How to use the crc16xmodem function from crc

Find comprehensive JavaScript crc.crc16xmodem code examples handpicked from public code repositorys.

crc.crc16xmodem is a method used to calculate the CRC-16 checksum of a buffer or string using the XMODEM algorithm.

index.js

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                                blockData
                                ]);
log.info('SENDBLOCK! Data length: ' + blockData.length);
log.info(sendBuffer);
if(mode === 'crc') {
  var crcString = crc.crc16xmodem(blockData).toString(16);
  // Need to avoid odd string for Buffer creation
  if(crcString.length % 2 == 1) {
    crcString = '0'.concat(crcString);
  }

xmodem.js

GitHub: GridSpace/carve-control

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    blockData
]);
log.info('SENDBLOCK! Data length: ' + blockData.length);
log.info(sendBuffer);
if (mode === 'crc') {
    let crcString = crc.crc16xmodem(blockData).toString(16);
    // avoid odd string buffer lengths
    if (crcString.length % 2 == 1) {
        crcString = '0'.concat(crcString);
    }

+ 3 other calls in file

How does crc.crc16xmodem work?

The crc.crc16xmodem function calculates a 16-bit cyclic redundancy check (CRC) using the XMODEM polynomial algorithm on the input data, which can be a string, buffer, or array. The algorithm is based on a generator polynomial of x^16 + x^12 + x^5 + 1 (0x1021) and processes the data byte-by-byte in a serial manner, producing a 16-bit checksum at the end. The checksum is commonly used to detect data transmission errors.

index.js

GitHub: ronnyAcosta/driveriddatabasegenerator

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    }, 500);
});

socket.on('buffer', (iButtonsString)=>{
    let iButtonsBuffer = Buffer.alloc(iButtonsString.length/2, iButtonsString, 'hex');
    let crc = crc16xmodem(iButtonsBuffer).toString(16);
    if(crc.length < 4){
        switch(crc.length){
            case 1:
                crc = `000${crc}`;

+ 5 other calls in file

plugwiseMessage.js

GitHub: DavZero/jeedom_plugwise

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}

output()
{
  var message = this._messageType.value + this._messageType.format(this._sourceDevice, this._param);
  return PlugwiseMessageConst.HEADER.value + message + crc.crc16xmodem(message).toString(16).toUpperCase().pad(4) + PlugwiseMessageConst.FOOTER.value;
}

toString(){
  return "date d'envoi : " + this.dateEmitted + ", date acceptation : " + this.dateAccepted + ", source : " + this._sourceDevice.getMac() + ", nbreEssai : " + this.getTryCount() + ", output : " + this.output();

+ 7 other calls in file

Ai Example

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const crc = require("crc");

const buffer = Buffer.from("Hello, world!", "utf8");

const checksum = crc.crc16xmodem(buffer);

console.log(checksum); // Output: 14319

In this example, the crc.crc16xmodem method is imported from the crc package, and used to calculate the CRC-16 XMODEM checksum for a buffer that contains the string "Hello, world!" encoded as UTF-8. The resulting checksum value is then logged to the console.

plugwiseDeamon.js

GitHub: DavZero/jeedom_plugwise

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/*setTimeout(() => {sendToJeedom({eventType: 'changeState', state : 'On', mac: '000D6F0000D3595D'})},1000) ;
setTimeout(() => {sendToJeedom({eventType: 'changeState', state : 'Off', mac: '000D6F0000D3595D'})},1000) ;*/


//Test de class
//var crc = require('crc');
//test = crc.crc16xmodem('00240707000D6F00002367151004973C0005F9C801850000047300074E0843A901').toString(16).toUpperCase();
//Logger.log("Test de crc : " + test.pad(4), LogType.INFO);


/*var test = require('./plugwisejs/testdvt.js')
var test2 = require('./plugwisejs/plugwiseMessage.js')

+ 3 other calls in file

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