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README.md

Quectel EG25-G GSM Modem

Kernel Changes

This package requires the Spiri Mu kernel and modifications to the following files:

drivers/usb/serial/option.c
drivers/usb/serial/usb_wwan.c
drivers/net/usb/qmi_wwan.c
drivers/net/usb/Makefile

It also requires these new files:

drivers/net/usb/GobiUSBNet.c
drivers/net/usb/QMI.c
drivers/net/usb/QMI.h
drivers/net/usb/QMIDevice.c
drivers/net/usb/QMIDevice.h
drivers/net/usb/Structs.h

All these modifications and additions are part of the Spiri Mu kernel. The files are represented in https://git.spirirobotics.com/Spiri/mu_kernel_sources as symlinks from this repository.

Installation

Clone the repository:

cd ~/git
git clone https://git.spirirobotics.com/Spiri/mu_packages.git

Create a udhcpc symbolic link:

cd /bin
sudo ln -s busybox udhcpc

Create udhcpc directories, copy in the script, and give it execution permission:

sudo mkdir -p /usr/share/udhcpc
sudo mkdir -p /etc/udhcpc/
sudo cp ~/git/mu_packages/eg25-g/default.script /usr/share/udhcpc
sudo cp ~/git/mu_packages/eg25-g/default.script /etc/udhcpc
sudo chmod +x /usr/share/default.script
sudo chmod +x /etc/udhcpc/default.script

Build the application:

cd ~/git/mu_packages/eg25-g/quectel-CM
make

Running

The following command launches the package, with [apn-name] being substituted with the APN of the wireless provider. For BICS, the APN is bicsapn. To run this in the background, add & to the end of the command.

sudo ./git/mu_packages/eg25-g/quectel-CM/quectel -s [apn-name]

Troubleshooting

If the modem is correctly connected to the system, the following command will show the GSM modem attaching to ttyUSB0, ttyUSB1, ttyUSB2, and ttyUSB3:

dmesg | grep GSM

If the modem has successfully connected to a tower and is being served an IP address, then the following command will show an IP address being served:

ifconfig eth1