USART, SPI, I2C, and Communication Protocols

In this chapter, we look at using serial communication protocols. In the realm of embedded systems and microcontroller applications, the ability to communicate effectively with external devices is fundamental. Serial communication is the lifeblood of embedded systems, allowing microcontrollers to interact with many external devices and peripherals. The most ubiquitous of these are USART, SPI, and I2C, which I will be explaining in this chapter. We will embark on a journey to demystify these protocols, breaking down their functionalities, configurations, and applications. The applications we cover using sensors, GPS, GSM, and a host of other things once we have learned how to use these protocols will give you hands-on experience in using these devices in your applications. So grab a bottle of water and sit down. This will be a long one. By the end of this chapter, you will get a solid grasp of serial communications setting the stage for exciting projects and innovations in your embedded systems journey. Let’s get started!