Hi victor, the drop down box in uProject does not work with the new revision display's.
When the display is still new, the baud rate of the display will be at 19200. However if, while you were playing with it, you accidentally changed the baud rate, you can reset it back to the default.
In order to do this please download the manual as suggested in step 1. In the manual you will find a section titled "Manual Override" with a blown up picture of the pins that you will need to jumper, as well as the instructions on how to do it.
The next step will be to ensure that the display is properly connected to the com port, and receiving power. You may want to consider getting a Communication and Power Cable
if you are having trouble with this.
Once you are certain that the display is connected and powered up properly you may then open uProject, choose the COM port that it is connected to, and then click "Open COM". Once you have opened the com port, you may double check that it is opened by using the contrast and brightness slider. Here I must note, that as long as you are seeing the brightness, or the contrast changing in any
way, you are communicating with the display.
If you are not communicating with the display you will not be able to change the contrast or brightness at all. Sometimes you may notice uProject throwing some garbage characters on the screen when you attepmt to change the brightness/contrast. You may ignore this. However if you are on the wrong baud rate, you will see streams of garbage characters (10-20 at a time).
Once you have reached this step, the rest is easy. Simply procede to step 8.
If you are still having trouble, please tell me at which stage are you having problems?