PCI GW-MF54G2 Serial Output

RXD and TXD must be cross-connected to serial adapter

RXD GND TXD VCC
 ______
|  ....| <- serial
|      |
|      |
|      |
 ----||  <- antenna


Remove Orphan Packages on Arch Linux

1. remove a package's dependencies which are not required by any other installed package

sudo pacman -Rs

2. list all packages no longer required as dependencies

sudo pacman -Qdt

3. combine both commands

sudo pacman -Rns $(pacman -Qqtd)

-n, --nosave # delete .pacsave backup files
-q, --quiet # show less information for certain sync operations

Install Maemo 5 SDK on Arch Linux

1. download GUI Installer made with python from http://www.forum.nokia.com/Tools_Docs_and_Code/Tools/Platforms/Maemo/

2. according to http://wiki.maemo.org/Documentation/Maemo_5_Final_SDK_Installation, the python script needs to be modified for non-debian linux

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< SB_PATH = "/scratchbox"
---
> SB_PATH = "/opt/scratchbox"
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> opt = opt + "-s /opt/scratchbox"
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> cmd = cmd +" -s /opt/scratchbox"

3. then run the installer

sudo python ./maemo-sdk-install-wizard_5.0.py

4. start the Xephyr xserver

Xephyr :2 -host-cursor -screen 800x480x16 -dpi 96 -ac &

-host-cursor # re-use exisiting X host server cursor
-screen WIDTHxHEIGHT # specify screen characteristics
-dpi # screen resolution in dots per inch
-ac # disable access control restrictions
-help # prints message with these options

5. disable vdso support in the host's kernel

vi /etc/sysctl
--

# Disable VDSO support
vm.vdso_enabled = 0

6. load in sysctl settings from the file

sudo sysctl -p

7. log out and log back or login to the new group in the current session

newgrp sbox

8. login to scratchbox

/opt/scratchbox/login

9. set the DISPLAY variable to match the display setting given for the Xephyr server

[sbox-FREMANTLE_X86: ~] > export DISPLAY=:2

10. start the ui framework

[sbox-FREMANTLE_X86: ~] > af-sb-init.sh start

11. method to shutdown

[sbox-FREMANTLE_X86: ~] > af-sb-init.sh stop

12. if your linux is non-debian based, start scratchbox manually when the system is rebooted

sudo /opt/scratchbox/sbin/sbox_ctl start


Check The Bandwidth of Network

iperf is a tool for performing network throughput measurements.

1. install iperf on both nodes

arch linux

sudo pacman -S iperf

windows version can be downloaded from http://www.noc.ucf.edu/Tools/Iperf/

2. one node acts as server, the other node would be client
start listening on server side

iperf -s

3. start connecting to server on client side

iperf -c -w 2m server_ip

# -w 2m adjust windows size to 2 mbytes

4. result should appear in a few secs like this

[1924] 0.0-10.0 sec 111 MBytes 92.9 Mbits/sec