#!/usr/bin/python
# -*- coding: utf-8 -*-
 
# Python script to send SMS in PDU MODE.
# It is using 7 bit default alphabet as specified by GSM 03.38, even chars as ñ or Ñ
# Check www.ideaversatil.com for comments. Script provided as is. NO WARRANTIES OF ANY KIND!!!
 
import string
from time import sleep
import serial
 
def reverseMe(s):
    return s[::-1]
 
def int2bin(n, count=24):
    # (int2bin Author: adomas) http://www.sourcesnippets.com/python-decimal-to-binary-conversion.html
    return "".join([str((n >> y) & 1) for y in range(count-1, -1, -1)])
 
def bin2hex(b):
    return ( "%X" % int(b,2) ).zfill(2)
 
gsm7 = {'@':'0', u'£':'1', '$':'2', u'¥':'3', u'è':'4', u'é':'5', u'ù':'6', u'ì':'7', u'ò':'8', u'Ç':'9', '\n':'10', u'Ø':'11', u'ø':'12', '\r':'13', u'Å':'14', u'å':'15', u'Δ':'16', '_':'17', u'Φ':'18', u'Γ':'19', u'Λ':'20', u'Ω':'21', u'Π':'22', u'Ψ':'23', u'Σ':'24', u'Θ':'25', u'Ξ':'26', '\f':'27##10', '^':'27##20', '{':'27##40', '}':'27##41', '\\':'27##47', '[':'27##60', '~':'27##61', ']':'27##62', '|':'27##64', u'€':'27##101', u'Æ':'28', u'æ':'29', u'ß':'30', u'É':'31', ' ':'32', u'!':'33', '"':'34', '#':'35', u'¤':'36', '%':'37', '&':'38', '\'':'39', '(':'40', ')':'41', '*':'42', '+':'43', ',':'44', '-':'45', '.':'46', '/':'47', '0':'48', '1':'49', '2':'50', '3':'51', '4':'52', '5':'53', '6':'54', '7':'55', '8':'56', '9':'57', ':':'58', ';':'59', '<':'60', '=':'61', '>':'62', '?':'63', u'¡':'64', 'A':'65', 'B':'66', 'C':'67', 'D':'68', 'E':'69', 'F':'70', 'G':'71', 'H':'72', 'I':'73', 'J':'74', 'K':'75', 'L':'76', 'M':'77', 'N':'78', 'O':'79', 'P':'80', 'Q':'81', 'R':'82', 'S':'83', 'T':'84', 'U':'85', 'V':'86', 'W':'87', 'X':'88', 'Y':'89', 'Z':'90', u'Ä':'91', u'Ö':'92', u'Ñ':'93', u'Ü':'94', u'§':'95', u'¿':'96', 'a':'97', 'b':'98', 'c':'99', 'd':'100', 'e':'101', 'f':'102', 'g':'103', 'h':'104', 'i':'105', 'j':'106', 'k':'107', 'l':'108', 'm':'109', 'n':'110', 'o':'111', 'p':'112', 'q':'113', 'r':'114', 's':'115', 't':'116', 'u':'117', 'v':'118', 'w':'119', 'x':'120', 'y':'121', 'z':'122', u'ä':'123', u'ö':'124', u'ñ':'125', u'ü':'126', u'à':'127'}
rvphone = ""
i = 0
txtBin = ""
txtHex = ""
 
txt = unicode(raw_input("Text to send: "),'utf-8')
phone = raw_input("Phone number: ")
lensms = len(txt)
 
if (len(phone) % 2) > 0:
    phone = phone + "F"
 
while i < len(phone):
    rvphone += reverseMe(phone[i:i+2])
    i += 2
phone = rvphone
 
for c in reverseMe(txt):
 
    try:
         word = gsm7[c]
    except Exception, e:
        print '%s Not found, Exception: %s' % (c,e)
        word = '63' # Using ? as wildcard
    bytes = word.split('##')
 
    if len(bytes) > 1:
        txtBin += int2bin(int(bytes[1]),7)
        lensms += 1
    txtBin += int2bin(int(bytes[0]),7)
 
mlen = len(txtBin)
txt8 =  txtBin.zfill(mlen + (8 - mlen % 8))
mlen8 = len(txt8)
i = 0
 
while i < mlen8:
    txtHex = bin2hex(txt8[i:i+8]) + txtHex
    i += 8
#Composing GSM PDU
pdu = "001100"
pdu +=  ("%X" % len(phone)).zfill(2)
pdu +=  "81" + phone
pdu += "0000AA%s%s" % ( ("%X" % (lensms)).zfill(2),txtHex )
print "AT+CMGS=%s\n%s" % ((len(pdu) / 2) - 1 ,pdu.upper()) #Printing command to send sms
 
try:
    s = serial.Serial('/dev/rfcomm0', 9600, timeout=1)
    #AT commands tested successfully on Sony Ericsson, Nokia and Motorola terminals
    s.write('ATZ\r') # Back to default phone settings
    sleep(1)
    s.write('ATE=0\r') #Turn Off Local Echo
    sleep(1)
    s.write('AT+CPMS="ME","ME"\r')#Using Phone's Memory as workspace
    sleep(1)
    s.write('AT+CMGF=0\r') #Enabling PDU Mode. AT+CMGF=1 for Text Mode
    print "Sending..."
    sleep(1)
    s.write("AT+CMGW=%s\r" % ((len(pdu) / 2) - 1 )) #Writing SMS to phone instead of actually sending SMS (debug Mode),
                                                    #change this command to AT+CMGS when  you are ready to send SMS
    sleep(1)
    s.write(pdu.upper())
    s.write(chr(26)) # CTRL+Z
    sleep(1)
    print s.read(1024) #Reading phone answers
 
    s.close()
 
except Exception, e:
    print "Unable to open /dev/rfcomm0, Exception: %s" % e