90 lines
2.3 KiB
JavaScript
90 lines
2.3 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 != 10) return {"status": "ERROR", "description": "10 bytes are required"};
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Index = precisionRound(bitShift(8)*1, 1);
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Battery = precisionRound(bitShift(3)*0.2+3, 1);
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Wind_ave = precisionRound(bitShift(9)*0.1, 1);
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Wind_3sgust = Wind_ave + precisionRound(bitShift(9)*0.1, 1);
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Wind_3smin = Wind_ave - precisionRound(bitShift(9)*0.1, 1);
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Wind_stdev = precisionRound(bitShift(8)*0.1, 1);
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Dir_ave = precisionRound(bitShift(9)*1, 1);
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Dir_3sgust = precisionRound(bitShift(9)*1, 1);
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Dir_stdev = precisionRound(bitShift(7)*1, 1);
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Gust_time = precisionRound(bitShift(7)*5, 1);
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Vector_scalar = precisionRound(bitShift(1)*1, 1);
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Alarm_sent = precisionRound(bitShift(1)*1, 1);
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decoded = {
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"Index": Index,
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"Battery": Battery,
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"Wind_ave": Wind_ave,
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"Wind_3sgust": Wind_3sgust,
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"Wind_3smin": Wind_3smin,
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"Wind_stdev": Wind_stdev,
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"Dir_ave": Dir_ave,
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"Dir_3sgust": Dir_3sgust,
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"Dir_stdev": Dir_stdev,
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"Gust_time": Gust_time,
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"Vector_scalar": Vector_scalar,
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"Alarm_sent": Alarm_sent,
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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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}
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