Send SMS using USB dongle or smartphone

sms-from-bash.sh

#!/bin/bash
# sms-from-bash.sh
#   Description: Send SMS using USB dongle or smartphone
#   Author: FraFra (Francesco Frassinelli - frafra.eu)
#   License: GPLv3

MODEM=/dev/ttyACM0
T=3

if [ ! -w $MODEM ]
then
    echo "$MODEM not writable"
    echo -n "You could add \""$(whoami)"\" to group \"dialout\" using:"
    echo " # gpasswd -a $(whoami) dialout"
    exit 1
fi

cat $MODEM &
pid=$!

function send {
    chat TIMEOUT $T "" "$1" "$2" > $MODEM < $MODEM
}

send "ATZ" "OK"
send "AT+CMGF=1" "OK"
send "AT+CMGS=\"$1\"" "OK"
send "$2" "OK"
send "^Z" "\n"

echo
kill $!