// V0.1, 12.07.2021, DS
if (msg.port == 15) {
var decoded = decodeFromHex(parseHexString(msg.data));
decoded.ts = msg.ts;
decoded.rssi = msg.rssi;
decoded.snr = msg.snr;
decoded.toa = msg.toa;
decoded.frequency = msg.frequency;
decoded.dr = msg.dr;
decoded.bat = decodeBattery(msg.bat);
decoded.hex = msg.data;
return {
msg: decoded,
metadata: metadata,
msgType: msgType
};
}
else{
return {
msg: msg,
metadata: metadata,
msgType: msgType
};
}
function decodeFromHex(bytes) {
// Decode an uplink message from a buffer
// (array) of bytes to an object of fields.
var decoded = {};
n = bytes.length;
idx = 0;
while (n > idx) {
s = bytes[idx++];
decoded.type = bytes[idx];
if (bytes[idx] == 4) {
decoded.currentScene = bytes[idx + 1];
}
idx += s;
}
return decoded;
}
function parseHexString(hex) {
for (var bytes = [], c = 0; c < hex.length; c += 2)
bytes.push(parseInt(hex.substr(c, 2), 16));
return bytes;
}
function decodeBattery(byte) {
if (byte == 0) {
return 'External power source';
} else if (byte > 0 && byte < 255) {
return byte / 254 * 100;
} else {
return 'Unknown battery state';
}
}
