Additional info to what I just posted - I forgot to mention, now that we're using Digital inputs for the CW and PTT functions, this actually freed up 3 analog lines - A6, A7 and the A3 PTT line so you guys that chose to make the I2C modifications and Digital I/O mods for the CW and PTT inputs, you have your means to implement your S meter, Power and SWR metering.
Oh and I didn't mention that using the I2C bus for the display allows us to use larger standard displays. We've tested one of my 2 uBITX rigs with a 4 X 20 display using the same cheap I2C controller and just a slight software modification to take advantage of the larger display.
The only problem I have with that is the extruded aluminum box front panel layout I chose for the standard display would have to be severely modified to provide room for the large display.
I have a third uBITX coming (they say shipment in about 2 weeks) and I'll put that one into a much larger metal enclosure so I can use the bigger displays.
Jim Sheldon, W0EB