4×4 inclinometer

For those who are interested in knowing how steep is your N900, or the object that supports it. Meet the 4×4 inclinometer.

I developed it to use in my car, hence the name 4×4 inclinometer. Using this application I can know the slope of the obstacles or the ground below my car.

According to the manual of the car, it can be in an angle of heel of 45 degrees with no problem, something higher than this is at my own risk. When I read this information, just imagined the software for the N900)

The current version depends on Qt 4.6 with the animation framework. The animation is used to rotate the images of the car, smoothing the movement. I am not an expert in gimp, so forgive me for the images poorly done. Next version I will put a simple support for themes.

The intallation files are already in extras-devel, so you just need to apt-get it. And the sources are available at:

http://git.zimmerle.org/?p=inclinometer.git;a=summary

The car image and the application background are Trademark of Troller Veiculos Especias S/A, http://www.troller.com.br

mWall :: netfilter + ui for maemo

Something that certainly bothers me is the fact that i am always online independent of the network. I walk with my n900 in the pocket and sometimes I am using 3g, sometimes using wifi. I am jumping from trusted to untrusted wifi spots, and I have the strange feeling that maybe once (or more…) I will be part of a honeypot, malicious network or something like that.

As part of this type of network my device can be easily identified as an N900. (e.g. MAC address). Once the device is identified a person or a malicious software can start to guess passwords (rootme?) and can try to exploit softwares that are under development.

Avoiding been hacked on that situation I decided to write a small firewall UI for the n900 (netfilter/iptables back end), that allows me to block any incoming connection that is not authorized.

This is just a very first version of the firewall, a lot to be done yet. To install it on your device, check for mWall at my personal repository.

You can install my repository by clicking here: zimmerle’s repo.

I also provide in my repository: the iptables package and a kernel with support to iptables state match. The iptables binary was marked with the suid bit, allowing its execution by users without super powers. But this should be fixed in the next release.

Let me advise you that the firewall rules are not permanent, I mean, you need to run the firewall in every boot. It is under development.

The code is available at: http://git.zimmerle.org