function Decoder(bytes, port) { // Decode an uplink message from a buffer (array) of bytes to an object of fields.
var decoded = {}; //
decoded.port = port;
decoded.humidity = 0; decoded.temp = 0; 
decoded.count = 0; decoded.bat = 0;
if (port === 10) {  // Port selection
  decoded.temp = (bytes[0] << 16 | bytes[1]<<8 | bytes[2] | (bytes[0] & 0x80 ? 0xFF<<24 : 0))/1000;
  decoded.humidity = (bytes[3] << 16 | bytes[4]<<8 | bytes[5] | (bytes[3] & 0x80 ? 0xFF<<24 : 0))/1000;
  decoded.count = (bytes[6] << 16 | bytes[7]<<8 | bytes[8] | (bytes[6] & 0x80 ? 0xFF<<24 : 0))/1000;
  decoded.bat = (bytes[9] << 16 | bytes[10]<<8 | bytes[11] | (bytes[3] & 0x80 ? 0xFF<<24 : 0))/1000;
 }
//return decoded;
return{ 
  field1:decoded.temp,
  field2:decoded.humidity,
  field3:decoded.count,
  field4:decoded.bat
};
}