https://tsvinc.dev/tags/openbeken/ Recent content in Openbeken on tsvinc Hugo en-us Fri, 16 Oct 2026 00:00:00 +0000 https://tsvinc.dev/posts/tuya-plug-openbeken-grid-canary/ Fri, 16 Oct 2026 00:00:00 +0000 https://tsvinc.dev/posts/tuya-plug-openbeken-grid-canary/ <p>The smart plug's vendor app put its energy monitoring behind a subscription. The metering chip inside measures voltage alongside current and power all the same, whatever the app agrees to show. I wanted that voltage. Read off a plug on wall power, it says whether the grid is up, and my <a href="https://tsvinc.dev/posts/bluetti-ac180-ups-over-bluetooth/">power-station UPS</a> needed exactly that: a second opinion on the grid from something not behind a battery.</p> <p>So the plug had to leave Tuya's firmware for <a href="https://github.com/openshwprojects/OpenBK7231T_App">OpenBeken</a>, an open firmware for the Beken chips in most Tuya plugs. That took one evening. Getting the pins right took the next day, because the template I borrowed was for a different plug, and the plug's own leftover settings were the only thing that knew.</p>