public override void Decode(string timestamp, string device, string topic, byte[] payload)
{
string json = Encoding.UTF8.GetString(payload);
dynamic data = JsonConvert.DeserializeObject <dynamic>(json);
payload = System.Convert.FromBase64String(Convert.ToString(data.data));
string deviceInHex = device;
device = Int64.Parse(device, System.Globalization.NumberStyles.HexNumber).ToString();
ReadOnlySpan <byte> span = payload;
/*
* uint8_t Battery [%]
* uint16_t raw Distance [mm]
* uint16_t Angle [deg]
* unit16_t Vertical distance [mm]
* unit16_t Snow depth [mm]
* unit16_t Laser signal strength [0-400] (lower is better)
* uint8_t Laser sensor status
* int16_t Temperature [°C]F
* unit8_t Humidity [%]
* unit32_t Pressure [Pa]
*
* DEVEUI:s
* 1199411787624306471 Stöde 62.4081681,16.5687632
* 1199411787624306472 Matfors 62.348384, 17.016098
* 1199411787624306473 Njurunda 62.310288, 17.369975
* 1199411787624306480 Sundsvall 62.392013, 17.285092
* 1199411787624306481 Alnö 62.424865, 17.434870
* 1199411787624306482 Sidsjö 62.374817, 17.269407
* 1199411787624306483 Granloholm 62.409886, 17.270434
* 1199411787624306484 Kovland 62.466341, 17.147527
* 1199411787624306485 Fagerdalsparken 62.381662, 17.282563
* 1199411787624306486 Finsta 62.461594, 17.345016
*/
double latitude = 1.348364;
double longitude = 1.016056;
if (device == "1199411787624306471")
{
latitude = 62.4081681;
longitude = 16.5687632;
}
else if (device == "1199411787624306472")
{
latitude = 62.348384;
longitude = 17.016098;
}
else if (device == "1199411787624306473")
{
latitude = 62.310288;
longitude = 17.369975;
}
else if (device == "1199411787624306480")
{
latitude = 62.392013;
longitude = 17.285092;
}
else if (device == "1199411787624306481")
{
latitude = 62.424865;
longitude = 17.434870;
}
else if (device == "1199411787624306483")
{
latitude = 62.409886;
longitude = 17.270434;
}
else if (device == "1199411787624306482")
{
latitude = 62.374817;
longitude = 17.269407;
}
else if (device == "1199411787624306484")
{
latitude = 62.466341;
longitude = 17.147527;
}
else if (device == "1199411787624306485")
{
latitude = 62.381662;
longitude = 17.282563;
}
else if (device == "1199411787624306486")
{
latitude = 62.461594;
longitude = 17.345016;
}
// TODO: We need to decide on the device names. Should we use the name from the LoRa app server?
string deviceName = "snow_" + deviceInHex;
IoTHubMessageOrigin origin = new IoTHubMessageOrigin(deviceName, latitude, longitude);
double volts = payload[0];
volts = Math.Round(3 * ((volts * 0.005) + 1.1), 3);
_messageQueue.PostMessage(new SensorStatusMessage(origin, timestamp, volts));
const byte sensorStatusIsOK = 0;
if (payload[11] == sensorStatusIsOK)
{
DateTime dt = DateTime.ParseExact(timestamp, "yyyy-MM-ddTHH:mm:ssZ", null);
if (dt.Month < 5 || dt.Month > 10)
{
double snowdepth = BinaryPrimitives.ReadUInt16BigEndian(span.Slice(start: 7, length: 2));
snowdepth = Math.Round(snowdepth / 10.0, 1);
_messageQueue.PostMessage(new TelemetrySnowdepth(origin, timestamp, snowdepth));
}
else
{
Console.WriteLine($"Snowdepth readings are disabled.");
}
}
else
{
Console.WriteLine($"Ignoring snowdepth reading from {deviceName}. Sensor is not OK.");
}
double temperature = BinaryPrimitives.ReadUInt16BigEndian(span.Slice(start: 12, length: 2));
temperature = Math.Round((temperature / 10.0) - 100.0, 2);
_messageQueue.PostMessage(new TelemetryTemperature(origin, timestamp, temperature));
int humidity = payload[14];
_messageQueue.PostMessage(new TelemetryHumidity(origin, timestamp, humidity));
double pressure = BinaryPrimitives.ReadUInt32BigEndian(span.Slice(start: 15, length: 4));
_messageQueue.PostMessage(new TelemetryPressure(origin, timestamp, (int)pressure));
if (data.ContainsKey("rxInfo"))
{
dynamic rxInfo = data["rxInfo"];
if (rxInfo.Count > 0)
{
dynamic gateway = rxInfo[0];
int maxRSSI = gateway.rssi;
int snr = gateway.loRaSNR;
string name = gateway.name;
for (int i = 1; i < rxInfo.Count; i++)
{
if (rxInfo[i].rssi > maxRSSI)
{
maxRSSI = rxInfo[i].rssi;
snr = gateway.loRaSNR;
name = rxInfo[i].name;
}
}
Console.WriteLine($"{deviceName} is connected to gateway {name} with rssi {maxRSSI} and snr {snr}");
double rssiLevel = Math.Round((125.0 - Math.Abs(maxRSSI)) / 100.0, 2);
rssiLevel = Math.Min(Math.Max(0, rssiLevel), 1.0); // RSSI level should be in range [0 1]
double snrLevel = Math.Round((snr + 20.0) / 32.0, 2);
snrLevel = Math.Min(Math.Max(0, snrLevel), 1.0);
deviceName = "se:servanet:lora:" + deviceName;
var msg = new Fiware.DeviceMessage(deviceName).WithRSSI(rssiLevel).WithSNR(snrLevel);
msg = msg.WithVoltage(Math.Min(Math.Max(0, volts / 4.925), 1));
try
{
_fiwareContextBroker.PostMessage(msg);
}
catch (Exception e)
{
Console.WriteLine($"Exception caught attempting to post Device update: {e.Message}");
};
}
}
}
public override void Decode(string timestamp, string device, string topic, byte[] payload)
{
string json = Encoding.UTF8.GetString(payload);
var data = JsonConvert.DeserializeObject <dynamic>(json);
var deviceName = "se:servanet:lora:" + Convert.ToString(data.deviceName);
var dateStrNow = DateTime.UtcNow.ToString("yyyy-MM-ddTHH:mm:ssZ");
dynamic obj = null;
if (data.ContainsKey("object"))
{
obj = data["object"];
}
if (deviceName.Contains("sn-elt-livboj-"))
{
if (obj.ContainsKey("present"))
{
var present = obj.present;
string value = "on";
if (present == false)
{
value = "off";
}
var message = new Fiware.DeviceMessage(deviceName, value);
try {
_fiwareContextBroker.PostMessage(message);
}
catch (Exception e)
{
Console.WriteLine($"Exception caught attempting to post Device update: {e.Message}");
};
}
else
{
Console.WriteLine($"No \"present\" property in message from deviceName {deviceName}!: {json}");
return;
}
}
else if (deviceName.Contains("sk-elt-temp-"))
{
if (obj.ContainsKey("externalTemperature"))
{
double value = obj.externalTemperature;
string stringValue = $"t%3D{value}";
var message = new Fiware.DeviceMessage(deviceName, stringValue);
if (obj.ContainsKey("vdd"))
{
double batteryLevel = obj.vdd;
const double MAX_BATTERY_LEVEL = 3665;
if (batteryLevel > MAX_BATTERY_LEVEL)
{
Console.WriteLine($"Battery level of {deviceName} is bigger than the max level. {batteryLevel} > {MAX_BATTERY_LEVEL}!");
}
batteryLevel = batteryLevel / MAX_BATTERY_LEVEL;
message = message.WithVoltage(Math.Round(batteryLevel, 2));
}
try
{
_fiwareContextBroker.PostMessage(message);
}
catch (Exception e)
{
Console.WriteLine($"Exception caught attempting to post Device update: {e.Message}");
};
}
else
{
Console.WriteLine($"No \"externalTemperature\" property in message from deviceName {deviceName}!: {json}");
return;
}
}
else if (deviceName.Contains("TRSense01"))
{
if (obj.ContainsKey("L0_CNT") && obj.ContainsKey("R0_CNT"))
{
string shortDeviceName = deviceName.Remove(0, 16);
ReportTrafficIntensityForLane(shortDeviceName, dateStrNow, 0, (int)obj.L0_CNT, (double)obj.L0_AVG);
ReportTrafficIntensityForLane(shortDeviceName, dateStrNow, 1, (int)obj.L1_CNT, (double)obj.L1_AVG);
ReportTrafficIntensityForLane(shortDeviceName, dateStrNow, 2, (int)obj.L2_CNT, (double)obj.L2_AVG);
ReportTrafficIntensityForLane(shortDeviceName, dateStrNow, 3, (int)obj.L3_CNT, (double)obj.L3_AVG);
ReportTrafficIntensityForLane(shortDeviceName, dateStrNow, 4, (int)obj.R0_CNT, (double)obj.R0_AVG);
ReportTrafficIntensityForLane(shortDeviceName, dateStrNow, 5, (int)obj.R1_CNT, (double)obj.R1_AVG);
ReportTrafficIntensityForLane(shortDeviceName, dateStrNow, 6, (int)obj.R2_CNT, (double)obj.R2_AVG);
ReportTrafficIntensityForLane(shortDeviceName, dateStrNow, 7, (int)obj.R3_CNT, (double)obj.R3_AVG);
}
else
{
Console.WriteLine($"No \"L0_CNT\" property in message from deviceName {deviceName}!: {json}");
return;
}
}
else if (deviceName.Contains("mcg-ers-co2-"))
{
if (obj.ContainsKey("co2"))
{
double co2 = obj.co2;
var aqoMsg = new Fiware.AirQualityObserved(deviceName, dateStrNow);
aqoMsg = aqoMsg.WithCO2(co2);
if (obj.ContainsKey("temperature"))
{
double temp = obj.temperature;
aqoMsg = aqoMsg.WithTemperature(temp);
}
if (obj.ContainsKey("humidity"))
{
double humidity = obj.humidity / 100.0;
aqoMsg = aqoMsg.WithHumidity(humidity);
}
var deviceMsg = new Fiware.DeviceMessage(deviceName);
if (obj.ContainsKey("vdd"))
{
double batteryLevel = obj.vdd;
batteryLevel = batteryLevel / 3665.0;
deviceMsg = deviceMsg.WithVoltage(Math.Round(batteryLevel, 2));
}
try
{
_fiwareContextBroker.PostMessage(deviceMsg);
_fiwareContextBroker.CreateNewEntity(aqoMsg);
}
catch (Exception e)
{
Console.WriteLine($"Exception caught attempting to post Device update: {e.Message}");
};
}
else
{
Console.WriteLine($"No \"co2\" property in message from deviceName {deviceName}!: {json}");
return;
}
}
else if (data.ContainsKey("applicationName") && (data.applicationName == "Watermetering" || data.applicationName == "Soraker" || data.applicationName == "Bergsaker"))
{
deviceName = "se:servanet:lora:msva:" + Convert.ToString(data.deviceName);
if (topic == "/event/up")
{
if (obj != null && obj.ContainsKey("statusCode"))
{
int statusCode = obj.statusCode;
int curVol = 0;
if (obj.ContainsKey("curVol"))
{
curVol = obj.curVol;
if (curVol >= 0)
{
var entity = new Fiware.WaterConsumptionObserved(deviceName + ":" + dateStrNow, deviceName, dateStrNow, curVol);
try
{
_fiwareContextBroker.CreateNewEntity(entity);
}
catch (Exception e)
{
Console.WriteLine($"Exception caught attempting to post WaterConsumptionObserved: {e.Message}");
};
}
else
{
Console.WriteLine($"Ignoring negative current volume: {curVol}");
}
}
}
if (data.ContainsKey("rxInfo"))
{
dynamic rxInfo = data["rxInfo"];
if (rxInfo.Count > 0)
{
dynamic gateway = rxInfo[0];
int maxRSSI = gateway.rssi;
int snr = gateway.loRaSNR;
string name = gateway.name;
for (int i = 1; i < rxInfo.Count; i++)
{
if (rxInfo[i].rssi > maxRSSI)
{
maxRSSI = rxInfo[i].rssi;
snr = gateway.loRaSNR;
name = rxInfo[i].name;
}
}
Console.WriteLine($"{deviceName} is connected to gateway {name} with rssi {maxRSSI} and snr {snr}");
double rssiLevel = Math.Round((125.0 - Math.Abs(maxRSSI)) / 100.0, 2);
rssiLevel = Math.Min(Math.Max(0, rssiLevel), 1.0); // RSSI level should be in range [0 1]
double snrLevel = Math.Round((snr + 20.0) / 32.0, 2);
snrLevel = Math.Min(Math.Max(0, snrLevel), 1.0);
var msg = new Fiware.DeviceMessage(deviceName).WithRSSI(rssiLevel).WithSNR(snrLevel);
try
{
_fiwareContextBroker.PostMessage(msg);
}
catch (Exception e)
{
Console.WriteLine($"Exception caught attempting to post Device update: {e.Message}");
};
}
}
}
else if (topic == "/event/status")
{
if (data.externalPowerSource == false && data.batteryLevelUnavailable == false)
{
double batteryLevel = data.batteryLevel / 100.0;
var msg = new Fiware.DeviceMessage(deviceName).WithVoltage(Math.Round(batteryLevel, 2));
try
{
_fiwareContextBroker.PostMessage(msg);
}
catch (Exception e)
{
Console.WriteLine($"Exception caught attempting to post Device update: {e.Message}");
};
}
}
}
Console.WriteLine($"Got message from {deviceName} on topic {topic}: {json}");
}