Episode Details

Measuring light sounds like the easiest job in home automation, and it turns out to involve device selection, placement, calibration, and one feedback loop that bites everyone who tries it. This episode walks the entire chain: the Aqara Light Sensor T1 and its supply problems, the Xiaomi Mijia puck, the cheap Tuya sensors that cap at 1,000 lux, and the fact that most lux readings in Home Assistant come bundled into motion sensors rather than dedicated devices. Matter standardized the Illuminance Measurement cluster back in 1.0, but as of the August survey only 27 devices implement it, and nearly all of them are motion or presence sensors with lux bolted on. Then there's the automation logic itself, including the bug where turning on your lights raises the reading that turned them on, which turns them off, which drops the reading again. Forever. Episode #974180 — open it directly at myweirdprompts.com/974180