Archived:How to send AT commands and Dial with PySymbian and Bluetooth

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Created: robertnk (06 Nov 2008)
Last edited: hamishwillee (26 Jun 2013)

This article provides a Python desktop code sample showing how to access a mobile device from a PC using Python and Bluetooth (PyBluez) and Dial a number using AT commands. Additional AT commands are used to get the device name and capabilities.

The example should work from a laptop or desktop with a Bluetooth dongle. Close PC suite first and turn off the phone Bluetooth between each try or the DUN port may be busy.

To Dial a number on a remote device uncomment these two lines in the code:

  #s.send('ATD +1415xxxxxxx;\r'),
  #print s.recv(1024),

and replace +1415xxxxxxx with a valid phone number.

# ATsend.py
# Turn the phone bluetooth off and on each time you
# send the At commands to free up the DUN port
# Requires Pybluez from Google
# http://code.google.com/p/pybluez/
# PyBluez works on GNU/Linux and Windows XP (Microsoft and Widcomm Bluetooth stacks)
# Send At commands to mobile device via DUN
# Some code to show how to dial a number with
# AT commands also shown below
# November 5, 2008
import sys
import bluetooth #Pybluez http://code.google.com/p/pybluez/
deviceName = []
deviceAddress = None
foundDevices = bluetooth.discover_devices()
count = 0
while count == 0:
print ""
print ""
for bdaddr in foundDevices:
deviceName.append(bluetooth.lookup_name( bdaddr ))
deviceAddress = bdaddr
print "%2d  %-16s Address: %s" % (count +1, deviceName[count], deviceAddress)
count += 1
choice = raw_input("Choose Device or 0 to repeat scan")
# Repeat scan to get more device names
if (choice.isdigit() and int(choice) <= len(foundDevices)):
count = int(choice)
if choice > "0":
print "\n-- Select device, 0 to repeat scan or q to quit --"
print ""
selected = deviceName[count -1]
deviceAddress = foundDevices[count -1]
if deviceAddress is not None:
print ""
print "Could not find a Bluetooth device"
elif choice == 0:
count = choice # Repeat the while loop and device scan again
elif choice == "q" or choice == "Q":
services = bluetooth.find_service(address=deviceAddress)
devicename = bluetooth.lookup_name(deviceAddress, timeout=10)
showProfiles = None
if len(services) > 0:
print "Found %d services on %s\n" % (len(services), deviceAddress)
print "No device found at address: %s" % deviceAddress
print "Did you turn on bluetooth?"
print "Did you accept/authorize the connection?"
dunPort = 0 # Not found yet
# Get Service Details
# global showProfiles
showProfiles = raw_input("Show Bluetooth Profiles supported? y|n")
for svc in services:
# Look for DUN port
if svc["name"] == "Dial-Up Networking":
dunPort = svc["port"]
if showProfiles == "y":
print "BT Profile: %s"  % svc["name"]
print " Host:  %s" % svc["host"]
print " Description: %s" % svc["description"]
print " Provided By: %s" % svc["provider"]
print " Protocol:  %s" % svc["protocol"]
print " channel/PSM: %s" % svc["port"]
print " svc classes: %s "% svc["service-classes"]
print " profiles:  %s "% svc["profiles"]
print " service id:  %s "% svc["service-id"]
if dunPort != 0:
print "Found Dial-Up Networking port = %d\n" % (dunPort)
s = bluetooth.BluetoothSocket(bluetooth.RFCOMM)
conn = s.connect((deviceAddress, dunPort))
# A semicolon ";" at the of the number dialed
# is necessary to make a voice call
# with out the ";" this command will try to
# make a data call
# Example to Dial a number using AT command
#s.send('ATD +1650xxxxxxx;\r'),
#print s.recv(1024),
# This next section has to expect the correct number of returns
# The first command "ATE1" gets a single "OK" response with a carrage return
# The next commands expects 2 lines returned.
# Each line return ends with \r
# The correct send/expect sequence must be followedd or you will get
# a hang or no response.
print s.recv(1024),
print s.recv(1024),
print s.recv(1024),
print s.recv(1024),
print s.recv(1024),
print s.recv(1024),
print s.recv(1024),
print s.recv(1024),
print s.recv(1024),
else :
print "Could not find Dial Up Networking port."
print "Or DUN port is busy."
print "Switch the target's Bluetooth off then on and retry"
This page was last modified on 26 June 2013, at 05:39.
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