Hyper-local Temperature Display

We are in the thick of a brutal heatwave, which means I am currently playing my favorite seasonal sport: the Window Game. The rules are simple but high-stakes: you trap the cool air inside all day, and then you wait for the exact moment the outdoor temperature drops below the indoor temperature to fling the windows open. The trouble is timing. Up until now, I’ve been relying on the hourly forecasts from the national weather service. But generic city forecasts aren't exactly tailored to my street. My backyard can easily bake a few degrees warmer than the official report, and when you’re desperate to cool down a house, every single degree counts. Time for a quick weekend project. The Hardware Setup A few years ago, I built papercal, a little application that displays our family calendar on a paperd.ink e-ink device. As luck would have it, I had a second one of these devices just lying around in my parts bin. Since the heavy lifting of the codebase was already done, swapping out the…