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Measure Temperature, Humidity and Pressure using Adafruit BME280 and Windows IoT Core

License: MIT License

C# 100.00%

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Humidity accuracy after app crash or power down

hi Guys

I have a question, maybe someone has some advice for me.
I am working on my home automation system with a Raspberry Pi3 and Windows 10 IOT Core.

As UI I use a UWP app on which I want to display the temperature & humidity.

My Code:

        private async void GetHumidity()
        {
            try
            {
                var humidity = await bme280Sensor.ReadHumidity();
                txtHumidity.Text = double.Parse(humidity.ToString().Split('.')[0]).ToString() + "%";
            }
            catch (Exception ex)
            {
                Debug.WriteLine(ex.Message);
                Debug.WriteLine(ex.StackTrace);
            }
        }

        private async void GetTemp()
        {
            try
            {
                var temp = await bme280Sensor.ReadTemperature();                
                txtTemp.Text = double.Parse(temp.ToString().Split('.')[0]).ToString() + "°C";
            }
            catch (Exception ex)
            {
                Debug.WriteLine(ex.Message);
                Debug.WriteLine(ex.StackTrace);
            }
        }

This works fine, but if I take the Pi from power (plug pull) and then restart, the humidity is twice or more higher.

When I then restart my UWP app via the IOT Device Manager in the browser, the correct values are displayed again.

What I am doing wrong? Is something cached after a "chrash" or power down?

Thx

Greez,
Dark!

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