Can you use the I2C port as well as the D2 & D3 pins together? My project works fine with the RGB LCD connected to the I2C port as shown in the manual.
As soon as I put a LED into D3, or a button in D2, reading from the console stops working. As soon as I remove the other components the console works again and everything that is typed gets read.
Any ideas? New to I2C and the LCD!