It aims to show at a high-level what sits between our user software and the hardware itself and why it matters.
Arduino – an Arduino sketch gets compiled directly to object code and this runs directly on the hardware, i.e ‘bare metal’. This is great for directly accessing hardware but bare metal can be a pain, for instance, when it comes to scheduling when different things should run – then you’re on your own.
Raspberry Pi – is a powerful board that runs the Linux operating system, and an interpreter for Python on top of that. While you can do a lot with a Pi,and they are often used for running servers, sometimes it can be overkill for smaller automated tasks, and then you pay the price in power or battery life.