Found a useful youtube video talks about how raspberry talks to hardware.
Like how to light an LED (part 1) and how to get input from close circuit switch.
Thanks to TheRaspberryPiGuy
Part 1
Part 2
Found a useful youtube video talks about how raspberry talks to hardware.
Like how to light an LED (part 1) and how to get input from close circuit switch.
Thanks to TheRaspberryPiGuy
Part 1
Part 2