33 lines
919 B
C#
33 lines
919 B
C#
using System;
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namespace GrovePi.Sensors
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{
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public interface ITemperatureSensor
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{
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double TemperatureInCelsius();
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}
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/// <summary>
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/// Temperature Sensor V1.1 & 1.2
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/// ref: <http://wiki.seeed.cc/Grove-Temperature_Sensor_V1.2/>
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/// </summary>
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internal class TemperatureSensor : ITemperatureSensor
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{
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private readonly IGrovePi _device;
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private readonly Pin _pin;
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internal TemperatureSensor(IGrovePi device, Pin pin)
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{
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if (device == null) throw new ArgumentNullException(nameof(device));
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_device = device;
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_pin = pin;
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}
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public double TemperatureInCelsius()
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{
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var result = (double)_device.AnalogRead(_pin);
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var resistance = (1023 - result) * 10000 / result;
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return 1 / (Math.Log(resistance / 10000) / 4275 + 1 / 298.15) - 273.15;
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}
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}
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}
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