I am getting a raspberry pi for my birthday and decided to do a little research. While following a few tutorials I noticed that they all are using different raspberry pi machines for each project.
I was wondering if it's possible to use one raspberry pi as a main device to make "API" calls to other devices (preferable wirelessly) without having to buy a separate raspberry pi to communicate with.
I will give a simple example: Lets say I have a plant watering system. And I want to fetch some data about my plant wirelessly. Is there an option to get it to communicate without buying an other raspberry pi?