The Raspberry.IO.GeneralPurpose.dll assembly provides access to the Raspberry Pi GPIO pins. This project is available under a compiled, Nuget form: see Raspberry.IO.GeneralPurpose Nuget.

Raspberry.IO.GeneralPurpose namespace contains classes that provide three different levels of abstraction from the GPIO hardware pins:

• IGpioConnectionDriver interface and implementations provide raw, low-level access to the GPIO hardware.
• GpioConnection, GpioConnectionSettings, PinConfiguration and related classes provide managed access to input/output pins
• PinsBehavior class and inheritors provide a way to group multiple output pins and affect them a common behavior.

Some components located in other Raspberry.IO namespaces, such as Raspberry.IO.Components, are based on IGpioConnectionDriver.

The Test.Gpio.Chaser project provides a sample using the GPIO pins.

Basic access to the Raspberry Pi GPIO is done as follows:

using Raspberry.IO.GeneralPurpose;

Following Raspberry Pin Numbering information.

Here, as an output pin for pin P1-11.

var led1 = ConnectorPin.P1Pin11.Output();

Pins are passed as an argument of GpioConnection initializer.

var connection = new GpioConnection(led1);

The following code toggle led status every 250ms.

for(var i = 0; i < 100; i++){
    connection.Toggle(led1);
    System.Threading.Thread.Sleep(250);
}

connection.Close();