I Built a $15 Smart Home Controller (and Why Phones Are Bad Dashboards)

In my previous post I wrote about how my washing machine and dryer pick their own schedule based on energy prices. That post was about the concept — a Homey app that finds the cheapest window to run your appliances. What I didn't mention was the thing on the kitchen wall that makes it actually usable. Because here's the truth about smart home automation: if the only way to interact with it is through an app on your phone, it won't survive contact with your household. The Problem With Apps I call it the spouse test. If your partner needs to unlock their phone, find the right app, navigate to the right screen, and tap three buttons just to start the dryer at a cheap time — they're going to press the button on the dryer instead. And they'd be right to. A physical device on the wall changes that dynamic entirely. It's always on, always showing the current state, and requires exactly one tap to do the thing. No login, no loading spinner, no "update available" popup. It's the difference betw