This decoder code is only applicable for LoRa Devices with a “Cayenne LPP” format in their payload. For more information consult the documentation here.
// Decode an uplink message from a buffer
// example: 0A02019014880323B6F0AFB302BF20
function Decoder(bytes, port)
{
var decoded = {};
var i = 0;
var sensor_types = {
0 : {'size': 1, 'name': 'Digital Input' ,},
1 : {'size': 1, 'name': 'Digital Output' ,},
2 : {'size': 2, 'name': 'Analog Input' ,},
3 : {'size': 2, 'name': 'Analog Output' ,},
101: {'size': 2, 'name': 'Illuminance Sensor' ,},
102: {'size': 1, 'name': 'Presence Sensor' ,},
103: {'size': 2, 'name': 'Temperature Sensor' ,},
104: {'size': 1, 'name': 'Humidity Sensor' ,},
113: {'size': 6, 'name': 'Accelerometer' ,},
115: {'size': 2, 'name': 'Barometer' ,},
134: {'size': 6, 'name': 'Gyrometer' ,},
136: {'size': 9, 'name': 'GPS Location' ,},};
decoded.type = "position";
if (port === 2){
while(i < bytes.length){
s_ch = bytes[i++]; //Channel
s_type = bytes[i++]; //Message Type
s_size = sensor_types[s_type].size; //Data length
switch (s_type) {
case 0 : // Digital Input
case 1 : // Digital Output
case 2 : // Analog Input
decoded.battery=((bytes[2]<<8 | bytes[3]))/100;
break;
case 3 : // Analog Output
case 101: // Illuminance Sensor
case 102: // Presence Sensor
case 103: // Temperature Sensor
case 104: // Humidity Sensor
case 113: // Accelerometer
case 115: // Barometer
case 136:
decoded.latitude = (bytes[6]<<24>>8 | bytes[7]<<8 | bytes[8])/10000;
decoded.longitude = (bytes[9]<<24>>8 | bytes[10]<<8 | bytes[11])/10000;
decoded.altitude=((bytes[12]<<16 | bytes[13]<<8 | bytes[14])/100);
break;
}
i += s_size;
}
}
return decoded;
}To use this code, we go to the application and then select the “Payload Formats” tab.
We paste the code in the "decoder" tab and we save it in "save payload functions".
The payload received from the device is contained in the "bytes" variable, after receiving it it is decoded to display the value of each sensor in a JSON value.
Payload: 0A02019014880323B6F0AFB302BF20
