/// <summary>
/// Starts continuously sampling the sensor.
///
/// This method also starts raising `Changed` events and IObservable
/// subscribers getting notified. Use the `readIntervalDuration` parameter
/// to specify how often events and notifications are raised/sent.
/// </summary>
/// <param name="sampleCount">How many samples to take during a given
/// reading. These are automatically averaged to reduce noise.</param>
/// <param name="sampleIntervalDuration">The time, in milliseconds,
/// to wait in between samples during a reading.</param>
/// <param name="standbyDuration">The time, in milliseconds, to wait
/// between sets of sample readings. This value determines how often
/// `Changed` events are raised and `IObservable` consumers are notified.</param>
public void StartUpdating(
int sampleCount = 10,
int sampleIntervalDuration = 40,
int standbyDuration = 100)
{
AnalogInputPort.StartSampling(sampleCount, sampleIntervalDuration, standbyDuration);
}
/// <summary>
/// Create a new ADXL335 sensor object.
/// </summary>
/// <param name="x">Analog pin connected to the X axis output from the ADXL335 sensor.</param>
/// <param name="y">Analog pin connected to the Y axis output from the ADXL335 sensor.</param>
/// <param name="z">Analog pin connected to the Z axis output from the ADXL335 sensor.</param>
/// <param name="updateInterval">Update interval for the sensor, set to 0 to put the sensor in polling mode.</param>
/// <<param name="accelerationChangeNotificationThreshold">Acceleration change threshold.</param>
public ADXL335(IAnalogPin x, IAnalogPin y, IAnalogPin z, ushort updateInterval = 100,
double accelerationChangeNotificationThreshold = 0.1F)
{
if ((updateInterval != 0) && (updateInterval < MinimumPollingPeriod))
{
throw new ArgumentOutOfRangeException(nameof(updateInterval),
"Update interval should be 0 or greater than " + MinimumPollingPeriod);
}
_x = new AnalogInputPort(x);
_y = new AnalogInputPort(y);
_z = new AnalogInputPort(z);
//
// Now set the default calibration data.
//
XVoltsPerG = 0.325;
YVoltsPerG = 0.325;
ZVoltsPerG = 0.550;
SupplyVoltage = 3.3;
if (updateInterval > 0)
{
StartUpdating();
}
else
{
Update().RunSynchronously();
}
}
void StartSampling()
{
int sampleCount = samplingSetting.sampleCount;
int sampleIntervalDuration = samplingSetting.sampleIntervalDuration;
int standbyDuration = samplingSetting.standbyDuration;
var counter = 0;
var total = 0f;
var average = 0f;
for (int i = 0; i < sampleCount; i++)
{
// read the voltage
float temp = AnalogInputPort.ReadValue();
total += temp;
counter++;
average = total / counter;
if (!IsSampling)
{
break;
}
Thread.Sleep(sampleIntervalDuration);
}
IsSampling = false;
RaiseChangedAndNotify(new FloatChangeResult(average, 0));
}
void StartSampling()
{
int sampleCount = samplingSetting.sampleCount;
int sampleIntervalDuration = samplingSetting.sampleIntervalDuration;
int standbyDuration = samplingSetting.standbyDuration;
var counter = 0;
var total = 0f;
var average = 0f;
for (int i = 0; i < sampleCount; i++)
{
// read the voltage
float voltage = AnalogInputPort.ReadValue();
// (sampleCount, sampleIntervalDuration);
// convert and save to our temp property for later retreival
var temp = VoltageToTemperature(voltage);
total += temp;
counter++;
average = total / counter;
if (!IsSampling)
{
break;
}
Thread.Sleep(sampleIntervalDuration);
}
IsSampling = false;
RaiseEventsAndNotify
(
new AtmosphericConditionChangeResult(new AtmosphericConditions(average, 0, 0), null)
);
}
/// <summary>
/// Convenience method to get the current temperature. For frequent reads, use
/// StartSampling() and StopSampling() in conjunction with the SampleBuffer.
/// </summary>
/// <param name="sampleCount">The number of sample readings to take.
/// Must be greater than 0. These samples are automatically averaged.</param>
/// <param name="sampleIntervalDuration">The time, in milliseconds,
/// to wait in between samples during a reading.</param>
/// <returns>A float value that's ann average value of all the samples taken.</returns>
public async Task<AtmosphericConditions> Read(int sampleCount = 10, int sampleIntervalDuration = 40)
{
// read the voltage
float voltage = await AnalogInputPort.Read(sampleCount, sampleIntervalDuration);
// convert and save to our temp property for later retreival
Temperature = VoltageToTemperature(voltage);
// return
return new AtmosphericConditions(Temperature, 0, 0);
//return Temperature;
}
/// <summary>
/// Convenience method to get the current soil moisture. For frequent reads, use
/// StartUpdating() and StopUpdating().
/// </summary>
/// <param name="sampleCount">The number of sample readings to take.
/// Must be greater than 0.</param>
/// <param name="sampleInterval">The interval, in milliseconds, between
/// sample readings.</param>
/// <returns></returns>
public async Task <float> Read(int sampleCount = 10, int sampleInterval = 40)
{
// read the voltage
float voltage = await AnalogInputPort.Read(sampleCount, sampleInterval);
// convert and save to our temp property for later retrieval
Moisture = VoltageToMoisture(voltage);
// return
return(Moisture);
}
/// <summary>
/// Convenience method to get the current soil moisture. For frequent reads, use
/// StartUpdating() and StopUpdating().
/// </summary>
/// <param name="sampleCount">The number of sample readings to take.
/// Must be greater than 0.</param>
/// <param name="sampleInterval">The interval, in milliseconds, between
/// sample readings.</param>
/// <returns></returns>
public async Task <float> Read(int sampleCount = 10, int sampleInterval = 40)
{
DigitalPort.State = true;
float voltage = await AnalogInputPort.Read(sampleCount, sampleInterval);
DigitalPort.State = false;
// convert and save to our temp property for later retrieval
Moisture = VoltageToMoisture(voltage);
return(Moisture);
}
/// <summary>
/// Convenience method to get the current temperature. For frequent reads, use
/// StartSampling() and StopSampling() in conjunction with the SampleBuffer.
/// </summary>
/// <param name="sampleCount">The number of sample readings to take.
/// Must be greater than 0. These samples are automatically averaged.</param>
/// <param name="sampleIntervalDuration">The time, in milliseconds,
/// to wait in between samples during a reading.</param>
/// <returns>A float value that's ann average value of all the samples taken.</returns>
public async Task <float> Read(int sampleCount = 10, int sampleIntervalDuration = 40)
{
// read the voltage
float voltage = await AnalogInputPort.Read(sampleCount, sampleIntervalDuration);
// convert and save to our temp property for later retreival
WaterLevel = VoltageToWaterLevel(voltage);
// return
return(WaterLevel);
}
/// <summary>
/// Convenience method to get the current soil moisture. For frequent reads, use
/// StartUpdating() and StopUpdating().
/// </summary>
/// <param name="sampleCount">The number of sample readings to take.
/// Must be greater than 0.</param>
/// <param name="sampleInterval">The interval, in milliseconds, between
/// sample readings.</param>
/// <returns></returns>
public async Task <FloatChangeResult> Read(int sampleCount = 10, int sampleInterval = 40)
{
// save previous moisture value
float previousMoisture = Moisture;
// read the voltage
float voltage = await AnalogInputPort.Read(sampleCount, sampleInterval);
// convert and save to our temp property for later retrieval
Moisture = VoltageToMoisture(voltage);
// return new and old Moisture values
return(new FloatChangeResult(Moisture, previousMoisture));
}
/// <summary>
/// Convenience method to get the current soil moisture. For frequent reads, use
/// StartUpdating() and StopUpdating().
/// </summary>
/// <param name="sampleCount">The number of sample readings to take.
/// Must be greater than 0.</param>
/// <param name="sampleInterval">The interval, in milliseconds, between
/// sample readings.</param>
/// <returns></returns>
public float Read(int sampleCount = 10, int sampleInterval = 40)
{
float voltage = 0;
// read the voltage
for (int i = 0; i < sampleCount; i++)
{
var tmp = AnalogInputPort.ReadValue();
voltage += tmp;
Thread.Sleep(sampleInterval);
}
voltage /= sampleCount;
// convert and save to our temp property for later retrieval
Moisture = VoltageToMoisture(voltage);
// return
return(Moisture);
}
/// <summary>
/// Convenience method to get the current soil moisture. For frequent reads, use
/// StartUpdating() and StopUpdating().
/// </summary>
/// <param name="sampleCount">The number of sample readings to take.
/// Must be greater than 0.</param>
/// <param name="sampleInterval">The interval, in milliseconds, between
/// sample readings.</param>
/// <returns></returns>
public float Read(int sampleCount = 10, int sampleInterval = 40)
{
DigitalPort.Write(GpioPinValue.High);
//float voltage = await AnalogInputPort.Read(sampleCount, sampleInterval);
float voltage = 0;
// read the voltage
for (int i = 0; i < sampleCount; i++)
{
var tmp = AnalogInputPort.ReadValue();
voltage += tmp;
Thread.Sleep(sampleInterval);
}
voltage /= sampleCount;
DigitalPort.Write(GpioPinValue.Low);
// convert and save to our temp property for later retrieval
Moisture = VoltageToMoisture(voltage);
return(Moisture);
}
/// <summary>
/// Stops sampling the temperature.
/// </summary>
public void StopUpdating()
{
AnalogInputPort.StopSampling();
}
public AnalogTemperature(
IAnalogInputPort analogInputPort,
KnownSensorType sensorType,
Calibration calibration = null
)
{
this.AnalogInputPort = analogInputPort;
//
// If the calibration object is null use the defaults for TMP35.
//
if (calibration == null)
{
calibration = new Calibration();
}
switch (sensorType)
{
case KnownSensorType.TMP35:
case KnownSensorType.LM35:
case KnownSensorType.LM45:
_yIntercept = 0;
_millivoltsPerDegreeCentigrade = 10;
break;
case KnownSensorType.LM50:
case KnownSensorType.TMP36:
_yIntercept = 500;
_millivoltsPerDegreeCentigrade = 10;
break;
case KnownSensorType.TMP37:
_yIntercept = 0;
_millivoltsPerDegreeCentigrade = 20;
break;
case KnownSensorType.Custom:
_yIntercept = calibration.MillivoltsAtSampleReading - (calibration.SampleReading * calibration.MillivoltsAtSampleReading);
_millivoltsPerDegreeCentigrade = calibration.MillivoltsPerDegreeCentigrade;
break;
default:
throw new ArgumentException("Unknown sensor type", nameof(sensorType));
}
// wire up our observable
// have to convert from voltage to temp units for our consumers
// this is where the magic is: this allows us to extend the IObservable
// pattern through the sensor driver
AnalogInputPort.Subscribe(
new FilterableObserver <FloatChangeResult, float>(
h => {
var newTemp = VoltageToTemperature(h.New);
var oldTemp = VoltageToTemperature(h.Old);
this.Temperature = newTemp; // save state
RaiseEventsAndNotify(
new AtmosphericConditionChangeResult(
new AtmosphericConditions(newTemp, 0, 0),
new AtmosphericConditions(oldTemp, 0, 0)
));
})
);
}
/// <summary>
/// Create a new light sensor object using a dynaic reference voltage.
/// </summary>
/// <param name="pin">Analog channel connected to the sensor.</param>
/// <param name="referenceVoltagePin">Analog channel connected to the reference voltage souce.</param>
public ALSPT19315C(IAnalogPin pin, IAnalogPin referenceVoltagePin)
{
_sensor = new AnalogInputPort(pin);
_referenceVoltagePort = new AnalogInputPort(referenceVoltagePin);
}
/// <summary>
/// Create a new light sensor object using a static reference voltage.
/// </summary>
/// <param name="pin">AnalogChannel connected to the sensor.</param>
/// <param name="referenceVoltage">Reference voltage.</param>
public ALSPT19315C(IAnalogPin pin, double referenceVoltage)
{
_sensor = new AnalogInputPort(pin);
_referenceVoltagePort = null;
_referenceVoltage = referenceVoltage;
}
