Plantower PMSnnnn modules are pretty damn cheap, easy-to-use, and have had the same interfaces for decade+. The issue is that end consumers downstream aren't de

Plantower PMSnnnn modules are pretty damn cheap, easy-to-use, and have had the same interfaces for decade+. The issue is that end consumers downstream aren't demanding cloudless/optional and FOSS solutions, and so are buying their own latent footguns and landmines. This seems a perfect area in r2r, privacy, and fair play for regulators to insist on stable consumer interfaces, documented formats, circuit schematics, and repair parts available to all to level the playing field and reduce e-waste.