How to go to Internet through GPRS setup

Overview

This article explains how to set up the modem available on some IGEP expansion boards using pppd.

Prerequisites and tested hardware

Software:

• The IGEP Firmware Yocto (at least version 1.2.1-2) in a SD-card or flash.

Hardware:

• Processor: IGEP COM MODULE
• Expansion: IGEP BERLIN
• Accessories: GPRS antenna and SIM card.

Following explanation was tested with this hardware but should work with other hardware that comes with a GPRS modem (like the IGEPv2 EXPANSION)

Configuration example using Movistar provider (Spain)

/etc/ppp/chatscripts/apn.es.movistar file should look like this:

AT+CGDCONT=1,"IP","movistar.es"

/etc/ppp/chatscripts/pin.CODE file should look like this:

AT+CPIN=<your pin number>

/etc/ppp/chatscripts/pin.NONE file should look like this:

AT

/etc/ppp/chatscripts/movistar file should look like this:

ABORT 'BUSY'
ABORT 'NO CARRIER'
ABORT 'VOICE'
ABORT 'NO DIALTONE'
ABORT 'NO DIAL TONE'
ABORT 'NO ANSWER'
ABORT 'DELAYED'
REPORT CONNECT
TIMEOUT 6
 'ATQ0'
'OK-AT-OK' 'ATZ'
TIMEOUT 3
'OK' @/etc/ppp/chatscripts/pin
'OK\d-AT-OK' 'ATI'
'OK' 'ATZ'
'OK' 'AT S7=45 S0=0 L1 V1 X4 &c1 E1 Q0'
'OK' 'AT+IFC=0,0'
'OK' 'ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0'
'OK-AT-OK' @/etc/ppp/chatscripts/apn
'OK' 'ATD*99***1#'
TIMEOUT 30
CONNECT '

/etc/ppp/pap-secrets file should look like this:

# Secrets for authentication using PAP
# client	server	secret			IP addresses
movistar	*	movistar		*

/etc/ppp/peers/movistar file should look like this:

noauth
hide-password
connect "/usr/sbin/chat -v -f /etc/ppp/chatscripts/movistar"
/dev/ttyO1
115200
nocrtscts
defaultroute
noipdefault
user movistar
usepeerdns
nodeflate
novj
noccp
persist

/etc/ppp/ppp_on_boot file should look like this:

#!/bin/sh
# Start modem for IGEP BERLIN (BASE0010)
echo 0 > /sys/class/gpio/gpio145/value
echo 1 > /sys/class/gpio/gpio163/value
sleep 1
echo 0 > /sys/class/gpio/gpio163/value
# Call ppp provider
pppd call movistar

Troubleshooting

Debug information can found in

tail -f /var/log/messages