Enterprise Internet of Things Handbook

Hardware communication protocols

Now that we have seen what a sensor, actuator, and controller are, we are going to look at how the sensor/actuator interfaces with the controller.

There are multiple protocols with which communications can happen. The most commonly used ones are:

• GPIO
• Analog/voltage reading
• UART
• SPI
• I²C

Let's get an overview of what each of these are and how they work.