I want to make a very basic radio project that involves two units. One unit has a motion detector that output a high or low and the other that reports that high or low and if possible, can also confirm that it is receiving a signal. I would be fine with it "expecting" a low response and alerting me for either a high or a loss of signal but I would prefer being able to differentiate between the two. I have experience with the arduino but if possible I'd like to avoid it to save power and be able to use batteries.
I'd appreciate any insight but where I'd like to get started it the radio connection. Whenever I google for it I just get info on am/fm broadcast but I'm just interested in simple communication. Just a high/low but maybe on 2-3 frequencies(although just one would really do it). I'm looking for the most economical way of communication at a distance of maybe around 15 meters(however I can be flexible).
Thanks.
I'd appreciate any insight but where I'd like to get started it the radio connection. Whenever I google for it I just get info on am/fm broadcast but I'm just interested in simple communication. Just a high/low but maybe on 2-3 frequencies(although just one would really do it). I'm looking for the most economical way of communication at a distance of maybe around 15 meters(however I can be flexible).
Thanks.