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==OTA Packet structure==
{| class="wikitable" style="border:1px solid #ccc; width:100%;"
{| class="wikitable"
! 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
! 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) || $
|-
|-
| Start byte || 8 || 0–7 || Starting character $ (ASCII value 36) || $
| Data length || 12 || 8–18 || 2-byte length of the data following the header || —
|-
| 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
| Num of data packets || 5 || 19–23 || Number of packets (0–32) || 0 - 32
Line 15: Line 17:
|-
|-
| Packet Type || 5 || 75–79 || Type of packet ||  
| Packet Type || 5 || 75–79 || Type of packet ||  
00 - Device info
00 - Device info<br>
01 - Alert packet
01 - Alert packet<br>
02 - OTA pkt
02 - OTA pkt<br>
03 - ErrorPacket 
03 - Error Packet<br>
04 - Device configuration packet
04 - Device configuration packet<br>
05 - IP configuration packet
05 - IP configuration packet
|-
|-
! colspan="5" style="background:#D3D3D3;" | Data
! colspan="5" style="background:#D3D3D3;" | Data (154 Bytes)
|-
|-
| OTA Source || 5 || — || Source of OTA ||  
| OTA Source || 5 || 80-84|| Source of OTA ||  
00 - OTA_SRC_SERIAL
00 - OTA_SRC_SERIAL<br>
01 - OTA_SRC_SMS
01 - OTA_SRC_SMS<br>
02 - OTA_SRC_IP_TRANSIGHT
02 - OTA_SRC_IP_TRANSIGHT<br>
03 - OTA_SRC_IP_CUSTOMER
03 - OTA_SRC_IP_CUSTOMER
|-
|-
| Error status || 8 || — || Non-zero value indicates an error || NO ERROR = 0, ERROR = Non-zero value
| Error status || 8 || 85-92|| Non-zero value indicates an error || 0 = No Error, Non-zero = Error
|-
|-
| Cell Number || 51 || — ||  
| Cell Number || 51 || 93-143|| First bit (MSB) indicates presence of country code. Remaining 50 bits = mobile number ||  
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)
Example: 400D6276ACF52 (+919784312658)
|-
|-
| Date & Time || 32 || — || UTC Timestamp || UTC time in seconds
| Date & Time || 32 || 144-175|| UTC Timestamp || UTC time in seconds
|-
|-
| Timezone || 8 || — ||  
| Timezone || 8 || 176-183|| Timezone in quarter-hours (e.g., 22 = +5:30) ||  
Timezone in quarter-hours (e.g., 22 = +5:30) 
22 × 15 mins = 330 mins = +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 Length || 8 || 184-191|| Length of command string || —
|-
|-
| Command || max 600 bits (75 bytes) || — || Input command with arguments, char array, terminated with null character ||  
| Command || up to 600 bits (75 bytes) || 192-791 || Command with arguments, null-terminated string ||  
Example: SET CUIOCFG:IO1-DI-IGN*IO2_AN_GEN*IO3-DI-PBN*IO4-DO-IMB*
Example: SET CUIOCFG:IO1-DI-IGN*IO2_AN_GEN*IO3-DI-PBN*IO4-DO-IMB*
|-
|-
| Response Length || 8 || — || Length of response string ||  
| Response Length || 8 || 792-799 || Length of response string || —
|-
|-
| Response || max 512 bits (64 bytes) || — || Response for particular command ||  
| Response || up to 512 bits (64 bytes) || 800-1311|| Response string from device ||  
Example: IOCFG:IO1-DI-IGN*IO2-AN_GEN*IO3-DI-PBN*IO4-DO-IMB*
Example: IOCFG:IO1-DI-IGN*IO2-AN_GEN*IO3-DI-PBN*IO4-DO-IMB*
|-
|-
! colspan="5" style="background:#D3D3D3;" | Tail
! colspan="5" style="background:#D3D3D3;" | Tail (2 Bytes)
|-
|-
| End Character || 8 || 0–7 || Starting character * (ASCII value 42) || *
| End Character || 8 || 0–7 || End character * (ASCII value 42) || *
|-
|-
| CRC || 8 || Aug-15 ||  
| CRC || 8 || 8–15 || 8-bit XOR CRC from $ to * (excluding both) || —
8-bit XOR CRC of data starting from $ to *
(excluding $ and *) ||  
|}
|}
==Sample Packet==
==Sample Packet==
<pre>
<pre>
  {"HEX": "240340e1cabd09208ca210000000000000006824646f160947455420545355524c1c55524c3a5443503a3134312e3134372e3132382e3135303a383738382aa2",
  {HEX : "240630e21aeb7abfd582100000000000000068abef4a160854534657494e464f4c4657494e464f3a2054534434475f305f332e302e350a4657494e464f3a2054532d4452425f32353231315f332e302e320a4657494e464f3a2054532d4434525f32353231315f332e302e350a2ac3" "imei": 862942074896044, "packet_type": 2, "no_packets": 1, "ota_source": 2, "error_status": 0, "cell_no": 0, "dateTime": 1756098378, "timezone": 22, "dateTime_tz": "2025-08-25 10:36:18", "command_length": 8, "command": "TSFWINFO", "response_length": 76, "response": "FWINFO: TSD4G_0_3.0.5\nFWINFO: TS-DRB_25211_3.0.2\nFWINFO: TS-D4R_25211_3.0.5\n", "error_code": 0 }
  "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>
</pre>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <style>
    body { font-family: Arial, sans-serif; }
    textarea { width: 100%; height: 100px; font-family: monospace; }
    button {
      padding: 10px 20px;
      border-radius: 20px;
      font-weight: bold;
      background-color: #680022;
      color: white;
      border: none;
      cursor: pointer;
    }
    button:hover {
      background-color: #4c0019;
    }
    table { width: 100%; border-collapse: collapse; margin-top: 20px; }
    th, td { border: 1px solid #ccc; padding: 8px; text-align: left; }
    th { background-color: #680022; color: white; }
  </style>
</head>
<body>
<h2>OTA Packet Parser</h2>
<textarea id="hexInput" placeholder="Paste OTA packet hex here..."></textarea><br>
<button onclick="parseOTAPacket()">Parse Packet</button>
<h3>Parsed Output:</h3>
<table id="resultTable">
  <thead><tr><th>Field</th><th>Value</th></tr></thead>
  <tbody></tbody>
</table>
<script>
function hexToBits(hex) {
  return hex.match(/.{1,2}/g).map(b =>
    parseInt(b, 16).toString(2).padStart(8, '0')).join('');
}
function bitsToInt(bits) {
  return parseInt(bits, 2);
}
function bitsToSignedInt(bits) {
  let value = parseInt(bits, 2);
  const max = Math.pow(2, bits.length);
  return value >= max / 2 ? value - max : value;
}
function bigIntFromBits(bits) {
  return BigInt('0b' + bits).toString();
}
function bitsToAscii(bits) {
  let ascii = '';
  for (let i = 0; i < bits.length; i += 8) {
    ascii += String.fromCharCode(parseInt(bits.slice(i, i + 8), 2));
  }
  return ascii;
}
function parseOTAPacket() {
  const hex = document.getElementById("hexInput").value.trim().toLowerCase();
  const resultBody = document.querySelector("#resultTable tbody");
  resultBody.innerHTML = "";
  if (!hex || !hex.startsWith("24")) {
    alert("Invalid packet");
    return;
  }
  const bits = hexToBits(hex);
  const output = (label, value) => {
    const row = document.createElement("tr");
    row.innerHTML = `<td>${label}</td><td>${value}</td>`;
    resultBody.appendChild(row);
  };
  const getBits = (start, end) => bits.slice(start, end);
  // Refer to telemetry parser logic — exact structure
  output("IMEI", bigIntFromBits(getBits(25, 75)));
  output("Packet Type", bitsToInt(getBits(75, 80)));
  output("OTA Source", bitsToInt(getBits(80, 85)));
  output("Error Status", bitsToInt(getBits(85, 93)));
  const cellBits = getBits(93, 144);
  const isWithCountryCode = cellBits[0] === '1';
  const cellNo = parseInt(cellBits.slice(1), 2);
  output("Cell Number", isWithCountryCode ? `+${cellNo}` : cellNo);
  const dt = bitsToInt(getBits(144, 176));
  output("UTC Timestamp", new Date(dt * 1000).toISOString());
  const timezoneRaw = bitsToSignedInt(getBits(176, 184));
  const offsetMinutes = timezoneRaw * 15;
  const h = Math.floor(Math.abs(offsetMinutes) / 60);
  const m = Math.abs(offsetMinutes % 60);
  const sign = offsetMinutes >= 0 ? "+" : "-";
  output("Timezone", `${offsetMinutes} mins = UTC${sign}${h}:${m.toString().padStart(2, '0')}`);
  const localTime = new Date((dt + offsetMinutes * 60) * 1000)
    .toISOString().replace("T", " ").replace(".000Z", "");
  output("DateTime (Local)", localTime);
  const cmdLength = bitsToInt(getBits(184, 192));
  output("Command Length", cmdLength);
  const cmdBits = getBits(192, 192 + cmdLength * 8);
  output("Command", bitsToAscii(cmdBits));
  const respLenStart = 192 + cmdLength * 8;
  const responseLength = bitsToInt(getBits(respLenStart, respLenStart + 8));
  output("Response Length", responseLength);
  const respBits = getBits(respLenStart + 8, respLenStart + 8 + responseLength * 8);
  output("Response", bitsToAscii(respBits));
}
</script>
</body>
</html>

Latest revision as of 05:09, 25 August 2025

Field Size (bits) Bit Range Description Breakdown
Header (10 Bytes)
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 - Error Packet
04 - Device configuration packet
05 - IP configuration packet

Data (154 Bytes)
OTA Source 5 80-84 Source of OTA

00 - OTA_SRC_SERIAL
01 - OTA_SRC_SMS
02 - OTA_SRC_IP_TRANSIGHT
03 - OTA_SRC_IP_CUSTOMER

Error status 8 85-92 Non-zero value indicates an error 0 = No Error, Non-zero = Error
Cell Number 51 93-143 First bit (MSB) indicates presence of country code. Remaining 50 bits = mobile number

Example: 400D6276ACF52 (+919784312658)

Date & Time 32 144-175 UTC Timestamp UTC time in seconds
Timezone 8 176-183 Timezone in quarter-hours (e.g., 22 = +5:30)

22 × 15 mins = 330 mins = +5:30

Command Length 8 184-191 Length of command string —
Command up to 600 bits (75 bytes) 192-791 Command with arguments, null-terminated string

Example: SET CUIOCFG:IO1-DI-IGN*IO2_AN_GEN*IO3-DI-PBN*IO4-DO-IMB*

Response Length 8 792-799 Length of response string —
Response up to 512 bits (64 bytes) 800-1311 Response string from device

Example: IOCFG:IO1-DI-IGN*IO2-AN_GEN*IO3-DI-PBN*IO4-DO-IMB*

Tail (2 Bytes)
End Character 8 0–7 End character * (ASCII value 42) *
CRC 8 8–15 8-bit XOR CRC from $ to * (excluding both) —

Sample Packet

 {HEX : "240630e21aeb7abfd582100000000000000068abef4a160854534657494e464f4c4657494e464f3a2054534434475f305f332e302e350a4657494e464f3a2054532d4452425f32353231315f332e302e320a4657494e464f3a2054532d4434525f32353231315f332e302e350a2ac3" "imei": 862942074896044, "packet_type": 2, "no_packets": 1, "ota_source": 2, "error_status": 0, "cell_no": 0, "dateTime": 1756098378, "timezone": 22, "dateTime_tz": "2025-08-25 10:36:18", "command_length": 8, "command": "TSFWINFO", "response_length": 76, "response": "FWINFO: TSD4G_0_3.0.5\nFWINFO: TS-DRB_25211_3.0.2\nFWINFO: TS-D4R_25211_3.0.5\n", "error_code": 0 }


OTA Packet Parser


Parsed Output:

FieldValue

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