UART Connection

USB is the most common way of communication between our Raspberry Pi and the Mainboard of the 3D Printer but there is another possibility. It is possible to connect the Mainboard of the 3D Printer with the Raspberry directly via UART using a couple of wires. This will allow us to integrate the Raspberry inside the printer and have the connection cable running inside the printer instead of using the external USB Connection.

Prerequisites

• 3 Wires to connect the Mainboard to the Raspberry GPIO pins
• Connectors

Preparation of the Raspberry Pi

To allow the Raspberry Pi to communicate with the Mainboard we need to enable the UART communication in