+1 for individual character undo, and maybe have a prefs setting to set a limit if people want that function.
I like the update.Is there anyway to improve the highlight error display. Currently the package highlights the line where it thinks the error is, however I am not sure that it is taking into account any comments because it always highlights a line earlier in the buffer than were the error is.
// prints title with ending line break Serial.println("ASCII Table ~ Character Map");
The circuit: No external hardware needed.