/// <summary>
/// Create a DHT sensor
/// </summary>
/// <param name="pin">The pin number (GPIO number)</param>
/// <param name="dhtType">The DHT Type, either Dht11 or Dht22</param>
/// <param name="pinNumberingScheme">The GPIO pin numbering scheme</param>
public DhtSensor(int pin, DhtType dhtType, PinNumberingScheme pinNumberingScheme = PinNumberingScheme.Logical)
{
_protocol = CommunicationProtocol.OneWire;
_controller = new GpioController(pinNumberingScheme);
_pin = pin;
SetDevice(dhtType);
_controller.OpenPin(_pin);
// delay 1s to make sure DHT stable
Thread.Sleep(1000);
}
/// <summary>
/// Initialize the DHT Sensor class
/// </summary>
/// <param name="grovePi">The GrovePi class</param>
/// <param name="port">The grove Port, need to be in the list of SupportedPorts</param>
/// <param name="dhtType">The DHT type</param>
public DhtSensor(GrovePi grovePi, GrovePort port, DhtType dhtType)
{
if (!SupportedPorts.Contains(port))
{
throw new ArgumentException($"Grove port {port} not supported.", nameof(port));
}
_grovePi = grovePi;
DhtType = dhtType;
_port = port;
// Ask for the temperature so we will have one in cache
_grovePi.WriteCommand(GrovePiCommand.DhtTemp, _port, (byte)DhtType, 0);
}
/// <summary>
/// Initialise the sensor instance with the corresponding device based on DhtType.
/// </summary>
private void SetDevice(DhtType type)
{
switch (type)
{
case DhtType.Dht11:
_device = new Dht11Device();
break;
case DhtType.Dht12:
case DhtType.Dht21:
case DhtType.Dht22:
_device = new Dht22Device();
break;
}
}
/// <summary>
/// Creates a specific DHT sensor class.
/// </summary>
/// <param name="type">The type of DHT sensor to create.</param>
/// <param name="dataPin">The data pin. Must be a GPIO-only pin on the P1 Header of the Pi.</param>
/// <returns>The instance of the specific DHT sensor.</returns>
public static DhtSensor Create(DhtType type, IGpioPin dataPin)
{
switch (type)
{
case DhtType.Dht12:
return(new Dht12(dataPin));
case DhtType.Dht21:
case DhtType.AM2301:
return(new Dht21(dataPin));
case DhtType.Dht22:
case DhtType.AM2302:
return(new Dht22(dataPin));
default:
return(new Dht11(dataPin));
}
}
/// <summary>
/// Creates a specific DHT sensor class.
/// </summary>
/// <param name="type">The type of DHT sensor to create.</param>
/// <param name="dataPin">The data pin. Must be a GPIO-only pin on the P1 Header of the Pi.</param>
/// <returns>The instance of the specific DHT sensor.</returns>
public static DhtSensor Create(DhtType type, IGpioPin dataPin) =>
type switch
{
/// <summary>
/// Create a DHT sensor
/// </summary>
/// <param name="pin">The pin number (GPIO number)</param>
/// <param name="dhtType">The DHT Type, either Dht11 or Dht22</param>
public DHTSensor(int pin, DhtType dhtType)
{
this._pin = pin;
this._dhtType = dhtType;
_controller.OpenPin(pin);
}
/// <summary>
/// Create a DHT sensor through I2C (Only DHT12)
/// </summary>
/// <param name="sensor">I2C Device, like UnixI2cDevice or Windows10I2cDevice</param>
public DhtSensor(I2cDevice sensor)
{
_protocol = CommunicationProtocol.I2C;
_sensor = sensor;
_dhtType = DhtType.Dht12;
}