Temperature Humidity and Pressure Sensor Problems

amurrell · December 22, 2017, 7:22pm

I’m having trouble getting a valid result from this Temperature Humidity and Pressure Sensor on the GrovePI using Windows IoT Core and any the provided samples.

https://www.dexterindustries.com/shop/temperature-humidity-pressure-sensor/

In looking on the Dexter GitHub repos, I found the following two implementations for interacting with Temp, Humidity and Pressure Sensors, neither of which seem to apply to this sensor:

github.com

DexterInd/GrovePi/blob/master/Software/CSharp/GrovePi/Sensors/DHTTemperatureAndHumiditySensor%20.cs

using System;
using GrovePi.Common;

namespace GrovePi.Sensors
{
    public interface IDHTTemperatureAndHumiditySensor
    {
        double TemperatureInCelsius { get; }
        double TemperatureInFahrenheit { get; }
        double Humidity { get; }
        void Measure();
    }

    /// <summary>
    /// Specifies the model of sensor. 
    /// DHT11 - blue one - comes with the GrovePi+ Starter Kit.
    /// DHT22 - white one, aka DHT Pro or AM2302.
    /// DHT21 - black one, aka AM2301.
    /// </summary>
    public enum DHTModel

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(seems to be an implementation for a sensor that is built to work with the analog ports and not the one in question that I have). This fails to get data from the sensor in question.

github.com

DexterInd/GrovePi/blob/master/Software/CSharp/GrovePi/I2CDevices/SHTTemperatureAndHumiditySensor.cs

using Windows.Devices.I2c;

namespace GrovePi.I2CDevices
{
    /// <summary>
    /// 
    /// </summary>
    public interface ISHTTemperatureAndHumiditySensor
    {
        double TemperatureInCelsius { get; }
        double TemperatureInFahrenheit { get; }
        double RelativeHumidity { get; }
        void Measure();
    }

    /// <summary>
    /// Specifies the model of sensor.
    /// </summary>
    public enum SHTModel
    {

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(clearly references the SHT31 as the intended sensor). This gives return values of 0 although it doesn’t throw exceptions.

Where can I find sample for this sensor?

https://www.dexterindustries.com/shop/temperature-humidity-pressure-sensor/

JohnC · December 26, 2017, 10:35am

Indeed, the sensors you have listed are not supported in the Windows IoT Core operating system C# libraries. The examples that are in the C# libraries are for the Grove temp and humidity sensor.

You can however use the Python examples for these sensors, located in the DI_Sensors repo here (Win IOT runs Python as well).

amurrell · January 2, 2018, 3:10pm

Thanks John

This is very helpful. We were pulling our hair out for a bit thinking we were doing something wrong!