Check out the Wikipedia page on SPI, which includes lots of good information on SPI and other synchronous interfaces. This page presents a more correct way to set up an SPI network amongst your embedded devices, particularly for use with an Arduino microcontroller.

In this guide on SPI communication, you will grasp the concepts of SPI communication protocol which is also known as Serial Peripheral Interface, is a digital communication protocol that is used to transfer data serially (one bit at a time) between two or more digital devices like microcontrollers, microprocessors, or other devices.

Serial Peripheral Interface (SPI) is a de facto standard (with many variants) for synchronous serial communication, used primarily in embedded systems for short-distance wired communication between integrated circuits.

There are two control lines for SPI. The controller, usually a microcontroller or DSP, controls a peripheral select and the serial clock used for data synchronization. An SPI bus can control multiple peripherals

SPI or Serial Peripheral Interface was developed by Motorola in the 1980’s as a standard, low – cost and reliable interface between the Microcontroller (microcontrollers by Motorola in the beginning) and its peripheral ICs.

SPI is a communication protocol used to interface a variety of sensors and modules to microcontrollers. This easy to understand guide will explain how it works.

SPI stands for Serial Peripheral Interface. It is a protocol that is synchronous serial communication. It is used to communicate between the peripheral devices i.e. input and output devices and microcontrollers. It is allowed to transfer high-speed data. It is popular with digital communication applications and embedded systems.