Integrating wireless technologies into 3D printer control opens new horizons for additive manufacturing, enabling remote control of the printing process. Installing the MKS WiFi plugin based on the popular OctoPrint system is one of the most effective ways to transform a conventional printer into a smart device accessible from anywhere. This solution is especially relevant for owners of equipment with MKS boards who are looking to modernize their fleet without purchasing expensive industrial software.
The installation process requires careful attention, as it affects both the software of the single-board computer (for example, Raspberry Pi) and the configuration of the printer itself. Connection stability This plays a key role, as a connection failure during printing can lead to product defects or, in the worst case, a crash. Understanding the architecture of the interaction between the host, plugin, and printer firmware will help avoid common beginner mistakes.
In this article, we'll cover every step in detail: from preparing the environment to fine-tuning G-code transmission parameters. You'll learn how to properly compile firmware, which ports to use for communication, and how to secure your network from unauthorized access. MKS WiFi Plugin — is a powerful tool that, when properly configured, becomes an indispensable assistant in the workshop.
Preparation of equipment and software
Before proceeding with the installation, you must ensure that all required components are available. A single-board computer (SBC) is most often used as the basis for the control system. Raspberry Pi 3, 4, or Zero 2 W models, although other ARM or x86 devices that support Linux will also work. This computer must have an operating system installed, usually Raspberry Pi OS (formerly Raspbian), and deployed a server OctoPrint.
A crucial component is the WiFi module itself. For MKS boards, this can be an integrated module or an external USB adapter compatible with the Linux kernel. If you're using specialized control boards, such as MKS Robin or MKS Gen, make sure they are flashed with the appropriate version of Marlin or Klipper that supports network communication. Checking the compatibility of the printer firmware and plugin versions is a critical step that cannot be ignored.
⚠️ Warning: Using non-genuine or cheaply made WiFi modules may result in unstable driver operation in Linux. We recommend using certified adapters with Realtek or MediaTek chips, which have open kernel support.
You'll also need a stable local network. For the initial setup, it's best to connect the Raspberry Pi to the router via an Ethernet cable to avoid wireless connection issues while installing packages. After the basic configuration, you can switch to WiFi. Make sure you have access to the device's terminal (via SSH or directly) and root privileges (sudo).
Installing the OctoPrint base environment
The foundation of the entire system is a properly functioning OctoPrint. If you haven't installed it yet, you should do so first. The installation process is Raspberry Pi significantly simplified by using ready-made images or a script octoprintFor users who prefer a clean installation, you will need to create a Python virtual environment, which will isolate the plugin's dependencies from system libraries.
The first step is to update the system's package database. In the terminal, run the command sudo apt update && sudo apt upgrade -yThis ensures that all system components, including compilers and libraries, are up to date. Next, you need to install Python dependencies, such as python3-pip, python3-dev And libyaml-devWithout them, installing plugins may result in a compilation error.
OctoPrint itself is installed via pip. The command looks like this:
pip install octoprintAfter installation, you need to start the server and check its availability via the web interface at the address http://localhost:5000At this stage, it's important to configure the user and basic printer settings in the interface. Only after OctoPrint is running stably and can control the printer via USB should you proceed with installing the MKS WiFi Plugin.
☑️ Check before installing the plugin
MKS WiFi Plugin installation process
The plugin is installed directly through the OctoPrint web interface, making the process accessible even to users with minimal Linux experience. Go to the section Settings (Settings), then select the tab Plugin Manager (Plugin Manager). In the list of available add-ons, find MKS WiFi PluginIf the plugin is not in the standard registry, you can install it manually using the GitHub archive URL.
To install manually, copy the repository link or ZIP archive of the latest plugin version. In the plugin manager, click the "Get More" button and paste the link into the "URL" field. The system will automatically download the package, verify its integrity, and check dependencies. The installation process may take a few minutes, during which time the OctoPrint server will restart to activate the changes.
After rebooting, a new icon or tab corresponding to MKS WiFi should appear in the top menu. If this doesn't happen, check the system logs. Issues often arise due to incompatible Python versions or insufficient serial port access rights. In this case, you may need to add a user. pi (or your user) to the group dialout team sudo usermod -a -G dialout pi.
It's important to note that the MKS WiFi Plugin isn't a one-size-fits-all solution for all boards. It's optimized for specific controllers. Make sure your board supports the file and command transfer protocol used by the plugin. In some cases, modifications to the configuration file may be required. config.yaml manually to specify the correct path to the device or port.
Setting up Marlin firmware for the WiFi module
The printer's software must be ready to receive commands over the network. For this purpose, the firmware Marlin The corresponding functions must be activated. Open the configuration file. Configuration.h in the firmware source code. Find the section responsible for network connections and uncomment the line #define MKS_WIFI or similar, depending on the version of Marlin.
Next, you need to configure the network settings. In the file Configuration_adv.h or in the printer menu (if supported), set a static IP address, subnet mask, and gateway, or enable DHCP mode. For stable operation of the 3D printer, it is highly recommended to use static IP addressso that the path to the device does not change after rebooting the router.
| Parameter | Description | Example of meaning |
|---|---|---|
| WIFI_SSID | Your wireless network name | "Home_Network" |
| WIFI_PWD | WiFi network password | "StrongPassword123" |
| IP_ADDR | Static IP address of the printer | "192.168.1.150" |
| PORT | Port for Telnet/HTTP connections | 23 or 80 |
After making changes, the firmware must be compiled and uploaded to the printer controller. Make sure the correct flags for your board are selected during compilation. An incorrectly selected board model may cause the printer to stop responding to commands or the WiFi module to fail to start. After updating the firmware, the printer should automatically connect to the network, as indicated by the indicator on the module or the status on the screen.
⚠️ Important: WiFi parameters (SSID and password) must not contain special characters that may be misinterpreted by the C++ compiler. Use only Latin letters and numbers.
Configuring connections and ports
The link between OctoPrint and the printer is the correct port and connection speed (baudrate). In the MKS WiFi plugin settings in the OctoPrint interface, you must specify the IP address you configured in the firmware, or select USB emulation connection mode if the module operates in that mode. For network connections, the connection type is selected as Socket or Serial over TCP.
The data transfer rate must match the one specified in the printer firmware. The standard values are 115200 or 250000 baud. Mismatches between these parameters will result in garbage in the logs and the inability to control the printer. If you are using a direct USB connection to the Raspberry Pi, the port is usually detected as /dev/ttyUSB0 or /dev/ttyACM0.
To test the connection, use OctoPrint's built-in terminal. Send the command M115If you receive firmware version information in response, the connection is established correctly. If there is no response, check the firewall on your Raspberry Pi. Sometimes it's the system firewall. ufw may block outgoing or incoming connections on non-standard ports.
Diagnostics and troubleshooting
During operation, situations may arise where the connection is interrupted or the printer becomes unavailable. The first step in diagnostics is always log analysis. In OctoPrint, go to Logs and study the file octoprint.logLook for lines with the words "Error," "Timeout," or "Connection lost." These entries will indicate when the connection was lost and the possible cause.
A common issue is overheating of the WiFi module or unstable power supply. If the MKS module is overheating, provide additional cooling. It's also worth checking the Raspberry Pi power supply—insufficient amperage can cause the USB ports to shut down under peak loads, such as when all the printer axes are moving simultaneously.
What to do if the printer freezes when sending G-code?
If the printer stops responding when sending complex commands, try reducing the baudrate in the serial port settings. Increasing the clipboard size in the Marlin firmware (SERIAL_BUFFER_SIZE parameter) may also help. In rare cases, reflashing the WiFi module by updating its internal firmware may be necessary.
If the problem is related to updating the firmware via the network, make sure that the firmware file (.bin) is placed in the correct folder on the SD card or in OctoPrint's virtual storage. Some versions of the MKS WiFi Plugin require the file to have a specific name or be located in the root of the SD card. Check the documentation for your specific plugin version.
Security and performance optimization
Connecting a 3D printer to a network requires basic security precautions. By default, many devices have weak security or default passwords. Be sure to change the password for accessing the OctoPrint interface and, if possible, configure access to the WiFi module itself. Do not leave the printer on an open network without security, especially if it has access to the file system.
To optimize performance, it's recommended to set up automatic connection recovery. The MKS WiFi plugin often includes this option. Auto ReconnectEnable this feature so that the printer will attempt to reconnect automatically during short-term network outages without interrupting the printing process. It's also helpful to set up notifications for print completion or errors via Telegram or email.
⚠️ Warning: Network interface configuration and security settings may change with Marlin and OctoPrint firmware updates. Always check the official developer repositories before making critical changes to your network settings.
Update your software regularly. MKS developers and the OctoPrint community constantly release patches that fix vulnerabilities and improve connection stability. Follow official releases to ensure your management system remains reliable and secure.
Frequently Asked Questions (FAQ)
Can I use MKS WiFi Plugin with Klipper firmware?
Yes, this is possible, but it requires additional configuration. Klipper uses a different communication mechanism (Moonraker), so the direct MKS plugin may not work out of the box. A Moonraker-OctoPrint combo or direct access to Klipper via its Fluidd/Mainsail web interface is often used, which is a more modern solution.
Why doesn't OctoPrint see the printer after installing the plugin?
Most likely, there are driver conflicts or the port is busy. Check if another service (such as Cura Connect or the MKS service itself) is running and hogging the USB port. Also, make sure the user has read/write permissions to the port (/dev/ttyUSB0).
What is the maximum print speed supported over WiFi?
Print speed is limited not so much by WiFi as by the G-code processing speed of the printer controller and the clipboard. Using MKS WiFi and a stable signal, you can print at any speed supported by your printer. However, for very complex models with many fine movements, printing from an SD card is preferable.
Do I need to recompile the firmware every time I change WiFi settings?
Not always. Many modern MKS boards allow you to change the SSID and password through the printer menu or by sending G-codes that are stored in EEPROM. Recompilation is only required when changing logic parameters, such as changing the port, baudrate, or enabling/disabling functions in Configuration.h.