How to Check and Install Drivers

Installing the correct driver is an important step before connecting your Longer laser engraver to your computer. If the required driver is missing or installed incorrectly, software such as LightBurn, LaserGRBL, or LaserBurn may not detect the machine.

This guide explains how to check whether the CH340 driver is installed and how to install it on Windows and macOS. You'll also learn how to verify that the driver is working correctly after installation.

1. Check the CH340 Driver

• If your computer cannot detect the laser engraver, the CH340 driver may be missing or installed incorrectly.
  
• For macOS 10.15 or later, the CH340 driver does not need to be installed.
• Download the following driver installation package: https://drive.google.com/drive/folders/1Sc-TKuez-mz--38Vp6DeL-pGmQcQdHW4.

Video Tutorial:

• How to install CH340 driver of LightBurn for MacOS Sequoia system: https://www.youtube.com/watch?v=JX-XsjLFei0
• How to install CH340 driver of LightBurn for MacOS system: https://www.youtube.com/watch?v=FBd1uEA9QUw

After installation, please check the COM port.

2. For Windows

(1) Connect the machine to your computer using the USB cable provided with the product.

(2) Download and install the CH340 driver. During the installation process, a computer restart may be required.

(3) Follow the installation instructions to ensure the driver is installed successfully.

• If any error messages appear during installation, contact Longer technical support at support@longer.net.

(4) Check if the driver was installed successfully in Device Manager:

• Right-click on the desktop and select “Manage.”
• Choose “Device Manager,” click on Ports (COM & LPT), and look for a COM port named CH340. If it appears, it means your device has been successfully recognized by the computer.

3. For macOS

(1) Connect the machine to your computer using the USB cable provided.

(2) Download and install the CH340 driver. A system restart may be required during installation.

(3) Follow the installation instructions to ensure the driver is installed successfully. If any error messages appear during installation, contact Longer technical support.

(4) Restart your computer, then go to System Preferences → Security & Privacy → General → Allow.

(5) Allow the CH340 driver to load. You may need to restart your computer again during this process. Follow the on-screen instructions.

(6) Reconnect the device; at this point, LaserBurn, LightBurn, or LaserGRBL should be able to detect your machine.

If the “Allow” button does not work, continue reading for troubleshooting solutions:

(1) Open the Terminal using the following path: Go → Utilities → Terminal.

(2) Copy and paste the following command into the Terminal:

• sudo kextload /Library/Extensions/usbserial.kext/

(3) Press Enter (if prompted for a password, enter your computer user password and press Enter again).

(4) Once the command executes successfully, the Terminal will display a confirmation message like the one below.

Conclusion

Installing the correct CH340 driver helps your computer communicate with your Longer laser engraver. After installation, verify that the driver is recognized before connecting your machine in LightBurn, LaserGRBL, or LaserBurn.

If your computer still cannot detect the engraver, check that the USB cable is connected properly and confirm that the driver was installed successfully. For macOS, make sure the required security permissions have been enabled if prompted.

Using the correct driver and following the recommended installation steps can help prevent connection issues and ensure reliable communication between your computer and the laser engraver.