Dorony

Quectel EC25 is a series of LTE category 4 module optimized specially for M2M and IoT applications. Adopting the 3GPP Rel. 11 LTE technology, it delivers 150Mbit/s downlink and 50Mbit/s uplink data rates. Designed in the compact and unified form factor.

As we got a mini PCIE EC25-AU module on hand, so we like to share you the below experience, and it should works for other platform like Raspberry Pi, etc.

• Download your kernel source code
• Modify few source files in the source code and config your kernel
• Compile the kernel and replace the zImage

Step 1. Download the kernel source code for TK1

sudo apt-add-repository universe
sudo apt-get update
sudo apt-get install libncurses5-dev
sudo su

It is very important that you need to run “sudo su” to run the follow commands.

cd /usr/src/
wget http://developer.download.nvidia.com/embedded/L4T/r21_Release_v4.0/source/kernel_src.tbz2
tar -xvf kernel_src.tbz2
cd kernel

 

Step 2. Modify the source files and config the kernel

As you are under the kernel folder, you need to modify:

[KERNEL]/drivers/usb/serial/option.c

Add the VID and PID

 

Add reset resume

[KERNEL]/drivers/usb/serial/usb_wwan.c

 

After the modify you need to run

make menuconfig

and select the “USB Driver for GSM and CDMA modems”

[*] Device Drivers ->

[*] USB Support ->

[*] USB Serial Converter support ->

[*] USB Driver for GSM and CDMA modems

save and exit!

 

Step 3. Compile the source code and replace the zImage

make -j4 zImage
make modules
make modules_install

Now you will see the zImage file under the [KERNEL]/arch/arm/boot/ folder.

Before you replace the zImage under /boot/ folder you better make a backup first

cp /boot/zImage /boot/zImage.bp
cp arch/arm/boot/zImage /boot/

Done! And after you reboot the system you should see that:

 

If you want to have this module, here is the link: https://www.hyper-labs.com/Modules?product_id=90