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One sensor is on one side of a door and the other on the opposite side. Having a wire go over the door seems like it would not only look sloppy but get pinched and damaged.
If I need to leave the XBee in Idle/Receive it seems like that would eat up the battery pretty quick. I’d like the solution to last one a battery for months.
I was thinking the XBee might be overkill and maybe some kind of a wireless switch or relay would be good enough like a Reed Switch/Relay, but I think that be too hard to align the sensors and/or generate enough magnetic field through the door. I’m trying to search around for something else that might work. Let me know if you have any ideas.
Thanks so much for your reply! What do you think about the power consumption of the other device that needs to wait and listen to turn on the LED when its partner device detects motion? It looks the XBee on that end would need to be in Idle/Receive mode which uses 50mA. I was looking at the sleep options on the XBee and it seems like I could sleep it on a schedule and check for signals during waking periods, but that seems a little more complicated since I might have to rebroadcast messages or something on the TX side to take that into account.
I’m also curious if you any suggestions to optimize my design. The range I need for this is very short such as 2 feet. Would another type of wireless comms be better or is their another low power microcontroller/wireless combo that might work better here? I am trying to keep things as simple as possible since this isn’t my expertise and my experience since college is pretty much limited to the arduino. Willing to learn new things though.
Thanks again very much your reply, it is really very helpful to have someone to talk to this about!
