Now we will continue with the code.
At the the first try I encounter some problems, for it to work double check that all the libraries included and if one is not working try downloading it again
Here is the code for the trasmitter:
For the second arduino, the receiver you can use the following code
Once again, I had some troubles with the screen, since it has a lot of conections is really easy to misconect one. After double checking the conection rotate the knob of the potentiometer to adjust the brightness and make it visible.
For the final test I powered one arduino with another laptop and checked it was working, here are the final results