83 lines
2.0 KiB
JavaScript
83 lines
2.0 KiB
JavaScript
var pos = 0;
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var bindata = "";
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var ConvertBase = function (num) {
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return {
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from : function (baseFrom) {
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return {
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to : function (baseTo) {
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return parseInt(num, baseFrom).toString(baseTo);
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}
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};
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}
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};
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};
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function pad(num) {
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var s = "0000000" + num;
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return s.slice(-8);
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}
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ConvertBase.dec2bin = function (num) {
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return pad(ConvertBase(num).from(10).to(2));
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};
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ConvertBase.bin2dec = function (num) {
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return ConvertBase(num).from(2).to(10);
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};
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function data2bits(data) {
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var binary = "";
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for(var i=0; i<data.length; i++) {
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binary += ConvertBase.dec2bin(data[i]);
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}
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return binary;
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}
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function bitShift(bits) {
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var num = ConvertBase.bin2dec(bindata.substr(pos, bits));
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pos += bits;
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return Number(num);
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}
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function precisionRound(number, precision) {
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var factor = Math.pow(10, precision);
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return Math.round(number * factor) / factor;
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}
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function Decoder(fPort, bytes, variables) {
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bindata = data2bits(bytes);
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if(bytes.length != 9) return {"status": "ERROR", "description": "9 bytes are required"};
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Type = bitShift(2);
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Battery = precisionRound(bitShift(5)*0.05+3, 1);
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Wind_ave10 = precisionRound(bitShift(9)*0.1, 1);
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Wind_max10 = Wind_ave10 + precisionRound(bitShift(9)*0.1, 1);
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Wind_min10 = Wind_ave10 - precisionRound(bitShift(9)*0.1, 1);
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Dir_ave10 = precisionRound(bitShift(9)*1, 1);
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Dir_max10 = precisionRound(bitShift(9)*1, 1);
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Dir_hi10 = precisionRound(bitShift(8)*1, 1);
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Dir_lo10 = precisionRound(bitShift(8)*1, 1);
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decoded = {
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"Type": Type,
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"Battery": Battery,
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"Wind_ave10": Wind_ave10,
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"Wind_max10": Wind_max10,
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"Wind_min10": Wind_min10,
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"Dir_ave10": Dir_ave10,
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"Dir_max10": Dir_max10,
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"Dir_hi10": Dir_hi10,
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"Dir_lo10": Dir_lo10,
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};
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return decoded;
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}
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function decodeUplink(input) {
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return {
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data: Decoder(input.fPort, input.bytes, input.variables)
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};
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} |