Process & Reflections

I think it's very interesting to understand how sensors and controllers work. One thing is important is to know the difference between analogRead/Write and digitalRead/Write. There is no such method as digitalRead but we set pinMode to do that. By thinking about we need a boolean value or a value in range, I'm more confident with writing codes. By the way, map() is a good method to change value range. And remembering the electrical connection of all kinds of sensors and controllers is really important!