Description

The EC20-4G module is a 4G LTE communication module produced by Quectel, supporting multi-band LTE network connections, suitable for IoT, vehicle communication and other application scenarios. This module integrates rich interfaces and features to meet various data transmission requirements.

Module model used this time

• Model: EC20CEHDLG-MINIPCIE-C
• Interface Type: Mini PCIe
• LCSC Mall Number: C2916192
• LCSC Mall Purchase Link: 👉:EC20-4G Module (Mini PCIe Interface)

Downloading Corresponding Image

Use Network Disk🚀 to download the provided .img image file in the System Image/Ubuntu24/ directory.

The image used in this document is: TaishanPi-3M-RK3576_Ubuntu24-Xubuntu_AP6256-EC20.img

Select an image with ec20 in its name.

Connecting the Module

Insert SIM card:

Important Note: The SIM card must be a 4G network card and must have data service enabled, otherwise it cannot connect to the internet.

Insert the EC20-4G module into the development board's Mini PCIe interface and connect the antenna.

Flashing Image to Development Board

Reference Finished Image Flashing to flash the downloaded image to the development board.

Configuring EC20-4G Module

Note

When the EC20-4G module is powered on for the first time, we need to configure some basic settings and use WWAN dial-up to use the 4G network normally.

Switch to root user with the following command:

sudo su

Then enter the following command:

echo -e 'AT+QCFG="usbnet",1\r' > /dev/ttyUSB2

Then restart the development board:

reboot

Network Testing

Start the system, log in to the serial terminal, and check if the device starting with enx exists:

Serial terminal reference: Serial Debug Usage

ifconfig

Make sure WiFi is disconnected and only use 4G network for testing.

Use ping command to test if the network is working:

ping www.baidu.com