For updated project and download calibration App go here https://builders.ottodiy.com/post/otto-servo-calibration-60ed6d191e56703a7fc5f223
GUI in Processing
The interface I am working on is the one on the right.
If the community is happy with the layout, I'll go ahead and code the buttons and the sliders. I plan to post a video later to check that I have correctly understood what each controller should be doing.
I made this a project so that additional images/graphics can be added and code/videos easily updated.
I am 95% certain that I can code the Nano side of things with what already exists in Blockly 1.4.2. If any ammendments are needed I will request these for the 1.4.3 release.
This will be MUCH friendlier than using Serial Monitor (if it works!).