Running mesh with OLSR with Openwrt (backfire)

1. checkout the svn source codes from official SVN repo.

2.update software packages and install them

 ./scripts/feeds update

 ./scripts/feeds install -a -p luci
 ./scripts/feeds install -a -p olsrd

3. compile the Openwrt system with Luci image

4. under Network/Interface, add new interface

5. configure the new created interface

6. configure wifi under Network/Wifi

7. ssh into the node, and edit /etc/config/olsrd, must set 'interface' to 'wl0' as we configure the wifi interface in previous step.
 config  'Interface'
              list 'interface' 'wl0'     
                                                                                                         
8. then start the olsrd, by /etc/init.d/olsrd start

things need to change to enable multiple hop routing

#!/bin/ash

# needed for static multihop routing
echo 1 > /proc/sys/net/ipv4/ip_forward
echo 0 > /proc/sys/net/ipv4/conf/all/send_redirects
echo 0 > /proc/sys/net/ipv4/conf/all/accept_redirects
echo 0 > /proc/sys/net/ipv4/conf/ath0/send_redirects
echo 0 > /proc/sys/net/ipv4/conf/ath0/accept_redirects
echo 0 > /proc/sys/net/ipv4/conf/ath1/send_redirects
echo 0 > /proc/sys/net/ipv4/conf/ath1/accept_redirects
echo 0 > /proc/sys/net/ipv4/conf/ath2/send_redirects
echo 0 > /proc/sys/net/ipv4/conf/ath2/accept_redirects

embedded linux tools for android

Busybox
http://www.androidfanatic.com/community-forums.html?func=view&id=228&catid=9

Iperf
http://www.magicandroidapps.com/wiki//index.php?title=Using_iPerf_for_Android

Rooting Galaxy S2
http://samsunggalaxys2review.org/root-your-samsung-galaxy-s2-heres-how/

enable multi-hop routing
http://thindot.blogspot.com/2011/10/things-need-to-change-to-enable.html

Discontinuation of libhid library in Ubuntu 10.10 causes problems

root@router39:~/mesh-svn-repo/LabBrick-Control# ./LabBrickControl
./LabBrickControl: error while loading shared libraries: libhid.so.0: cannot open shared object file: No such file or directory

all you need to do is to copy /usr/local/lib/libhid.so.0 to the node that needs it.

How to disable GRUB 2 menu, even after crash.

Just wanted to share this with anyone wanting to know.
If your headless server crashes, GRUB2 (at least on Ubuntu Server) is designed to force the GRUB menu to load up next time it starts up, which means you are locked out of SSH until someone physically makes a kernel selection on the PC.

To prevent this do the following change to your grub.cfg file.

#nano /boot/grub/grub.cfg

You want to find this line and change it:

Code:

if [ ${recordfail} = 1 ]; then
  set timeout=-1
else
  set timeout=10
fi

And change to:

Code:

if [ ${recordfail} = 1 ]; then
  set timeout=3
else
  set timeout=10
fi

Or a number other than -1.

when install new kernel image, the system will update this grub.cfg file. Therefore, you also need to change the /etc/grub.d/00_header, find the following function:

Code:

make_timeout ()
{
    cat << EOF
if [ "\${recordfail}" = 1 ]; then
  set timeout=1
else
  set timeout=${2}
fi
EOF
}

So we need to change "set timeout=-1" to "set timeout=1" as well.

Also, please enable the "auto answering feature" for fsck:
/etc/default/rcS

Quote:

cat /etc/default/rcS # # /etc/default/rcS # # Default settings for the scripts in /etc/rcS.d/ # # For information about these variables see the rcS(5) manual page. # # This file belongs to the "initscripts" package. TMPTIME=0 SULOGIN=no DELAYLOGIN=no UTC=yes VERBOSE=no FSCKFIX=no

it is enough to change FSCKFIX=no => FSCKFIX=yes

在Modoer2.0中更换为Google地图后修复“地图坐标不正确” 问题

在./data/cachefiles/item_field_1.php里，找“地图坐标不正确”

 4 =>
  array (
    'fieldid' => '5',
    'modelid' => '1',
    'tablename' => 'subject',
    'fieldname' => 'mappoint',
    'title' => '地图坐标',
    'unit' => '',
    'style' => '',
    'template' => '',
    'note' => '',
    'type' => 'mappoint',
    'listorder' => '4',
    'allownull' => '0',
    'enablesearch' => '0',
    'iscore' => '1',
    'isadminfield' => '0',
    'show_list' => '0',
    'show_detail' => '1',
    'regular' => '/[0-9a-z]+,[0-9a-z]+/i',
    'errmsg' => '地图坐标不正确',
    'datatype' => 'varchar(60)',
    'config' =>
    array (
      'default' => '',
      'size' => '30',
    ),
    'disable' => '0',
  ),


把
'regular' => '/[0-9a-z]+,[0-9a-z]+/i',
改成
'regular' => '/[\-\.0-9a-z]+,[\-\.0-9a-z]+/i',

gcc-linaro not found on OpenWRT

--2011-03-29 19:34:17--  http://downloads.openwrt.org/sources/gcc-linaro.tar.bz2
Resolving downloads.openwrt.org... 78.24.191.177
Connecting to downloads.openwrt.org|78.24.191.177|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2011-03-29 19:34:17 ERROR 404: Not Found.

Download failed.

similar to this

https://forum.openwrt.org/viewtopic.php?id=29329 

The reason is OpenWRT build system don't know what version of gcc linaro to use. 

Solve that by going into "make menuconfig" and enabling the following option:

[*] Advanced configuration options (for developers)--->

[*]   Toolchain Options  --->  

GCC compiler Version (gcc 4.5.x with Linaro enhancements)  --->

(X) gcc 4.5.x with Linaro enhancements