Why My ESF-551 Scale Kept Disconnecting from Home Assistant: Japan's Measurement Act
I connected an Etekcity ESF-551, a BLE body scale, to Home Assistant, and not a single measurement arrived. I had Claude Code chase the cause, and it ended at Article 9 of Japan's Measurement Act. Units sold in Japan have the unit switch removed because of that law. I know nothing about firmware or…
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- 2026-11-01 05:45 · DEV Community — AI
Why My ESF-551 Scale Kept Disconnecting from Home Assistant: Japan's Measurement Act