Keypad-PCF8574

Keypad driver using a PCF8574

This driver uses a PCF8574 I/O port expander to drive/scan a keypad. The number of rows and columns is user configurable, such as the I2C slave address of the PCF8574 and the GPIO used for the interrupt.

Solutions

• Keypad driver
• Keypad demo app

NuGet package

A NuGet package with the driver is available here.

Demo app

A demo application is included to illustrate the configuration of the driver and handling the key pressed/released events.

Hardware used:

• nanoFramework board PalThree from OrgPal.
• The PCF8574 used it's assembled in a module from TECNOIOT.
• The 4x4 Matrix Keypad is from AZ-Delivery.

Contributor: OrgPal