public static void Main()
{
Debug.WriteLine(".Net Nanoframework with BMP280 Sensor!");
// connect to wifi
if (!ConnectToWifi())
{
return;
}
// set up for LED and pin
const int pin = 18;
const int lightTime = 1000;
const int dimTime = 4000;
using GpioController led = new();
led.OpenPin(pin, PinMode.Output);
// set up for BMP280
const int busId = 1;
I2cConnectionSettings i2cSettings = new(busId, Bmp280.DefaultI2cAddress);
I2cDevice i2cDevice = I2cDevice.Create(i2cSettings);
using var i2CBmp280 = new Bmp280(i2cDevice);
// Create an X.509 certificate object and create device client for Azure IoT Hub
X509Certificate2 deviceCert = new X509Certificate2(cert, privateKey, "1234");
DeviceClient azureIoTClient = new DeviceClient(IotBrokerAddress, DeviceID, deviceCert, azureCert: new X509Certificate(rootCA));
var isOpen = azureIoTClient.Open();
Debug.WriteLine($"Connection is open: {isOpen}");
while (true)
{
try
{
// set higher sampling and perform a synchronous measurement
i2CBmp280.TemperatureSampling = Sampling.LowPower;
i2CBmp280.PressureSampling = Sampling.UltraHighResolution;
var readResult = i2CBmp280.Read();
// led on
led.Write(pin, PinValue.High);
Thread.Sleep(lightTime);
// print out the measured data
string temperature = readResult.Temperature.DegreesCelsius.ToString("F");
string pressure = readResult.Pressure.Hectopascals.ToString("F");
Debug.WriteLine("-----------------------------------------");
Debug.WriteLine($"Temperature: {temperature}\u00B0C");
Debug.WriteLine($"Pressure: {pressure}hPa");
// send to Iot Hub
string message = $"{{\"Temperature\":{temperature},\"Pressure\":{pressure},\"DeviceID\":\"{DeviceID}\"}}";
azureIoTClient.SendMessage(message);
Debug.WriteLine($"Data is pushed to Iot Hub: {message}");
// led off
led.Write(pin, PinValue.Low);
Thread.Sleep(dimTime);
}
catch (Exception ex)
{
Debug.WriteLine($"An error occured: {ex.Message}");
}
}
}
public static void Main()
{
Console.WriteLine($".Net IoT with BMP280 Sensor!");
// set up for LED and pin
using GpioController led = new();
led.OpenPin(pin, PinMode.Output);
// setup for BMP280
I2cConnectionSettings i2cSettings = new(busId, Bmp280.DefaultI2cAddress);
I2cDevice i2cDevice = I2cDevice.Create(i2cSettings);
using var i2CBmp280 = new Bmp280(i2cDevice);
// Create an X.509 certificate object.
var cert = new X509Certificate2($"{DeviceID}.pfx", "1234");
var auth = new DeviceAuthenticationWithX509Certificate(DeviceID, cert);
DeviceClient azureIoTClient = DeviceClient.Create(IotBrokerAddress, auth, TransportType.Mqtt);
if (azureIoTClient == null)
{
Console.WriteLine("Failed to create DeviceClient!");
}
else
{
Console.WriteLine("Successfully created DeviceClient!");
Console.WriteLine("Press CTRL+D to stop application");
}
while (true)
{
try
{
// set higher sampling and perform a synchronous measurement
i2CBmp280.TemperatureSampling = Sampling.LowPower;
i2CBmp280.PressureSampling = Sampling.UltraHighResolution;
var readResult = i2CBmp280.Read();
// led on
led.Write(pin, PinValue.High);
Thread.Sleep(lightTime);
// print out the measured data
string temperature = readResult.Temperature?.DegreesCelsius.ToString("F");
string pressure = readResult.Pressure?.Hectopascals.ToString("F");
Console.WriteLine("-----------------------------------------");
Console.WriteLine($"Temperature: {temperature}\u00B0C");
Console.WriteLine($"Pressure: {pressure}hPa");
// send to Iot Hub
string message = $"{{\"Temperature\":{temperature},\"Pressure\":{pressure},\"DeviceID\":\"{DeviceID}\"}}";
Message eventMessage = new Message(Encoding.UTF8.GetBytes(message));
azureIoTClient.SendEventAsync(eventMessage).Wait();
Console.WriteLine($"Data is pushed to Iot Hub: {message}");
// blink and led off
led.Write(pin, PinValue.Low);
Thread.Sleep(75);
led.Write(pin, PinValue.High);
Thread.Sleep(75);
led.Write(pin, PinValue.Low);
Thread.Sleep(75);
led.Write(pin, PinValue.High);
Thread.Sleep(75);
led.Write(pin, PinValue.Low);
Thread.Sleep(dimTime);
}
catch (Exception ex)
{
Console.WriteLine($"An error occured: {ex.Message}");
}
}
}