const byteData= HexString2Bytes("1A3B4C5D")
let crc = crc16(byteData)
// CRC转换： A185
console.log("CRC转换：",crc)function crc16(buffer) {var crc = 0x0000;var odd;for(var i = 0; i < buffer.length; i++) {crc ^= (buffer[i] << 8)for(var j = 0; j < 8; j++) {odd = crc & 0x8000;crc = crc << 1;if(odd) {crc = crc ^ 0x1021}}}var hi = ((crc & 0xFF00) >> 8); //高位置var lo = (crc & 0x00FF); //低位置var crcArr = []crcArr.push(hi)crcArr.push(lo)crc &= 0xFFFFreturn crcToString(crcArr, true)
};    //转为大写String
function crcToString(arr, isReverse) {if(typeof isReverse == 'undefined') {isReverse = true;}var hi = arr[0],lo = arr[1];return padLeft((isReverse ? hi + lo * 0x100 : hi * 0x100 + lo).toString(16).toUpperCase(), 4, '0');};function padLeft(s, w, pc) {if (pc == undefined) {pc = '0';}for (var i = 0, c = w - s.length; i < c; i++) {s = pc + s;}return s;};//十六进制字符串转字节数组
function HexString2Bytes(str) {var pos = 0;var len = str.length;if (len % 2 != 0) {return null;}len /= 2;var arrBytes = new Array();for (var i = 0; i < len; i++) {var s = str.substr(pos, 2);var v = parseInt(s, 16);arrBytes.push(v);pos += 2;}return arrBytes;}