Meadow.Foundation.Sensors.Hid.Mpr121

Mpr121
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

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

    var sensor = new Mpr121(Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard), 90, 100);
    sensor.ChannelStatusesChanged += Sensor_ChannelStatusesChanged;

    return Task.CompletedTask;
}

private void Sensor_ChannelStatusesChanged(object sender, ChannelStatusChangedEventArgs e)
{
    string pads = string.Empty;

    for (int i = 0; i < e.ChannelStatus.Count; i++)
    {
        if (e.ChannelStatus[(Mpr121.Channels)i] == true)
        {
            pads += i + ", ";
        }
    }

    var msg = string.IsNullOrEmpty(pads) ? "none" : (pads + "touched");
    Resolver.Log.Info(msg);
}

Sample project(s) available on GitHub

Wiring Example

To wire a Mpr121 to your Meadow board, connect the following:

Mpr121	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

Code Example​

Wiring Example​

Code Example

Wiring Example