Working on my 1st LED light box.

Working on my 1st LED light box.

A post shared by Wann Senn (@snn.x) on


Raspberry Pi vs Gumstix

I have received Gumstix Robovero to play around with. On top of from the picture is Raspberry Pi B and from Gumstix Robovero at the bottom.

ImageWith a RoboVero featuring a standalone ARM® Cortex™-M3 driven LPC1769 microcontroller and a Wifi/Bluetooth-enabled Overo AirSTORM computer-on-module running Ubuntu with Robot Operating System (ROS), the Gumstix Robotics Development Kit makes it quick and easy to get started on your robotics project. Featuring many header pins and the ability to drive the microcontroller independently via a HubCommander™ interface, the Robotics Development Kit is ideal for motor control applications.

Monitor your Raspberry Pi with Nagios using SNMP


This is a quick note to monitor your Raspberry Pi  running Raspbian with Nagios.  I assumed you have Nagios running and configured on your side.

*I will improve this note from time to time.

1. Install SNMP on Raspberry Pi

root@sennpi:/home/senn# apt-get install net-snmp*
root@sennpi:/home/senn# mv /etc/snmp/snmpd.conf /etc/snmp/
root@sennpi:/home/senn# nano /etc/snmp/snmpd.conf
root@sennpi:/home/senn# /etc/init.d/snmpd restart

2. Install Nagios SNMP Plugins

root@sennpi:/home/senn# wget
root@sennpi:/home/senn# ./configure; make; make install
root@sennpi:/home/senn# yum install net-snmp*

3. Test your connection from nagios-server to Raspberry Pi

root@sennpi:/home/senn# ./check_snmp_process -H -C public -m sshd -w 30 -c 50

4. Edit your Nagios configuration file

define your new service at /usr/local/nagios/etc/objects/switches.cfg

define service{

use   generic-service ;

Inherit values from a template

host_name  Raspberry_Pi

service_description Running Service SSHD

check_command  check_snmp!-C public -m sshd -w 30 -c 50



define service{

service ; Inherit values from a template

host_name  Raspberry_Pi

service_description Running Service - Remote Desktop Xtightvnc

check_command  check_snmp!-C public -m Xtightvnc -w 30 -c 50  }

enable command at /usr/local/nagios/etc/objects/commands.cfg

# 'check_snmp_process' command definition

define command{

command_name    check_snmp_process

command_line    $USER1$/check_snmp_process -H $HOSTADDRESS$ $ARG1$


Introduction of Hyperloop – future of public transportation.


What would be our next transportation look like? I found this good documentation called “Hyperloop Alpha” This is basically an introduction of hyperloop itself, ideas on how could it be implement, technical explanation and solar energy, geographical & coordination and the story behind it. Beside that it explains on how this new technology be able to reduce time to travel from dedicated destination……

Continue reading

PACS – Picture Archiving and Communication System (PACS)


So many things to play within limited time frame.

OK! This is what have been focusing in last few weeks.

PACS is a combination of hardware and software dedicated to the images archiving. The biggest consumers of PACS are hospitals. PACS main purpose is to replace hard film copies with digital images that can be used and seen by several different medical professionals and different medical automation system simultaneously.

The system’s server contains the image database. The clients connect to the server through a local area network (LAN) or a wide area network WAN). The network type selected depending on the infrastructure capability, like in Malaysia most of the clients connected through LAN.

New PACS system usually integrated with web-base feature for easy remote access from PACS workstation and can be use over LAN and WAN. Remote access makes it easier and more convenient for several different practitioners to view the same information simultaneously. PACS also makes it easier for radiologist to manage patient exam workflow.

P/S: I will try to cover DICOM protocol soon.

MCMC investigates The Malaysian Insider for spyware reports.


Malaysian Communications and Multimedia Commission (MCMC) is investigating the news report issued by local online news portal, The Malaysian Insider, at around 3:00 pm yesterday with the headline stating “Malaysia Uses Spyware against Own Citizens, NYT Reports”.

MCMC would like to state that this report is speculative and ill- researched.

More story –