====== How to get 4g working under Linux ======

Thank you [[http://forums.whirlpool.net.au/user/268905|jhend]] from whirlpool for the python script.

Telstra 4g Device (lsusb):
    0f3d:68aa Airprime, Incorporated

Have to upgrade kernel sierra wireless modules, compile these drivers\\
[[http://mycusthelpadmin.net/SIERRAWIRELESS/_cs/AnswerDetail.aspx?sSessionID=8271670ADBE44815BFA546776724A658KBMXCSDU&aid=44|Sierra update]]\\
I'm using Linux kernel 2.6.38-13 on Linux Mint 11

Download drivers for your kernel\\
http://www.sierrawireless.com/resources/support/drivers/linux/v3.2_1740_kernel-2.6.38.directIP.tar

Make dir and untar

    mkdir sierra
    tar xvf v3.2*tar

UNPLUG device

Compile

    make
    sudo make install


Check the sim card, there is a difference between bigpond & telstra sims
Ref: http://forums.whirlpool.net.au/archive/1870382

/home/angelo/bin/sierraoff

    #! /bin/sh
    sudo echo -e "AT+CFUN=0\r" > /dev/ttyUSB2

/home/angelo/bin/sierraon

    #! /bin/sh
    sudo echo -e "AT+CFUN=1\r" > /dev/ttyUSB2

Created this file /home/angelo/bin/sierraconnect and made it executable.
    #! /usr/bin/env python
    #
    import serial, time, sys, re
    #
    def s_read(lookfor, timeout_secs = 1):
      str1 = ''
      str2 = ''
      endtime = time.time() + timeout_secs
      while (str2.find(lookfor) < 0) and (time.time() < endtime):
        str1 = uport.read(999999)
        if len(str1): str2 += str1
        time.sleep(0.2)
      return str2
    #
    okresp = '\nOK\r\n'
    #
    port = '/dev/ttyUSB2'
    try:
      uport = serial.Serial(
        port,
        baudrate = 115200,
        bytesize = 8,
        stopbits = 1,
        parity = 'N',
        timeout = 0.5)
    except:
      print 'Cannot open ' + port + ', program stopping.'
      sys.exit(1)
    #
    args = sys.argv
    cid = '1'
    if len(args) == 2:
      temp = re.search('([0-9]*)', args[1])
      if temp:
        cid = temp.group(1)
        if cid == args[1]:
          temp = int(cid)
          if temp < 1 or temp > 16:
            print 'Profile ID ' + cid + ' is outside valid range 1 => 16'
            sys.exit(1)
        else:
          print args[1] + ' is not a not a valid profile (range 1 => 16)'
          sys.exit(1)
      else:
        print args[1] + ' is not a not a valid profile (range 1 => 16)'
        sys.exit(1)
    else:
      print 'No profile recognised on command line, using profile 1'
    time.sleep(1)
    uport.write('ATZ\r')
    s_read(okresp, 1)
    uport.write('ATE0\r')
    s_read(okresp, 1)
    #
    # ensure radio is on
    #
    uport.write('AT+CFUN?\r')
    outb = s_read('+CFUN: ', 3)
    if outb.find('+CFUN: 0') >= 0:
      uport.write('AT+CFUN=1\r')
      time.sleep(2)
      s_read(okresp, 10)
    #
    # connect using directIP method
    #
    uport.write('AT!SCACT=1,' + cid + '\r')
    time.sleep(2)
    s_read(okresp, 8)
    uport.close()
    sys.exit(0)

Run with profile 2 for bigpond (Angelo's SIM) or 3 for Telstra sim

    sudo bin/sierraconnect 2

Tried these commands:

    sudo dhclient -r
    sudo dhclient -nw wwan0

Should have a solid blue & green light on device (4G)

Procedure after reboot.
  * Start computer with modem not connected
  * Connect modem once logged in.
  * Wait until you see both solid blue and flashing green lights.
  * turn off with software

     gksudo bin/sierraoff

  * start sierra modem

     gksudo bin/sierraon
     gksudo bin/sierraconnect 2

  * Start dhclient

     gksudo dhclient -nw wwan0

Job done!

This should be in a easy to use GUI, better still this should work within network manager!

Here is the startup script I use and stored in /home/<user>/bin

    #!/bin/sh
    
    sudo /home/angelo/bin/sierraoff
    sleep 2
    sudo dhclient -r wwan0
    sudo dhclient -nw wwan0
    sleep 2
    # Run the first time to turn on the modem
    sudo /home/angelo/bin/sierraon
    sleep 5
    # Run a second time to start the connection
    sudo /home/angelo/bin/sierraconnect 2
    sleep 5
    zenity --info --text="Connection established"

I then made a link to this script on the users desktop with the following command

    gksudo /home/<user>/bin/connect_4g

<html>
<hr>
</html>

Michael Pope 16/03/2012