I currently have a door bell with an apparent 50m range. Now I know this means 50m line of sight in the middle of a field, however this barely reaches 10m within my property and is very unreliable.
As such I was looking at a better door bell, probably one with a 200m range.
I notice some work on 433MHz and some work on 868MHz. My physics knowledge that I have vaguely remembered tells me that higher or lower frequencies will penetrate walls more successfully... have I remembered this right? And if so, do I want a lower or higher frequency bell?
As such I was looking at a better door bell, probably one with a 200m range.
I notice some work on 433MHz and some work on 868MHz. My physics knowledge that I have vaguely remembered tells me that higher or lower frequencies will penetrate walls more successfully... have I remembered this right? And if so, do I want a lower or higher frequency bell?