SPI Communication Explained: How It Works & 4 SPI Modes

Want to understand SPI communication with Arduino? In this video, we break down SPI from the basics to the Arduino SPI library — including MOSI, MISO, SCK, Chip Select, full-duplex communication, timing diagrams, and all 4 SPI modes.

SPI (Serial Peripheral Interface) is one of the most commonly used communication protocols in embedded systems. But how does it actually work?

In this video, you’ll learn how SPI transfers data between a master and slave, how multiple SPI devices can share the same bus, why some SPI devices don’t have MISO, and how CPOL and CPHA determine the 4 different SPI modes.

🔌 IN THIS VIDEO, WE COVER:

• What is SPI communication?
• MOSI, MISO, SCK & Chip Select
• Connecting multiple SPI devices
• SPI full-duplex communication
• SPI data frame sizes
• MSB First vs LSB First
• SPI timing diagrams
• CPOL & CPHA
• SPI Modes 0, 1, 2 & 3
• Arduino SPI Library
• SPI.begin()
• SPI.end()
• SPI.beginTransaction()
• SPI.transfer()
• SPI.transfer16()
• Transferring multiple bytes
• SPI.endTransaction()

By the end of this tutorial, you’ll have a much clearer understanding of how SPI communication works and how to use SPI devices with Arduino.

🔧 COMING NEXT:

We’ll put this knowledge into practice by interfacing a MAX6675 thermocouple module with Arduino.

If you’re interested in Arduino, embedded systems, microcontrollers, electronics, and communication protocols, make sure to subscribe to Electro Nerds Academy for more practical tutorials.

👍 Like the video if you found it useful, and let me know in the comments what SPI device you’d like to see interfaced with Arduino next!

#SPI #arduino #SPICommunication #arduinotutorials #embeddedsystems #electronics #microcontrollerprogramming