Meadow.Foundation.Sensors.Camera.Mlx90640 1.3.4.1-beta

Meadow.Foundation.Sensors.Camera.Mlx90640

Mlx90640 I2C far infrared thermal sensor array camera

The Mlx90640 library is designed for the Wilderness Labs Meadow .NET IoT platform and is part of Meadow.Foundation.

The Meadow.Foundation peripherals library is an open-source repository of drivers and libraries that streamline and simplify adding hardware to your C# .NET Meadow IoT application.

For more information on developing for Meadow, visit developer.wildernesslabs.co.

To view all Wilderness Labs open-source projects, including samples, visit github.com/wildernesslabs.

Usage

Mlx90640 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");

    var i2cBus = Device.CreateI2cBus(I2cBusSpeed.Fast);
    sensor = new Mlx90640(i2cBus);

    return Task.CompletedTask;
}

public override Task Run()
{
    bool showTempArrayAsAsciiArt = false;

    Resolver.Log.Info("Run sample...");

    float[] frame;

    Resolver.Log.Info($"Serial #:{sensor.SerialNumber}");

    sensor.SetMode(Mlx90640.Mode.Chess);
    Resolver.Log.Info($"Current Mode: {sensor.GetMode()}");

    sensor.SetResolution(Mlx90640.Resolution.EighteenBit);
    Resolver.Log.Info($"Current resolution: {sensor.GetResolution()}");

    sensor.SetRefreshRate(Mlx90640.RefreshRate._2hz);
    Resolver.Log.Info($"Current frame rate: {sensor.GetRefreshRate()}");

    Resolver.Log.Info($"Broken Pixels: {sensor.Config.BrokenPixels.Count}");
    Resolver.Log.Info($"Outlier Pixels: {sensor.Config.OutlierPixels.Count}");
    Resolver.Log.Info($"Broken Pixels has adjacent broken pixel: {sensor.Config.BrokenPixelHasAdjacentBrokenPixel}");
    Resolver.Log.Info($"Broken Pixels has adjacent Outlier pixel: {sensor.Config.BrokenPixelHasAdjacentOutlierPixel}");
    Resolver.Log.Info($"Outlier Pixels has adjacent Outlier pixel: {sensor.Config.OutlierPixelHasAdjacentOutlierPixel}");

    Thread.Sleep(2000);

    while (true)
    {
        Thread.Sleep(1000);

        frame = sensor.ReadRawData();

        Resolver.Log.Info("");

        //Print out each value
        for (byte h = 0; h < 24; h++)
        {
            StringBuilder logLine = new StringBuilder();
            for (byte w = 0; w < 32; w++)
            {
                float t = frame[h * 32 + w];
                //View sensor data as ascii art. It is easier to see shapes, like your fingers.
                if (!showTempArrayAsAsciiArt)
                {
                    //Write the Temp value
                    logLine.Append($"{t:0},");
                }
                else
                {
                    //Write the ascii art character
                    char c = '&';
                    if (t < 68) c = ' ';
                    else if (t < 73.4) c = '.';
                    else if (t < 77) c = '-';
                    else if (t < 80.6) c = '*';
                    else if (t < 84) c = '+';
                    else if (t < 87) c = 'x';
                    else if (t < 91) c = '%';
                    else if (t < 95) c = '#';
                    else if (t < 98.6) c = '$';
                    logLine.Append(c);
                }
            }

            Resolver.Log.Info(logLine.ToString());
        }
    }
}

How to Contribute

• Found a bug? Report an issue
• Have a feature idea or driver request? Open a new feature request
• Want to contribute code? Fork the Meadow.Foundation repository and submit a pull request against the develop branch

Need Help?

If you have questions or need assistance, please join the Wilderness Labs community on Slack.