SIM820X RNDIS Dail-up

Method 1: Python Dail-up

• Check whether SIM820X and Raspberry Pi are connected well by the following command:

lsusb
ls /dev

• After connecting the device, copy the following commands to the Terminal:

wget https://www.waveshare.com/w/upload/1/1e/SIM820X_RNDIS.zip
sudo apt-get install python3-pip
sudo pip3 install pyserial
sudo apt-get install unzip
unzip SIM820X_RNDIS.zip
sudo chmod 777 SIM820X_RNDIS.py
sudo python3 SIM820X_RNDIS.py

Method 2: AT Command Dail-up

• Open that port via minicom:

ls /dev/ttyUSB*
sudo apt-get install minicom
sudo minicom -D /dev/ttyUSB2

• Send the following command via minicom, and wait for the module to restart.

at+cusbcfg=usbid,1e0e,9011

Test Networking

• After dialing, the Raspberry Pi can see that usb0 has obtained the ip through the following command:

ifconfig

• Test usb0 networking status:

 ping -I usb0 www.baidu.com

• If failed to obtain IP or to connect successfully, you can use the following command to obtain IP and connect:

sudo dhclient -v usb0
sudo apt-get install udhcpc
sudo udhcpc -i usb0
sudo route add -net 0.0.0.0 usb0

• Some systems may not be able to obtain the usb0 network card, please use the following command to obtain the next usb0 network card:

sudo ifconfig usb0 up

• If you need to switch to the Windows system, or restore the default settings of the module, you can send the following command to restore through the serial port:

at+cusbcfg=usbid,1e0e,9001

Config DNS (Optional)

• If you can ping the IP, but ping the URL, it is a DNS server problem, you can configure it according to the following steps:

sudo nano /etc/dhcpcd.conf

Add the national DNS address at the top of the text:

static domain_name_servers=8.8.8.8 114.114.114.114

• After restarting the Raspberry Pi, you can see that the DNS setting is successful through the following command.

sudo nano /etc/resolv.conf

• Save the file, exit, and ping test again.

Optional Network Card

If you are connected to WIFI, ETH, and 5G at the same time, if you want to use one of them to access the Internet first, for example, usb0 has priority over the eth0 network card to access the Internet, you can configure it according to the following steps:

• Edit the network configuration file dhcpcd.conf:

sudo nano /etc/dhcpcd.conf

• Add the following statement at the end:

interface usb0
metric 200
interface eth0
metric 300