View source for Rockpi4/Use 4G Module on ROCK Pi 4

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    [[rockpi4 | ROCK Pi 4]] > [[rockpi4/Use 4G Module on ROCK Pi 4 | Use 4G Module on ROCK Pi 4]]

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=== Introduction ===

This guide tells how to use 4G module on ROCK Pi 4. 4G modules including SIM7600 and QUECTEL EC20 are tested.

=== Install needed packages ===

The new version (4.4.179) of ROCK Pi 4 Kernel packages are located at Radxa APT testing branches.

Firstly, add Radxa APT source, '''stretch-testing''' or '''bionic-testing''' according to [https://wiki.radxa.com/Rockpi4/radxa-apt Radxa APT]

Secondly, update U-Boot

* ROCK Pi 4A

    sudo apt-get install rockpi4a-rk-u-boot-latest

* ROCK Pi 4B

    sudo apt-get install rockpi4b-rk-u-boot-latest

Thirdly, update Kernel

    sudo apt-get install -y rockchip-overlay
    sudo apt-get install -y linux-headers-4.4.179-11-rockchip-g7ebe2c58142e 
    sudo apt-get install -y linux-image-4.4.179-11-rockchip-g7ebe2c58142e 
    sudo apt-get install -y linux-firmware-image-4.4.179-11-rockchip-g7ebe2c58142e

Finally, reboot the machine.

=== Test ===

After pluging the 4G Module, some Kernel log would be shown like this.

    root@rockpi:~# dmesg -c
    [   30.578257] usb 2-1: new high-speed USB device number 2 using ehci-platform
    [   30.702800] usb 2-1: New USB device found, idVendor=2c7c, idProduct=0125
    [   30.702844] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    [   30.702870] usb 2-1: Product: Android
    [   30.702894] usb 2-1: Manufacturer: Android
    [   30.736435] usbcore: registered new interface driver cdc_wdm
    [   30.741322] qmi_wwan 2-1:1.4: cdc-wdm0: USB WDM device
    [   30.742860] qmi_wwan 2-1:1.4 wwan0: register 'qmi_wwan' at usb-fe3c0000.usb-1, WWAN/QMI device, ce:88:21:9d:67:76
    [   30.743011] usbcore: registered new interface driver qmi_wwan
    [   30.748004] usbcore: registered new interface driver usbserial
    [   30.748295] usbcore: registered new interface driver usbserial_generic
    [   30.748413] usbserial: USB Serial support registered for generic
    [   30.754861] usbcore: registered new interface driver option
    [   30.754954] usbserial: USB Serial support registered for GSM modem (1-port)
    [   30.755801] option 2-1:1.0: GSM modem (1-port) converter detected
    [   30.757208] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB0
    [   30.757492] option 2-1:1.1: GSM modem (1-port) converter detected
    [   30.757817] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB1
    [   30.757994] option 2-1:1.2: GSM modem (1-port) converter detected
    [   30.761613] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB2
    [   30.761851] option 2-1:1.3: GSM modem (1-port) converter detected
    [   30.763861] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB3

Also, the device '''/dev/cdc-wdm0''' is created with network interface name '''wwan0'''.

Test commands:

    echo Y > /sys/class/net/wwan0/qmi/raw_ip
    
    ip link set dev wwan0 up
    
    qmicli --device=/dev/cdc-wdm0 --device-open-proxy --wds-start-network="ip-type=4,apn=data.tre.se" --client-no-release-cid
    
    udhcpc -q -f -n -i wwan0

Use '''speedtest''' tool

    root@rockpi:~# speedtest
    Retrieving speedtest.net configuration...
    Testing from China Unicom Guangdong (112.97.57.63)...
    Retrieving speedtest.net server list...
    Selecting best server based on ping...
    Hosted by ShenZhen Unicom (ShenZhen) [0.00 km]: 52.334 ms
    Testing download speed................................................................................
    Download: 49.50 Mbit/s
    Testing upload speed....................................................................................................
    Upload: 41.49 Mbit/s

=== Troubleshooting ===

* If you have a issue, start a new post on the forum. https://forum.radxa.com/