Disclaimer: I have no experience or knowledge at this topic. I ask this only from curiosity.
I want to build two devices. Device A should send data to device B. Device B should display the received data on a LCD.
My question is: What opportunities do I have to transmit the data wirelessly over a distance of max. 100 meters?
Edit: Sorry of the low quality question. I'll try to add more information:
I recently bought a Raspberry Pi and it fascinates me.
I started to get interested in electronics in general and thought about two devices (rasbperrys, arduions, w/e) which can send data to eachother.
I read about the possibility to send data via the
434 mhz band but I don't know what I kind of hardware/license (?) I need to do this.