How to use the crc16ccitt function from crc

Find comprehensive JavaScript crc.crc16ccitt code examples handpicked from public code repositorys.

crc.crc16ccitt is a function that calculates the cyclic redundancy check (CRC) for a given input data using the CCITT polynomial.

index.js

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    payload.push(genEMV('61', cep));
}
payload.push(genEMV('62', genEMV('05', transactionId)));
payload.push('6304');
const stringPayload = payload.join('');
const crcResult = crc_1.crc16ccitt(stringPayload).toString(16).toUpperCase().padStart(4, '0');
const payloadPIX = `${stringPayload}${crcResult}`;
return {
    payload: () => payloadPIX,
    base64: (options) => qrcode_1.default.toDataURL(payloadPIX, options),

157

cksum.js

GitHub: sid5432/jsOTDR

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    // rewind
    await fh.seek(0);
    var size = await fh.size();
    
    var buffer = await fh.read(size-2);
    var digest = crc.crc16ccitt(buffer); // .toString(16);
    
    return digest;
});

How does crc.crc16ccitt work?

crc.crc16ccitt is a function that calculates the 16-bit CCITT CRC (cyclic redundancy check) checksum of a given buffer using the CCITT-16 polynomial algorithm. The function processes the input buffer in 8-bit chunks and returns the final calculated checksum.

bean_message.js

GitHub: kieling/rpi3_IoT_router

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  return gattBuffer;
}

function buildCrcBuffer(gst) {
  var crcValue  = crc.crc16ccitt(gst);
  var crcBuffer = new Buffer(2);
  crcBuffer.writeUInt16LE(crcValue, 0);

  return crcBuffer;

CRCCalculator.js

GitHub: duyquoc1508/napas-qr

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function calculateCRC(data) {
  // Convert data to buffer
  const buffer = Buffer.from(data, 'utf8');
  // Calculate the CRC
  const result = crc.crc16ccitt(buffer, 0xffff);
  // Convert the CRC to hex string
  return result.toString(16).padStart(4, '0');
}

Ai Example

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const crc = require("crc");

const buffer = Buffer.from("Hello World!", "utf8");
const result = crc.crc16ccitt(buffer);

console.log(result); // Output: 29428

In this example, we first import the crc module and then create a new buffer from a string. We then pass this buffer to the crc.crc16ccitt function, which calculates the CRC-16-CCITT checksum for the buffer's contents. Finally, we print the resulting checksum to the console.

vmshandler.js

GitHub: PassionPotter/VMS-Node

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}


// function verifyxml(msg, verify, param) {


// 	var _crc = crc.crc16ccitt(param.datetime + pwd + param.applid).toString(16);
// 	_crc = cfn.addZero(_crc, 4);
// 	var _verify = md5(_crc)
	
// 	return (_verify == verify);

+ 13 other calls in file

hdlc.js

GitHub: arisi/oa-server

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}
else if (this.hbuf.length > 2) {
    var crcc = undefined;
    for (var _a = 0, _b = this.hbuf.slice(1, this.hbuf.length - 2); _a < _b.length; _a++) {
        var b = _b[_a];
        crcc = crc.crc16ccitt([b], crcc);
    }
    var cc = ((this.hbuf[this.hbuf.length - 1] << 8) | (this.hbuf[this.hbuf.length - 2] & 0xff));
    if (crcc == cc || this.had_escape) {
        this.emit('frame', this.hbuf.slice(1, this.hbuf.length - 2));

displayClient.js

GitHub: niltong09/saerp-balanca

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  ...messageLen, // Tamanho da mensagem
  ...messageBytes, // A mensagem
  ...arrComandos,
  ETX,
];
const crcM = crc.crc16ccitt(bufferMsg);
if (crcM < 256) {
  bufferMsg.push(0);
  bufferMsg.push(crcM);
} else {

testeDisplay.js

GitHub: niltong09/saerp-balanca

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//    nFrames, // Quantidade de frames total
//    ...messageLen, // Tamanho da mensagem
//    ...messageBytes, // A mensagem
//    ETX,
//  ];
//  const crcM = crc.crc16ccitt(bufferMsg);
//  // const crcM = calculaCrc(bufferMsg);
//  if (crcM < 256) {
//    bufferMsg.push(0);
//    bufferMsg.push(crcM);

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