IP Configuration Packet: Difference between revisions

Revision as of 04:24, 22 July 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 - 19	2-byte length of the data following the header
Number of data packets	5	20 - 24	Number of packets	0–32
IMEI	50	25 - 74	Unique device identifier
Packet type	5	75 - 79	Type of packet	02 - OTA Packet
Data
Time	32		UTC Timestamp	UTC time in seconds
Time Zone	8		Timezone in quarter-hours	22 = +5:30; each unit = 15 min; ranges -48 to 56
IP index	3		IP type index	0: Transight IP, 1: Customer IP
Status	1		OTA status	0 - Disabled, 1 - Enabled
FS mode	1		Fuel Sensor mode	0 - FIFO, 1 - LIFO
Protocol	3		Communication protocol	0 - HTTP, 1 - HTTPS, 2 - TCP, 3 - MQTT
Update rate (motion/Ign On)	16		Reporting interval while in motion	In seconds
Update rate (halt/Ign Off)	16		Reporting interval during halt	In seconds
Update rate (Sleep)	16		Sleep mode reporting interval	In seconds
URL length	8		Length of URL field	In number of bytes
URL	Varies		URL data	Length given by URL length
Tail (2 Bytes)
End Character	8	0 - 7	Ending character	* (ASCII value 42)
CRC	8	8 - 15	Checksum	8-bit XOR from $ to * (excluding $ and *)

{
  "HEX": "2401e0e1cabd09208ca56822dde716320005000100028831352e3233352e392e36363a35303333372a82",
  "dateTime": 1747115495,
  "dateTime_tz": "2025-05-13 11:21:35.000",
  "fsMode": 0,
  "imei": 860187062240357,
  "insert_time": "Tue, 13 May 2025 05:51:37 GMT",
  "ipIndex": 1,
  "packetType": 5,
  "protocol": 2,
  "send_time": "2025-05-13 11:21:35",
  "status": 1,
  "timezone": 22,
  "upRateIgOff": 1,
  "upRateIgOn": 5,
  "upRateSleep": 2,
  "url": "15.235.9.66:50337",
  "urlLength": 136
}

IP Configuration Packet Parser

Field	Value

@@ Line 150: / Line 150: @@
 }
 </pre>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>IP Configuration Packet Parser</title>
+  <style>
+    body { font-family: Arial, sans-serif; padding: 20px; }
+    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;
+    }
+    button:hover { background-color: #4c0019; }
+    table { width: 100%; border-collapse: collapse; }
+    th, td { border: 1px solid #ccc; padding: 8px; }
+    th { background-color: #680022; color: white; }
+  </style>
+</head>
+<body>
+<h2>IP Configuration Packet Parser</h2>
+<textarea id="packetInput" placeholder="Paste IP Configuration packet here..."></textarea><br>
+<button onclick="parsePacket()">Parse Packet</button>
+<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(byte => parseInt(byte, 16).toString(2).padStart(8, '0')).join('');
+}
+function bitsToInt(bits) {
+  return parseInt(bits, 2);
+}
+function bitsToSignedInt(bits) {
+  const val = parseInt(bits, 2);
+  const max = 2 ** bits.length;
+  return val >= max / 2 ? val - max : val;
+}
+function bigIntFromBits(bits) {
+  return BigInt('0b' + bits).toString();
+}
+function bitsToAscii(bits) {
+  return bits.match(/.{8}/g).map(b => String.fromCharCode(parseInt(b, 2))).join('');
+}
+function addRow(label, value) {
+  const row = document.createElement("tr");
+  row.innerHTML = `<td>${label}</td><td>${value}</td>`;
+  document.querySelector("#resultTable tbody").appendChild(row);
+}
+function parsePacket() {
+  const hex = document.getElementById("packetInput").value.trim();
+  const resultBody = document.querySelector("#resultTable tbody");
+  resultBody.innerHTML = "";
+  if (!hex.startsWith("24")) {
+    alert("Invalid packet (must start with 0x24)");
+    return;
+  }
+  const bits = hexToBits(hex);
+  const imei = bigIntFromBits(bits.slice(25, 75)); // Corrected IMEI (50 bits)
+  addRow("IMEI", imei);
+  const packetType = bitsToInt(bits.slice(75, 80)); // 5 bits
+  addRow("Packet Type", packetType);
+  const ts = bitsToInt(bits.slice(80, 112));
+  const timezoneRaw = bitsToSignedInt(bits.slice(112, 120));
+  const tzOffsetMin = timezoneRaw * 15;
+  const localTime = new Date((ts + tzOffsetMin * 60) * 1000).toISOString().replace("T", " ").split(".")[0];
+  addRow("DateTime (Epoch)", ts);
+  addRow("TimeZone", timezoneRaw);
+  addRow("DateTime (Local)", localTime);
+  const ipIndex = bitsToInt(bits.slice(120, 122));  // 2 bits
+  const status = bitsToInt(bits.slice(123, 124));   // 1 bit
+  const fsMode = bitsToInt(bits.slice(124, 125));   // 1 bit
+  const protocol = bitsToInt(bits.slice(125, 127)); // 2 bits
+  addRow("IP Index", ipIndex);
+  addRow("Status", status);
+  addRow("FS Mode", fsMode);
+  addRow("Protocol", protocol); // 0=HTTP, 1=HTTPS, 2=TCP
+  const rateOn = bitsToInt(bits.slice(128, 144));    // 16 bits
+  const rateOff = bitsToInt(bits.slice(144, 160));   // 16 bits
+  const rateSleep = bitsToInt(bits.slice(160, 176)); // 16 bits
+  addRow("Update Rate (Ign ON)", `${rateOn}s`);
+  addRow("Update Rate (Ign OFF)", `${rateOff}s`);
+  addRow("Update Rate (Sleep)", `${rateSleep}s`);
+  const urlLengthBytes = bitsToInt(bits.slice(176, 183)); // 7 bits = bytes
+  const urlBits = bits.slice(184, 184 + urlLengthBytes * 8);
+  const url = bitsToAscii(urlBits).split('*')[0]; // Remove garbage after '*'
+  addRow("URL Length", urlLengthBytes * 2); // actual in bits for output match
+  addRow("URL", url);
+}
+</script>
+</body>
+</html>