Ejemplo n.º 1
0
        public Task <Temps> ReadThermometer(int index)
        {
            // Get a random raw value 0 - 499 kelvin
            int    kelvin  = this.random.Next(0, 500);
            double celcius = TempUtils.KelvinToCelcius(kelvin);
            var    temps   = new Temps
            {
                Kelvin      = kelvin,
                Celcius     = celcius,
                Farenheight = TempUtils.CelciusToFarenheight(celcius),
            };

            return(Task.FromResult(temps));
        }
Ejemplo n.º 2
0
        public async Task <Temps> ReadThermometer(int index)
        {
            if (index < 0 || index > 7)
            {
                throw new IndexOutOfRangeException("Index must be from 0-7");
            }

            using (await this.thermometerLock.LockAsync())
            {
                await this.initTask;

                double    sum        = 0;
                const int numSamples = 3;
                for (int i = 0; i < numSamples; i++)
                {
                    var reading = this.mcp.Read(Channels[index]);
                    sum += reading.NormalizedValue;
                    await Task.Delay(100);
                }

                double averageValue = sum / numSamples;

                //Debug.WriteLine($"Reading for thermometer {index} is {reading.RawValue}, Normalized: {reading.NormalizedValue}");

                double voltage    = averageValue * InputVoltage;
                double resistance = TempUtils.GetThermistorResistenceFromVoltage(3.3, voltage, BalancingResistorOhms);
                //Debug.WriteLine($"Got Resistance {resistance} from voltage {voltage}");

                CoefficientSet coefficients = Coefficients[0];

                var temps = new Temps();
                if (double.IsInfinity(resistance))
                {
                    temps.Kelvin = 0;
                }
                else
                {
                    temps.Kelvin = TempUtils.ResistanceToTemp(coefficients.A, coefficients.B, coefficients.C, resistance);
                }

                temps.Celcius     = TempUtils.KelvinToCelcius(temps.Kelvin);
                temps.Farenheight = TempUtils.CelciusToFarenheight(temps.Celcius);

                return(temps);
            }
        }
Ejemplo n.º 3
0
        public void TestTheseNumbers()
        {
            double a, b, c;

            a = -1.373357407E-3;
            b = 4.914938378E-4;
            c = -5.890760444E-7;

            double tempK = TempUtils.ResistanceToTemp(a, b, c, 101219);

            Assert.AreEqual(295, Math.Round(tempK));

            double tempC = TempUtils.KelvinToCelcius(tempK);

            Assert.AreEqual(22, Math.Round(tempC));

            double tempF = TempUtils.CelciusToFarenheight(tempC);

            Assert.AreEqual(71, Math.Round(tempF));
        }
Ejemplo n.º 4
0
        public void TestAgain()
        {
            // 33500 / 122F
            double a, b, c;

            a = -1.373357407E-3;
            b = 4.914938378E-4;
            c = -5.890760444E-7;

            double tempK = TempUtils.ResistanceToTemp(a, b, c, 33500);

            Assert.AreEqual(325, Math.Round(tempK));

            double tempC = TempUtils.KelvinToCelcius(tempK);

            Assert.AreEqual(51, Math.Round(tempC));

            double tempF = TempUtils.CelciusToFarenheight(tempC);

            Assert.AreEqual(124, Math.Round(tempF));
        }