Hi, guys. I'm brand new to Arduino and have to use it for a school project. It is possible to use a button in location A, and that activates a system in Location B like 100m away?
How would I find/make the button that can do that?
I'm trying to find information online but I'm having some trouble and I thought someone here might be able to help. Thanks, I'm really trying to learn
100m of wire or a wireless system such as lora or wifi depending on requirements. Your question is too vague. Look up the 'How to get the best out of this forum' post at the top of every section.
From your description there is no arduino required. A button is something that makes or breaks a circuit irrespective of distance.
How can that be? There are tons of suitable projects out there regarding communication past that distance.
100m through air, or solid steel and concrete? 
What is the system voltage? How much current will the switch and wire carry?
You can do it by using two Arduino communicating to each other via WiFi or Ethernet,
Sure. You can also put the button on the end of a 100m two conductor wire and just connect it to a switch input on your device.
Still waiting for answers from the OP.
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