87 lines
2.7 KiB
Markdown
87 lines
2.7 KiB
Markdown
# Quectel EG25-G GSM Modem
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## Quectel Setup
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The Quectel should be conencted to a ConnectTech's Elroy board.
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The Quectel module requires to connect the antenna on the MAIN and GNSS sockets.
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Make sure to use a SIM card with full access to the mobile network.
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## Installation
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Clone the repository:
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```
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mkdir ~/git/ && cd ~/git/
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git clone https://git.spirirobotics.com/dchvs/eg25-g.git
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cd eg25-g/
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```
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Create udhcpc directories, copy in the script, and give it execution permission:
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```
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sudo mkdir -p /usr/share/udhcpc
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sudo mkdir -p /etc/udhcpc/
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sudo cp quectel-CM/default.script /usr/share/udhcpc/
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sudo cp quectel-CM/default.script /etc/udhcpc/
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sudo chmod +x /usr/share/default.script
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sudo chmod +x /etc/udhcpc/default.script
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```
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Create a udhcpc symbolic link:
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```
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sudo ln -s /bin/busybox /bin/udhcpc
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```
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Build the application:
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```
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cd quectel-CM/quectel-CM
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make
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```
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## Running
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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.
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```
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sudo ~/git/eg25-g/quectel-CM/quectel-CM -s [apn-name] &
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```
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## Troubleshooting
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If the modem is correctly connected to the system, the following command will show the GSM modem attaching to ttyUSB0, ttyUSB1, ttyUSB2, and ttyUSB3:
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```
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dmesg | grep GSM
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```
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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:
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```
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ifconfig eth1
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ping -I eth1 www.google.com
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```
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## Appends
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#### Kernel Changes
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The Driver for the EG25-G Quectel module consists has the following structure on the Kernel space side, for interfacing it and adding its Network packets transmisions on Kernel.
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```bash
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.
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├── kernel
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└── kernel-4.9-spiri
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└── drivers
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└── net
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└── usb
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├── GobiUSBNet.c
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├── Kconfig
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├── Makefile
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├── QMI.c
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├── QMIDevice.c
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├── QMIDevice.h
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├── QMI.h
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└── Structs.h
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```
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In order to add the Driver to the Kernel, the following reference Kernel files are patched:
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* drivers/usb/serial/option.c
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* drivers/usb/serial/usb_wwan.c
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* drivers/net/usb/qmi_wwan.c
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#### Documentation
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* <a href="https://nextcloud.spirirobotics.com/f/3971">Cellular modem hardware design</a>
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* <a href="https://nextcloud.spirirobotics.com/f/3970">Cellular modem PPP</a>
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* <a href="https://nextcloud.spirirobotics.com/f/3968">Cellular modem AT commands</a>
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* <a href="https://nextcloud.spirirobotics.com/f/3969">Cellular modem GNSS AT commands</a>
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