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kemal
bda42a0468
The board carries two independent thermometers and the code averaged them into temp_raw without ever recording either. Measured over 12 samples on a real station: HTS221 30.973 C at sd 0.060, LPS25HB 29.810 C at sd 0.443, a standing gradient of 1.163 C with the SoC at 44.55 C. Two things follow from that and neither is possible without the raw channels. A plain average of a quiet sensor and one seven times noisier lands at sd 0.223 where inverse-variance weighting reaches 0.060, and the gradient between two chips at different distances from the SoC is a second observation of self-heating that could identify the compensator's k with no reference thermometer. Both need history, and history cannot be backfilled, so the columns land on their own ahead of the work that consumes them. CREATE TABLE IF NOT EXISTS is a no-op against a table that already exists, so adding to COLUMNS would have reached a fresh install and silently missed every station already running, then surfaced as an OperationalError inside insert_telemetry. That sits on the sample loop, so it takes a station down rather than leaving a gap. Store now reconciles the table against COLUMNS on open, which makes every future column addition safe rather than just this one. The simulator gains the same two channels, with couplings solved so their forward models average to exactly the k = 0.55 the compensator is tuned against. Aggregate behaviour is unchanged; only the per-channel detail is new. Simulated temp_raw noise does rise from 0.05 to 0.223, which is not a regression but the end of an over-optimistic figure: it was modelling the quiet sensor and calling it the average.