "response": "URL:TCP:141.147.128.150:8788",
  "response_length": 28,
  "send_time": "2025-05-14 15:07:51",
  "timezone": 22}
</pre>

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