Hello! I'm sorry if it is not the place to ask. Soon I am going to move from appartment to my home and I want to make a simple security system.
It will be a set of reed switches and magnets or Hall's sensors mounted on the doors and few windows. The sensors will be connected to attinys or Arduinos which over some radio transmitter will send data to the receiver on raspberry pi to analyze further.
I saw that there are some options in the radio interfaces. But I cannot decide which one to choose. The problem is that I need a few, at least 2 transmitters that must work together without interference. Also I need some transmitters that are energy efficient and have a small amount of wires(to connect to attiny). The connection speed is not crucial at all as well as coverage range.
Help me please to choose the right radio-modules. Thank you!