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Software/CSharp/GrovePi/Sensors/TemperatureSensor.cs

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