Academy 2013
Networking and Communications

nc6
Bridge shining
 This weeks assignment was to build a wired or a wireless network with at least two nodes.
The first thing I had to do was to mill out the bridge and the two nodes in the milling machine. After that I soldered the boards and connected the bridge to my computer.

Here are the two nodes with the bridge

nc1

Now I had to connect the bridge to my computer with an ftdi cable and an FabISP. I got all the files on the Academy website. Before I programmed the board I had to change the .c file a little bit. In line 41 I had to change the node_id to 0. For the nodes I wrote 1, 2 and 3.
I did this by writing:

      gedit hello.bus.45.c

Now I programmed the board by writing:

      sudo make -f hello.bus.45.make program-avrisp2

      python term.py /dev/ttyUSB0 9600

Now the bridge was programmed and a window opened up. If I pressed 0 on my keyboard the window said "node 0" and the light on the bridge blinked.
Next thing to do was to program each of the nodes by changing the .c file before I programmed it.
When I had programed all of the nodes I connected them all together and ran the python file. Now I could press 0, 1, 2 or 3 and the lights on the circuit boards blinked.

Here is the "node 3" blinking when I press 3

nc4

Here is a picture of the nodes connected to the bridge

                                                 nc2

I also did the same thing with 3 nodes

nc3

I wanted the screen to say something else so I found where it was defined. I found a code that said "node " so I changed it to "bjartur " and "hello " and programmed the boards again. This worked perfectly.

Here are the nodes saying bjartur

nc

  

fablab
Vestmannaeyjar, Iceland