I managed to add the latest firmware update. After many struggles to achieve all the things that I had in mind, I am happily loading the 4.4 version. 

- Better temperature control,

- Fixed a few bugs

- Better human interface

- More intuitive

- Back light control for the C3 hardware 

Unless I find some other things that really need changing, I pretty much think of this version as being the last one. Stay tuned for the last update which will be the layout for the C3 hardware. Then I can consider this as being another successfully finished project. About the firmware, I have a final note. I am using IAR Embedded Workbench to flash the MCU. I tried Code Composer and it seems like the code is behaving a little bit different. The compiler takes up much more space for converting the instructions to machine code. Therefore, there are some segments of code that are running at different speeds and the things are not quite fitting together.