[Klug-general] Raspberry Pi Serial terminal server

[Michael Miller]

Hello,

You could check raspberrypi.org:- http://www.raspberrypi.org/
Click on Forum, and in the search box 'stakis3g', lots of hits.
As you are getting random crashes and have a 2A power supply, its still possible the voltage is down, under load.
Check the voltage on the Pi, TP1 to TP2, try it with nothing plugged in except the power supply, plug things
in one at a time, check the voltage. Are you overclocking? Check the voltage under heavy CPU load.
Does your powered hub backfeed power to the Pi?
I'm using a 5.25V - 2A power supply, after it gets to the Pi through the cables and connectors. it drops to
5.1V and under load to 5.06V (I'm overclocking to 1Ghz) and a 7 port hub with a 3A power supply.
About 4.85V TPI to TP2 is a working minimum under load.

Regards

From: Mike Giles 
Sent: Thursday, January 09, 2014 8:28 AM
To: Kent Linux User Group - General Topics 
Subject: Re: [Klug-general] Raspberry Pi Serial terminal server

Hi Michael,
Thanks very much for the info, I will give this a go.
I guess I can leave ser2net in rc.local ?

Best Regards,
Mike 


  ----- Original Message -----

  From: Michael Miller

  Sent: 01/08/14 11:58 PM

  To: Kent Linux User Group - General Topics

  Subject: Re: [Klug-general] Raspberry Pi Serial terminal server

    
  Hello,

  To setup sakis3g
  http://lawrencematthew.wordpress.com/2013/08/07/connect-raspberry-pi-to-a-3g-network-automatically-during-its-boot/
  There is a note about stopping and starting the service without a reboot.

  Regards
  Michael

  From: Mike Giles
  Sent: Tuesday, January 07, 2014 1:41 PM
  To: kent at mailman.lug.org.uk
  Subject: [Klug-general] Raspberry Pi Serial terminal server

  Good Afternoon,
  I'm working on an HNC assignment using a Raspberry Pi model B running
  wheezy-raspian.
  I'm a Linux Novice.
  The Kernel is:
  pi at raspberrypi /usr/bin/modem3g $ cat /proc/version
  Linux version 3.6.11+ (dc4 at dc4-arm-01) (gcc version 4.7.2 20120731
  (prerelease) (crosstool-NG linaro-1.13.1+bzr2458 - Linaro GCC 2012.08) )
  #538 PREEMPT Fri Aug 30 20:42:08 BST 2013

  I have been using sakis3g and ser2net to connect the RPi to the cellular
  network and act as a serial terminal server. (based on various posts and
  blogs)
  I have added the following to rc.local in an attempt to connect to the
  mobile network and configure the serial terminal server.
  ****
  #!/bin/sh -e
  #
  # rc.local
  #
  # This script is executed at the end of each multiuser runlevel.
  # Make sure that the script will "exit 0" on success or any other
  # value on error.
  #
  # In order to enable or disable this script just change the execution
  # bits.
  #
  # By default this script does nothing.

  # Print the IP address
  _IP=$(hostname -I) || true
  if [ "$_IP" ]; then
    printf "My IP address is %s\n" "$_IP"
  fi

  (sleep 2;sudo /usr/local/sbin/ser2net -c /etc/ser2net.conf -n) &
  #sudo /usr/bin/modem3g/sakis3g connect
  (sleep 5;sudo /home/pi/connect.sh) &
  exit 0

  ****
  connect.sh
  ****
  #!/bin/bash
  # script to connect to mobile network
  echo "Running Sakis3g"
  sleep 10
  sudo /usr/bin/modem3g/sakis3g connect --console APN=CUSTOM_APN
  CUSTOM_APN='apn' APN_USER='user' APN_PASS='password' USBDRIVER=option
  USBMODEM=12d1:1003 OTHER=USBMODEM MODEM=OTHER
  ****
  This normally works from a power on but often doesn't from a reboot.
  I would like to debug the boot sequence to try and make this more reliable
  however I'm not sure how to enable/capture the debug output, I can't see
  anything in /var/logs.
  Is there any debug I can enable or re-direct the console output to a file ?

  I have found that the 3g modem is not always listed in lsusb.

  I also experience random hangs/crashes and a power cycle is required to
  recover. I'm not sure if this is hardware related. I have a 2A power adapter
  and a powered USB hub that has the 3g modem, wifi adapter, mouse and
  keyboard connected to it. The RPi will run for varying lengths of time.
  Any debug help would be much appreciated.
  Best Regards,
  Mike


  _______________________________________________
  Kent mailing list
  Kent at mailman.lug.org.uk
  https://mailman.lug.org.uk/mailman/listinfo/kent




--------------------------------------------------------------------------------
_______________________________________________
Kent mailing list
Kent at mailman.lug.org.uk
https://mailman.lug.org.uk/mailman/listinfo/kent
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.lug.org.uk/pipermail/kent/attachments/20140109/6738f3b4/attachment-0001.html>