123 lines
2.7 KiB
JavaScript
123 lines
2.7 KiB
JavaScript
var pos = 0;
|
|
var bindata = "";
|
|
|
|
var ConvertBase = function (num) {
|
|
return {
|
|
from : function (baseFrom) {
|
|
return {
|
|
to : function (baseTo) {
|
|
return parseInt(num, baseFrom).toString(baseTo);
|
|
}
|
|
};
|
|
}
|
|
};
|
|
};
|
|
|
|
function pad(num) {
|
|
var s = "0000000" + num;
|
|
return s.slice(-8);
|
|
}
|
|
|
|
function windify(num) {
|
|
if (num > 0) {
|
|
return num * 0.6335 + 0.3582
|
|
} else {
|
|
return 0
|
|
}
|
|
|
|
}
|
|
|
|
ConvertBase.dec2bin = function (num) {
|
|
return pad(ConvertBase(num).from(10).to(2));
|
|
};
|
|
|
|
ConvertBase.bin2dec = function (num) {
|
|
return ConvertBase(num).from(2).to(10);
|
|
};
|
|
|
|
function data2bits(data) {
|
|
var binary = "";
|
|
for(var i=0; i<data.length; i++) {
|
|
binary += ConvertBase.dec2bin(data[i]);
|
|
}
|
|
return binary;
|
|
}
|
|
|
|
function bitShift(bits) {
|
|
var num = ConvertBase.bin2dec(bindata.substr(pos, bits));
|
|
pos += bits;
|
|
return Number(num);
|
|
}
|
|
|
|
function precisionRound(number, precision) {
|
|
var factor = Math.pow(10, precision);
|
|
return Math.round(number * factor) / factor;
|
|
}
|
|
|
|
function Decoder(fPort, bytes, variables) {
|
|
bindata = data2bits(bytes);
|
|
|
|
if(bytes.length != 12) return {"status": "ERROR", "description": "12 bytes are required"};
|
|
|
|
Index = bitShift(8)*1;
|
|
|
|
if ((Index % 10) <= 4) {
|
|
bitShift(1); // is 9th bit useless?
|
|
Battery = (Index % 10) * 0.2 + 3.3;
|
|
} else {
|
|
bitShift(1); // is 9th bit useless?
|
|
Battery = (Index % 10) * 0.2 + 3.3 - 1;
|
|
}
|
|
|
|
Hz_avg = bitShift(12) * 0.02
|
|
Wind_10m_avg = precisionRound(windify(Hz_avg), 2);
|
|
|
|
Hz_3s_gust = bitShift(9) * 0.1 + Hz_avg
|
|
Wind_3s_gust = precisionRound(windify(Hz_3s_gust), 1);
|
|
|
|
Hz_1s_gust = bitShift(8) * 0.1 + Hz_3s_gust;
|
|
Wind_1s_gust = precisionRound(windify(Hz_1s_gust), 1);
|
|
|
|
Hz_3s_min = bitShift(9) * 0.1
|
|
Wind_3s_min = precisionRound(windify(Hz_3s_min), 1);
|
|
|
|
Wind_stdev = precisionRound(bitShift(8) * 0.1, 1);
|
|
|
|
Dir_10m_avg = bitShift(9);
|
|
|
|
Dir_1s_gust = bitShift(9);
|
|
|
|
Dir_stdev = bitShift(8);
|
|
|
|
Duration_gust = bitShift(7) * 5;
|
|
|
|
Alarm_sent = bitShift(1);
|
|
|
|
Debug_flags = bitShift(1);
|
|
|
|
decoded = {
|
|
"Index": Index,
|
|
"Battery": Battery,
|
|
"Wind_10m_avg": Wind_10m_avg,
|
|
"Wind_3s_gust": Wind_3s_gust,
|
|
"Wind_1s_gust": Wind_1s_gust,
|
|
"Wind_3s_min": Wind_3s_min,
|
|
"Wind_stdev": Wind_stdev,
|
|
"Dir_10m_avg": Dir_10m_avg,
|
|
"Dir_1s_gust": Dir_1s_gust,
|
|
"Dir_stdev": Dir_stdev,
|
|
"Duration_gust": Duration_gust,
|
|
"Alarm_sent": Alarm_sent,
|
|
"Debug_flags": Debug_flags,
|
|
};
|
|
|
|
return decoded;
|
|
|
|
}
|
|
|
|
function decodeUplink(input) {
|
|
return {
|
|
data: Decoder(input.fPort, input.bytes, input.variables)
|
|
};
|
|
}
|