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Configuring mobile connectivity

Setting up & running Sakis3G​

  1. Update and upgrade:

    sudo apt-get update & sudo apt-get upgrade

  2. Installing dependencies and- Sakis3g client:

    sudo apt-get install ppp
    wget "http://raspberry-at-home.com/files/sakis3g.tar.gz"
    sudo mkdir /usr/bin/modem3g
    sudo chmod +x /usr/bin/modem3g
    sudo cp sakis3g.tar.gz /usr/bin/modem3g
    cd /usr/bin/modem3g

  3. Run the client interactively:

    sudo /usr/bin/modem3g/sakis3g connect --interactive

  4. Get default settings for your modem:

    lsusb

  5. Paste default settings in a file:

    sudo nano /etc/sakis3g.conf

    Config file example:

    USBDRIVER="option"
    USBINTERFACE="0"
    APN="internet"
    MODEM="12d1:155e"

Running as service script:​

  1. Make two service files:
sudo nano /etc/systemd/system/modem-connection.service
sudo nano /etc/systemd/system/ChargePi.service
  1. Paste into modem-connection.service file:
    [Unit]
    Description=Modem connection service

    [Service]
    Type=simple 
    ExecStart=/usr/bin/modem3g/sakis3g --sudo connect 
    Restart=on-failure 
    RestartSec=5  
    KillMode=process

    [Install]
    WantedBy=multi-user.target
  1. Paste into ChargePi.service file:
    [Unit]
    Description=ChargePi client 
    After=network.target modem-connection.service

    [Service]
    Type=simple 
    ExecStart=go build /<path_to_dir>/ChargePi-go/ && ./ChargePi-go
    Restart=on-failure
    KillSignal=SIGTERM

    [Install]
    WantedBy=multi-user.target

Go should be installed and the binary should be added to PATH variable.

Repeat next steps for both files:

  1. Give permissions and add services to systemd:
sudo chmod 640 /etc/systemd/system/modem-connection.service
systemctl status modem-connection.service
sudo systemctl daemon-reload
sudo systemctl enable modem-connection.service
sudo systemctl start modem-connection.service

References:​