private async void SensorUpdateTimerCallback(object state)
{
try
{
UnitsNet.Temperature temperature = bme280Sensor.Temperature;
double humidity = bme280Sensor.Humidity;
UnitsNet.Pressure airPressure = bme280Sensor.Pressure;
Debug.WriteLine($"{DateTime.UtcNow.ToLongTimeString()} Timer triggered " +
$"Temperature: {temperature.DegreesCelsius:0.0}°C {temperature.DegreesFahrenheit:0.0}°F " +
$"Humidity: {humidity:0.0}% " +
$"AirPressure: {airPressure.Kilopascals:0.000}KPa ");
// Manually construct JSON payload, not recomended
string payloadText = @"{""Temperature"":" + temperature.DegreesCelsius.ToString("f1") +
@",""Humidity"":" + humidity.ToString("F0") +
@",""AirPressure"":" + airPressure.Kilopascals.ToString("F3") +
@"}";
using (var message = new Message(Encoding.ASCII.GetBytes(payloadText)))
{
Debug.WriteLine("AzureIoTHubClient SendEventAsync starting");
await azureIoTHubClient.SendEventAsync(message);
Debug.WriteLine("AzureIoTHubClient SendEventAsync finished");
}
}
catch (Exception ex)
{
Debug.WriteLine($"Retrieving or sending sensor values failed:{ex.Message}");
}
}
private async void SensorUpdateTimerCallback(object state)
{
try
{
UnitsNet.Temperature temperature = bme280Sensor.Temperature;
double humidity = bme280Sensor.Humidity;
UnitsNet.Pressure airPressure = bme280Sensor.Pressure;
Debug.WriteLine($"{DateTime.UtcNow.ToLongTimeString()} Timer triggered " +
$"Temperature: {temperature.DegreesCelsius:0.0}°C {temperature.DegreesFahrenheit:0.0}°F " +
$"Humidity: {humidity:0.0}% " +
$"AirPressure: {airPressure.Kilopascals:0.000}KPa ");
SensorPayload sensorPayload = new SensorPayload()
{
Temperature = temperature.DegreesCelsius,
Humidity = humidity,
AirPressure = airPressure.Kilopascals,
};
string payloadText = JsonConvert.SerializeObject(sensorPayload);
using (var message = new Message(Encoding.ASCII.GetBytes(payloadText)))
{
Debug.WriteLine("AzureIoTHubClient SendEventAsync starting");
await azureIoTHubClient.SendEventAsync(message);
Debug.WriteLine("AzureIoTHubClient SendEventAsync finished");
}
}
catch (Exception ex)
{
Debug.WriteLine($"Retrieving or sending sensor values failed:{ex.Message}");
}
}
private async void SensorUpdateTimerCallback(object state)
{
try
{
// Checking that SaS token isn't about to expire
if ((DateTime.UtcNow - sasTokenIssuedAtUtc) >= sasTokenValidityPeriod)
{
Debug.WriteLine($"{DateTime.UtcNow.ToString("hh:mm:ss")} SAS token needs renewing");
try
{
TpmDevice myDevice = new TpmDevice(0); // Use logical device 0 on the TPM
azureIoTHubUri = myDevice.GetHostName();
deviceId = myDevice.GetDeviceId();
sasToken = myDevice.GetSASToken((uint)sasTokenValidityPeriod.TotalSeconds);
sasTokenIssuedAtUtc = DateTime.UtcNow;
}
catch (Exception ex)
{
Debug.WriteLine($"TpmDevice.GetSASToken refresh failed:{ex.Message}");
return;
}
try
{
azureIoTHubClient = DeviceClient.Create(azureIoTHubUri, AuthenticationMethodFactory.CreateAuthenticationWithToken(deviceId, sasToken), TransportType.Mqtt);
}
catch (Exception ex)
{
Debug.WriteLine($"DeviceClient.Create with TPM info failed:{ex.Message}");
return;
}
Debug.WriteLine($"{DateTime.UtcNow.ToString("hh:mm:ss")} SAS token renewed ");
}
UnitsNet.Temperature temperature = bme280Sensor.Temperature;
double humidity = bme280Sensor.Humidity;
UnitsNet.Pressure airPressure = bme280Sensor.Pressure;
Debug.WriteLine($"{DateTime.UtcNow.ToLongTimeString()} Timer triggered " +
$"Temperature: {temperature.DegreesCelsius:0.0}°C {temperature.DegreesFahrenheit:0.0}°F " +
$"Humidity: {humidity:0.0}% " +
$"AirPressure: {airPressure.Kilopascals:0.000}KPa ");
SensorPayloadDto sensorPayload = new SensorPayloadDto()
{
Temperature = temperature.DegreesCelsius,
Humidity = humidity,
AirPressure = airPressure.Kilopascals,
};
string payloadText = JsonConvert.SerializeObject(sensorPayload);
using (var message = new Message(Encoding.ASCII.GetBytes(payloadText)))
{
Debug.WriteLine($" {DateTime.UtcNow.ToString("hh:mm:ss.fff")} AzureIoTHubClient SendEventAsync starting");
await azureIoTHubClient.SendEventAsync(message);
Debug.WriteLine($" {DateTime.UtcNow.ToString("hh:mm:ss.fff")} AzureIoTHubClient SendEventAsync finished");
}
}
catch (Exception ex)
{
Debug.WriteLine($"Retrieving or sending sensor values failed:{ex.Message}");
}
}
