I spend a lot of time thinking about the gap between what technology promises and what it actually delivers in people’s homes. And there’s one thing that keeps coming up in conversations with people using Home Assistant: presence detection. Everyone’s obsessed with getting it perfect.
The idea is simple, right? Your phone knows where you are, so your smart home should know when you’re arriving or leaving. Lights turn on as you approach. The heating kicks in before you get home. Doors unlock automatically. It sounds magical. But here’s what I’ve learned: chasing that perfect, flawless presence detection is often a waste of energy that leaves people frustrated rather than delighted.
The Myth of Perfect Automation
We live in a culture that values optimization. We want things to work smoothly, predictably, without hiccups. When it comes to home automation, that impulse is even stronger—we’re inviting technology into the most intimate spaces of our lives, so naturally we want it to feel seamless.
But here’s the reality: presence detection is messy. Your phone’s GPS signal bounces off buildings. WiFi networks drop and reconnect. Bluetooth gets confused. You might be home but in the basement working on a project. You might be sitting in your driveway on a work call. You might leave your phone on the kitchen counter while you run out to grab the mail.
The problem isn’t that the technology is bad. It’s that we’re asking it to understand something deeply human—where someone actually is and what they’re doing—using signals that were never designed for that level of precision.
I’ve watched people spend hours tweaking settings, adding multiple presence sensors, combining different detection methods, trying to catch those edge cases where automation fails. They’re treating presence detection like a bug to be eliminated rather than a feature with inherent limitations.
What Actually Matters to Real People
Let me shift perspective for a moment. When people tell me about their home automation dreams, they’re not actually saying “I want my lights to turn on at precisely 47 feet from my front door.” What they’re really saying is:
- “I want to come home to a comfortable space”
- “I don’t want to fumble for light switches in the dark”
- “I want my home to feel like it’s welcoming me”
- “I want one less thing to think about”
Those are emotional needs, not technical ones. And here’s the thing: you don’t need perfect presence detection to meet those needs. You need something good enough that actually works more often than it breaks.
A system that gets it right 85 percent of the time is genuinely useful. A system that you’re constantly babysitting because you’re chasing that last 15 percent? That’s not automation. That’s a hobby project masquerading as convenience.
The best automations I’ve seen aren’t the most complex ones. They’re the ones that handle the common cases well and fail gracefully when things don’t work as expected. Someone doesn’t come home at the usual time? The lights stay off, but they can easily turn them on manually. No big deal.
Building Systems That Work With Reality, Not Against It
So what does this actually look like in practice? It means accepting that presence detection will sometimes be wrong, and designing your automations with that assumption baked in.
It means using presence detection to handle the common, predictable scenarios—coming home from work, leaving in the morning—without trying to account for every possible edge case. It means leaving manual overrides accessible because sometimes the automation just won’t know what you need.
It also means considering other approaches that might be simpler. A motion sensor in your hallway doesn’t care about presence detection at all—it just sees when you’re moving around your home. A simple time-based automation might be more reliable than trying to guess when someone’s arriving. Sometimes the lowest-tech solution is the best one.
The mental burden of maintaining perfect automations is real. Every time your presence detection fails, it erodes trust in the system. You stop relying on it. You start manually turning things on and off anyway. What was supposed to make your life easier becomes another source of friction.
Instead, aim for systems that work reliably most of the time and require minimal intervention when they don’t. Build with graceful degradation. Accept limitations. Your home will feel smarter, and you’ll feel less frustrated.
Home automation should enhance your life, not consume it. The moment you find yourself spending more time troubleshooting presence detection than you would spend just manually turning on the lights, you’ve lost the plot. Stop chasing perfect. Build something that actually serves you.
Source: Stop chasing perfect presence detection in Home Assistant
Tom Harrington