How does the Amazon Dash button work? This question was originally answered on Quora by Jonathan Brill.

How Does a Rotary Encoder Module Work and how to Interface it with Arduino? Published May 30, 2022 0 D Debashis Das Author ...

In this tutorial we use SPI Protocol for communication between two Arduinos. Here one Arduino will act as Master and another one will act as Slave, two LEDs and push buttons will be connected to both ...