Meadow.Foundation.Leds.RgbLed

RgbLed
Status
Source code	GitHub
NuGet package

RgbLed represents an RGB LED whose color is controlled by three digital output ports. These diodes consist of four legs - one for each of the colors mentioned and one for a common cathode (ground) or common anode (vcc), which is also the longest one.

To connect these deds to Meadow, it is recommended to use an external resistor of ~270 to 1K ohms to prevent too much current from flowing through the led and causing damage.

Circuit of a common anode RGB LED

Circuit of a common cathode RGB LED

Code Example

protected List<RgbLed> rgbLeds;

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

    rgbLeds = new List<RgbLed>
    {
        new RgbLed(
            Device.CreateDigitalOutputPort(Device.Pins.D02),
            Device.CreateDigitalOutputPort(Device.Pins.D03),
            Device.CreateDigitalOutputPort(Device.Pins.D04)),
        new RgbLed(
            Device.CreateDigitalOutputPort(Device.Pins.D05),
            Device.CreateDigitalOutputPort(Device.Pins.D06),
            Device.CreateDigitalOutputPort(Device.Pins.D07)),
        new RgbLed(
            Device.CreateDigitalOutputPort(Device.Pins.D08),
            Device.CreateDigitalOutputPort(Device.Pins.D09),
            Device.CreateDigitalOutputPort(Device.Pins.D10)),
        new RgbLed(
            Device.CreateDigitalOutputPort(Device.Pins.D11),
            Device.CreateDigitalOutputPort(Device.Pins.D12),
            Device.CreateDigitalOutputPort(Device.Pins.D13))
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    Resolver.Log.Info("TestRgbLeds...");

    while (true)
    {
        Resolver.Log.Info("Going through each color on each RGB LED...");
        foreach (var rgbLed in rgbLeds)
        {
            for (int i = 0; i < (int)RgbLedColors.count; i++)
            {
                rgbLed.SetColor((RgbLedColors)i);
                await Task.Delay(500);
            }
        }

        await Task.Delay(1000);

        Resolver.Log.Info("Blinking through each color on each RGB LED (on 500ms / off 500ms)...");
        foreach (var rgbLed in rgbLeds)
        {
            for (int i = 0; i < (int)RgbLedColors.count; i++)
            {
                await rgbLed.StartBlink((RgbLedColors)i);
                await Task.Delay(3000);
                await rgbLed.StopAnimation();
                rgbLed.IsOn = false;
            }
        }

        await Task.Delay(1000);

        Resolver.Log.Info("Blinking through each color on each RGB LED (on 1s / off 1s)...");
        foreach (var rgbLed in rgbLeds)
        {
            for (int i = 0; i < (int)RgbLedColors.count; i++)
            {
                await rgbLed.StartBlink((RgbLedColors)i, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(1));
                await Task.Delay(3000);
                await rgbLed.StopAnimation();
                rgbLed.IsOn = false;
            }
        }

        await Task.Delay(1000);
    }
}

Sample project(s) available on GitHub