Enterprise WPA troubles

-

Two gadgets we've got recently refused to access the university wireless network. The reason is that WPA with an EPA-PEAP autentication server is used on UPV campus. The ASUS eeePC that comes with Xandros Linux does not support that. Alternatively I could use the eeePC built-in VPN to connect to a secondary wireless network, but again, that software did not work either.

The Nokia E71 cellphone does support WPA Enterprise, but contrary to other wifi setup that can be done on the fly, the so called WPA Enterprise is hidden down there in the system configuration menus.

The solution I took for the eeePC was quite radical as I installed eeeXubuntu. There is a special Xubuntu version that worked for me. You create a boot image on a USB flash dish to get it installed on the eeePC. One word of warning though: I you accept to install system updates, each new kernel update will break the Atheros wireless driver (it can be rebuilt later, but it's a manual process).

The solution for E71 was to ask our Computer Center helpdesk. Again, the process was documented on our web, but not very visible when searching unless you know in advance where to look.

Comments

sandy said…
can you please point me to the Instructions to connect the Nokia E 71 to an WPA enterprise network
Thanks In Advance
9:32 am
misan said…
You've got to go to Tools/Settings/Connection/Access points and then select the network you want to join. Then scroll down filling in all the different options. Please remember to install a digital certificate (if needed) and set the right EAP protocol (you may need to ask which one to use for your network).
10:00 am
Post a Comment

Popular posts from this blog

VFD control with Arduino using RS485 link

-
Image
Variable Frequency Drives ( VFD ) allow the control of spindles so speed can accurately be controlled and a detailed acceleration profile for the spindle and reverse rotation can all be handled. In essence a VFD is an three phase inverter for three-phase AC motor. I am using a popular (I mean cheap) Chinese VFD and though the reference manual is not great, I could see there is a built-in RS-485 port. I usually control the start, stop and speed selection using the keyboard on the unit but I thought it will be more useful if I could control everything from the same Arduino is doing our CNC table control. Some cheap RS-485 off eBay and some lines of code later, I can start, stop and change the speed from an Arduino. What a cool thing to have! Some configuration of your VFD are needed before you can use it like that.  You need to set PD163=1 (I am using address 1 in the code). PD=164=1 (for setting serial to 9600bps) and PD165=0 (for using ASCII and 8N1 character for...
Read more

How to get sinusoidal s-curve for a stepper motor

-
Image
After some experimentation, and delving a bit into the math of motion, I realized there can be a significant difference on the motion of a machine by just making small changes. A common and popular approach to smooth one axis of motion is to use a trapezoidal speed pattern, where acceleration and deceleration are uniformly accelerated movements (aka constant acceleration motion) separated by a portion happening at cruising speed. The problem comes with the fact that, while that approach is simple to understand and to code, it does contain sudden changes in the acceleration, that show as spikes on the acceleration derivative, called jerk. These sudden changes in the acceleration translate into undesired vibration in our machines. Most of that can be eliminated by selecting a motion pattern that does not contain sudden changes of acceleration. If we chose a mathematical function for our speed whose second derivative is continuous, then we reduce system vibration quite a lot. One ma...
Read more

Importing OpenSCAD designs into Onshape

-
Image
After using Onshape CAD software for a while I am really fond of it. So one natural thing to do, specially once they have released the Instructor's kit is to start using it in the classroom too. But one thing I was not so sure how to do was to use old designs I made using OpenSCAD. It does not mean I am completely quitting using OpenSCAD but suddenly I can see I can do assemblies in Onshape that will look quite nice for showing and documentation purposes if only I could easily import from OpenSCAD. I am glad to report that the route OpenSCAD --> FreeCAD --> Onshape worked brilliantly. Even more when a few tricks were applied. While some people suggest to import CSG files from OpenSCAD to FreeCAD, I have had more success by directly importing SCAD files into FreeCAD. One trick that worked well for me was to get rid of $fn references, so now circles become real circles (or cylinders) in FreeCAD. If a part keeps some $fn references then your cylinders or circles wi...
Read more