The new firmware is available on my GitHub page here.
I rewrote the code for plotting graphs on the TFT display to make it easier to add more or different sensors and it will be easier to reuse in other projects.
The next step will decided on the final hardware components and designing a circuit board. I want to try and create a finished "product" with the unused pins broken out for possible future expansions to the system.
George Timmermans, Research Toolmaker, Software Engineer and Tinkerer