Based on the Open3G project. This script was written to allow an embedded Linux system using Raspberry PI to connect to the Internet using a 3G modem. It can handle disconnection, can auto detect APN and optionally can use wvdial to handle the connection.
- pppd
- wvdial [optional use]
- usb_modeswitch
- chat
- stty
Obs: On debian run apt install wvdial ppp usb-modeswitch
open3gs [COMMAND] [OPTIONS]
| Command | Details |
|---|---|
| install | First step: create link to bin, logs dir, configure logrotate, detect modem, carrier... |
| connect | Connect to the auto-detected carrier |
| disconnect | Close active connection |
| reconnect | Finishes the actual connection/process and try to connect again |
| status | Display the status of the current connection |
| reconfigure | Detect the modem and APN and build the default configuration file |
| help | Display this help |
| Option | Details |
|---|---|
| -a | Always detect modem, APN, configure the modem when dialing. (use with connect) |
| -e | Experimental option. Don't use wvdial, use only pppd and basic linux tools (for connect) |
| -f | Force to use a specific config file. (Use with connect or reconfigure) |
open3gs connect -f # connect with settings created by 'install' or 'reconfigure'
open3gs connect -f /etc/open3gs/providers.d/oi.conf # connect using specific config file
open3gs connect -a # aways try to detect carrier and modem when dialing
open3gs reconfigure # config open3gs auto-detecting settings
open3gs reconfigure -f /opt/open3gs/providers.d/oi.conf # config open3gs to use specific config file
- Sample pppd:
/usr/sbin/pppd -d /dev/ttyUSB0 460800 noauth persist defaultroute noipdefault usepeerdns nodeflate refuse-pap user oi password oi connect /usr/bin/chat -v TIMEOUT 300 ABORT \BUSY\ ABORT \NO DIALTONE\ ABORT \NO CARRIER\ \\ ATZ OK AT+cfun=1 OK AT+CGDCONT=1,\IP\,\gprs.oi.com.br\ -T ATDT*99# CONNECT \\
- Connect with wvdial:
/usr/bin/wvdial -C /specta/3g/default.conf