Errata

In third paragraph, configuring you compiler should be;
configuring your compiler

In bottom paragraph, you have to do a lot would more correctly be;
you had to do a lot

Also hundreds of different processor should be;
hundreds of different processors

always unplug then replug the USB would read better as;
always disconnect then reconnect the USB

Last paragraph, LEDs are directional components might better be;
LEDs are polarised components

and the shorter leg corresponds to ground might better be;
the shorter leg corresponds to the negative (cathode)

First paragraph; then translate you program should be;
then translate your program ...

"and orientated" should be; and orientate

Comment // we have just turned of should be;
// we have just turned off

Redundant "a" in sentence.
Change ... is actually a really hard to do ... to;
... is actually really hard to do ...

the instructions and the wired the should be;
the instructions and wired the breadboard

the construct off of should be; from

All other English speakers in the world (except Americans) use the word FROM" instead of "OFF OF"
i.e. I got the money FROM him NOT, I got the money OFF OF him!

OR

I downloaded it FROM the Internet NOT, I downloaded it OFF OF the Internet!

digital i/o pins should be digital I/O pins

50 kOhms should perhaps use the omega symbol for Ohms??

... dealing with sensor network) should be;
... dealing with sensor networks)

"Alternatively, if you're going to be us XBee modules"
"us" should be "using"
"Alternatively, if you're going to be using XBee modules"

...easily add code that can product a different ..... should be;
.... easily add code that can produce a different ...