https://davidokello.com/blog Software engineering notes from David Okello. https://davidokello.com/blog/building-majiguard-what-actually-went-wrong https://davidokello.com/blog/building-majiguard-what-actually-went-wrong A build log for my final year water quality monitor: two dead sensors, a voltage mismatch, a turbidity sensor that could not tell room light from cloudy water, and the machine learning that ended up separating real contamination from a broken probe. Wed, 09 Sep 2026 06:44:10 GMT