How to Turn a Raspberry Pi into a G-code Reader

Raspberry Pi is a versatile single-board computer with endless automation, programming, and DIY project opportunities. In the realm of 3D printing and CNC machining, Raspberry Pi can be transformed into a G-code reader, enabling users to control, monitor, and manage G-code files for their devices remotely. This article will walk you through the process of turning a Raspberry Pi into a G-code reader to enhance the overall efficiency and convenience of your 3D printing or CNC operations.
1. Required Components
Before you begin, make sure you have the following components:
- A Raspberry Pi board (preferably Raspberry Pi 3 or newer)
- A compatible SD card with a compatible OS (e.g., Raspbian)
- Ethernet cable or Wi-Fi setup for internet connectivity
- A USB cable for connecting the Raspberry Pi to the 3D printer or CNC machine
Orange Pi PC Plus
2. Install OctoPrint on Raspberry Pi
OctoPrint is an open-source, web-based 3D printer management tool that enables users to manage and monitor G-code files remotely. To install OctoPrint on Raspberry Pi, follow these steps:
a. Download the OctoPrint image from the [official website](//
b. Flash the downloaded image on to the SD card using a tool like [Etcher](//
c. After flashing the image, insert the SD card into the Raspberry Pi and boot it up.
d. Configure network settings by editing the `octopi-wpa-supplicant.txt` file in the "boot" partition to add your Wi-Fi credentials.
3. Configure OctoPrint for Your 3D Printer or CNC Machine
After installing OctoPrint on the Raspberry Pi, connect your 3D printer or CNC machine to the Raspberry Pi using the USB cable and configure OctoPrint accordingly:
a. Access the OctoPrint web interface by typing the Raspberry Pi's IP address or "//octopi.local" into your browser.
b. Follow the setup wizard to configure OctoPrint, such as adding a printer profile, specifying the bed size, and configuring the axes.
c. Test the connection between OctoPrint and the 3D printer or CNC machine by clicking the "Connect" button in the top-left corner of the OctoPrint interface.
Orange Pi PC
4. Upload G-code Files to OctoPrint
With OctoPrint set up and connected to your printer or CNC machine, you can now upload and manage G-code files:
a. Click the "Upload" button in the "Files" sidebar to browse and upload the desired G-code files.
b. Organize, sort, and manage G-code files directly through the OctoPrint interface.
c. Select the G-code file you wish to run and click the "Load and Print" or "Load" button, depending on whether you want to start printing immediately or prepare the file for later use.
Orange Pi 5B
5. Monitor and Controlthe 3D Printer or CNC Machine
OctoPrint offers comprehensive monitoring and control capabilities for your printing or machining processes:
- Monitor the progress of the print job in real-time using the built-in G-code viewer.
- Adjust temperatures, speeds, or filament settings while the 3D printer or CNC machine is in operation.
- Pause, resume, or stop active print jobs directly through the OctoPrint interface.
Transforming a Raspberry Pi into a G-code reader using OctoPrint enables powerful control, monitoring, and management capabilities for your 3D printer or CNC machine. With this setup, you can remotely manage G-code files, make real-time adjustments to print parameters, and easily monitor the progress of ongoing print jobs. The implementation of Raspberry Pi as a G-code reader not only increases operational efficiency but also unlocks more flexibility and control for users working with 3D printing or CNC machining operations.