The smart trap line
Walk the line when there's a reason, not every morning in the dark.
What it is
A magnet-and-reed or tilt sensor on each trap, reporting 'sprung' over long-range radio to the house.
The numbers
- Prompt checking is both humane and, in most jurisdictions, legally required within a set number of hours — commonly 24, sometimes less.
- Radio node cost is $25–45 per trap, which is the real constraint: twenty traps is a serious investment.
- Battery life in cold weather is the limiting factor; size the node for the coldest month you'll run it.
Why it's here
It converts a daily obligation into an event-driven one, and it makes compliance with the check interval easier instead of harder. That's a genuine welfare improvement, not just a convenience.
The automation angle
The sensor is trivial. The network is the project — this is radio territory, not Wi-Fi, and it needs a repeater on the high point to cover any real ground.
The catch
False triggers from wind, snow, and curious animals, battery management across a scattered line, and the obvious: it reports, it doesn't dispatch. The legal check interval is still your responsibility — a sensor makes it easier to meet, not optional to meet. Check your own state's rules before you build around this.