The library files provide useful functions to make it easy to communicate with matrix keypads (like a 4x4 keypad) that use the I2C communication protocol. The demo program shows the usage of the ...

The data entered through the 4x4 keypad is sent to the Arduino via the I2C communication protocol. The degree command entered is sent to the A4988 module by the Arduino, and the stepper motor moves to ...

If you want to add a keypad to your Arduino project, the options are pretty limited. There’s that red and blue 4×4 membrane we’ve all seen in password-protected door lock projects, and the phone ...

The interfacing between the Arduino with I2C is being explained in this project. The interfacing between the Arduino with I2C is being explained in this project. One good thing about using the readily ...

[Johngineer] found himself in need of an I2C sniffer, but didn’t have one available. Necessity is the mother of invention, so he put together this I2C sniffer sketch for Arduino. The arduino will ...