ADEEPT PiCar-Pro Manual page 8

The following contents will briefly explain the main structure ports of the
Raspberry Pi 4 motherboard:
(1) GPIO 40-PIN pin:
The General Purpose Input Output (GPIO) is designed as a slot with two rows of
pins on the Raspberry Pi motherboard. GPIO can be used to connect various
peripheral electronic devices and sensors to control or monitor these devices through
input/output level signals. For example, you can use GPIO to control the speed of a
DC motor, or read the measured distance of an ultrasonic sensor. These functional
characteristics of GPIO make the Raspberry Pi different from ordinary computer
motherboards because it gives developers the freedom to operate manually. We will
further introduce GPIO in the subsequent chapters and use them extensively.
(2) Gigabit Ethernet port:
The Ethernet interface allows the Raspberry Pi to connect to the computer
network in a wired manner, which allows us to easily access the Internet or log in to
the Raspberry Pi remotely. The Raspberry Pi's Ethernet interface is implemented
using a USB bus, and data is transferred through the USB bus. Most models of
Raspberry Pi provide an Ethernet interface
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