Use the SIM908 on odroid U3

sim908.sh

#!/bin/bash

# Config /etc/ppp/peers/fona

(test -e /etc/ppp/peers/fona && echo "/etc/ppp/peers/fona already exists") ||
(touch /etc/ppp/peers/fona &&
echo '# Example PPPD configuration for SIM908 on Archlinux-ARM.' >> /etc/ppp/peers/fona;
echo '' >> /etc/ppp/peers/fona;
echo '# MUST CHANGE: Change the -T parameter value **** to your networks APN value.' >> /etc/ppp/peers/fona;
echo '# For example if your APN is 'internet' (without quotes), the line would look like:' >> /etc/ppp/peers/fona;
echo '# connect "/usr/sbin/chat -v -f /etc/chatscripts/gprs -T internet"' >> /etc/ppp/peers/fona;
echo '# I'm connecting via Ting's 2G cellular plan for IOT, which uses the APN "wholesale"'
echo 'connect "/usr/sbin/chat -v -f /etc/chatscripts/gprs -T wholesale"' >> /etc/ppp/peers/fona;
echo '' >> /etc/ppp/peers/fona;
echo '# The Odroid U3 UART port is part of GPIO #1, and named "ttySAC0"' >> /etc/ppp/peers/fona;
echo '/dev/ttySAC0' >> /etc/ppp/peers/fona;
echo '' >> /etc/ppp/peers/fona;
echo '#  Baud rate of the serial line. I am using 9600, but it can be increased as needed.' >> /etc/ppp/peers/fona;
echo '9600' >> /etc/ppp/peers/fona;
echo '' >> /etc/ppp/peers/fona;
echo '# Assumes that your IP address is allocated dynamically by the ISP.' >> /etc/ppp/peers/fona;
echo 'noipdefault' >> /etc/ppp/peers/fona;
echo '' >> /etc/ppp/peers/fona;
echo '# Try to get the name server addresses from the ISP.' >> /etc/ppp/peers/fona;
echo 'usepeerdns' >> /etc/ppp/peers/fona;
echo '' >> /etc/ppp/peers/fona;
echo '# Use this connection as the default route to the internet.' >> /etc/ppp/peers/fona;
echo 'defaultroute' >> /etc/ppp/peers/fona;
echo '' >> /etc/ppp/peers/fona;
echo '# Makes PPPD "dial again" when the connection is lost.' >> /etc/ppp/peers/fona;
echo 'persist' >> /etc/ppp/peers/fona;
echo '' >> /etc/ppp/peers/fona;
echo '# Do not ask the remote to authenticate.' >> /etc/ppp/peers/fona;
echo 'noauth' >> /etc/ppp/peers/fona;
echo '' >> /etc/ppp/peers/fona;
echo '# # No hardware flow control on the serial link' >> /etc/ppp/peers/fona;
echo 'nocrtscts' >> /etc/ppp/peers/fona;
echo '' >> /etc/ppp/peers/fona;
echo '# No modem control lines.' >> /etc/ppp/peers/fona;
echo 'local' >> /etc/ppp/peers/fona);

# Config /etc/chatscripts/gprs

(test -e /etc/chatscripts/gprs && echo "/etc/chatscripts.gprs already exists") ||
(mkdir /etc/chatscripts;
touch /etc/chatscripts/gprs &&
echo '#Abort the chat script on the following conditions' >> /etc/chatscripts/gprs;
echo ' ' >> /etc/chatscripts/gprs;
echo 'ABORT           BUSY' >> /etc/chatscripts/gprs;
echo 'ABORT           VOICE' >> /etc/chatscripts/gprs;
echo 'ABORT           "NO CARRIER"' >> /etc/chatscripts/gprs;
echo 'ABORT           "NO DIALTONE"' >> /etc/chatscripts/gprs;
echo 'ABORT           "NO DIAL TONE"' >> /etc/chatscripts/gprs;
echo 'ABORT           "NO ANSWER"' >> /etc/chatscripts/gprs;
echo 'ABORT           "DELAYED"' >> /etc/chatscripts/gprs;
echo 'ABORT           "ERROR"' >> /etc/chatscripts/gprs;
echo ' ' >> /etc/chatscripts/gprs;
echo '# Abort attempt to connect if the modem is not yet attached to the network.' >> /etc/chatscripts/gprs;
echo 'ABORT           "+CGATT: 0"' >> /etc/chatscripts/gprs;
echo ' ' >> /etc/chatscripts/gprs;
echo '""				AAAAAA # init the baudrate' >> /etc/chatscripts/gprs;
echo '""              AT' >> /etc/chatscripts/gprs;
echo 'TIMEOUT         12' >> /etc/chatscripts/gprs;
echo 'OK              ATH' >> /etc/chatscripts/gprs;
echo 'OK              ATE1' >> /etc/chatscripts/gprs;
echo ' ' >> /etc/chatscripts/gprs;
echo '# Use +CPIN if you need to provide the SIM card PIN example uses code 1234.' >> /etc/chatscripts/gprs;
echo '#OK             "AT+CPIN=1234"' >> /etc/chatscripts/gprs;
echo ' ' >> /etc/chatscripts/gprs;
echo '# Set the PDP context, continue on OK' >> /etc/chatscripts/gprs;
echo ' ' >> /etc/chatscripts/gprs;
echo 'OK              AT+CGDCONT=1,"IP","\T","",0,0' >> /etc/chatscripts/gprs;
echo 'OK              ATD*99#' >> /etc/chatscripts/gprs;
echo 'TIMEOUT         22' >> /etc/chatscripts/gprs;
echo 'CONNECT         ""' >> /etc/chatscripts/gprs);

# Start PPP

pon fona;