Industrial tablet Ubuntu system installed 4G module

Quectel EM05-G is a 4G module that can usually be managed and configured through NetworkManager. The following are the basic steps to install and configure the Quectel EM05-G 4G module under Ubuntu 22.04 system:

Insert 4G module： Plug the Quectel EM05-G module into your computer's USB port.

Check if the module is recognized： Open the terminal and run the following command to check whether the system recognizes the 4G module:

Lsusb

You should be able to see devices similar to Quectel in the list.

Install usb-modeswitch (if needed)： Sometimes, it is necessary to use usb-modeswitch to switch the working mode of the 4G module. Run the following command in the terminal to install usb-modeswitch:

sudo apt-get install usb-modeswitch

Configure NetworkManager： Use NetworkManager to configure the 4G connection. Run the following command in the terminal to open NetworkManager settings:

nm-connection-editor

• In the connection editor, click the "+" button to add a new Mobile Broadband connection.
• Select "Connect automatically" and "Available to all users".
• Select your 4G module in the "Device" option.
• Click "Save" and close the editor.
• 重新启动NetworkManager： Run the following command in the terminal to restart NetworkManager：

sudo systemctl restart NetworkManager

Connect to 4G network： You should now be able to see the new 4G connection option in the system tray or network settings. Click Connect to establish a 4G connection.

Verify connection： Open a terminal and run the following command to check the network connection status:

nmcli connection show

You should be able to see the connected 4G network.

Please note, make sure your carrier supports the 4G module you are using and that you have the correct APN settings. You may also need to enter a PIN if required. The above steps may vary depending on your hardware, network provider, and driver version, so you may need to fine-tune it on a case-by-case basis.。