Function calculateCrc

calculateCrc(data: Buffer): number

Calculate CRC-16 (IBM / ANSI) checksum for Teltonika packets. CRC is calculated over the "data field": from Codec ID (byte 8) up to Number of Data 2.

Parameters

data: Buffer
Buffer containing the data field

Returns number

Calculated CRC-16 value

Example

const data = Buffer.from(
  "8E01" +     // Codec ID + Number of Data 1
  "0000016B4F831C6801" +
  "000000000000000000000000" +
  "00010005000100010100010011001d" +
  "00010010015e2c88" +
  "0002000b000000003544c87a000e000000001dd7e06a" +
  "01",        // Number of Data 2
  "hex"
);

const crc = packet.calculateCrc(data);
console.log(crc.toString(16)); // "2994"