longfi-arduino/TTGO-TBeam-Tracker/console-decoders/mapper_decoder.js

22 wiersze
655 B
JavaScript

// Decoder for TTGO_TBeam mapping
function Decoder(bytes, port) {
var decoded = {};
decoded.latitude = ((bytes[0]<<16)>>>0) + ((bytes[1]<<8)>>>0) + bytes[2];
decoded.latitude = (decoded.latitude / 16777215.0 * 180) - 90;
decoded.longitude = ((bytes[3]<<16)>>>0) + ((bytes[4]<<8)>>>0) + bytes[5];
decoded.longitude = (decoded.longitude / 16777215.0 * 360) - 180;
var altValue = ((bytes[6]<<8)>>>0) + bytes[7];
var sign = bytes[6] & (1 << 7);
if(sign) decoded.altitude = 0xFFFF0000 | altValue;
else decoded.altitude = altValue;
decoded.hdop = bytes[8] / 10.0;
decoded.sats = bytes[9];
return decoded;
}