mirror of
https://github.com/meshtastic/firmware.git
synced 2026-09-16 16:41:24 -04:00
Thomas Göttgens
5b787fc636
The firmware design docs were published to meshtastic/meshtastic in #11488 and the directory was deleted. bme680_iaq_replay.md re-added it. The replay harness build command moves into the header comment of bin/bme680_iaq_replay.cpp, the only file that referenced the document.
102 lines
3.0 KiB
C++
102 lines
3.0 KiB
C++
// Replays a captured BME680 CSV trace (gas_ohms,rh[,bsec_iaq]) through
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// BME680IaqEstimator for offline tuning. Build from the repo root:
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// c++ -std=c++17 -O2 -I src -o /tmp/iaq_replay bin/bme680_iaq_replay.cpp src/modules/Telemetry/Sensor/BME680IaqEstimator.cpp
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#include "modules/Telemetry/Sensor/BME680IaqEstimator.h"
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#include <cmath>
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#include <cstdio>
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namespace
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{
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// Same buckets the device UI uses (EnvironmentTelemetry drawFrame)
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int band(int iaq)
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{
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if (iaq <= 25)
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return 0; // Excellent
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if (iaq <= 50)
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return 1; // Good
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if (iaq <= 100)
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return 2; // Moderate
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if (iaq <= 150)
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return 3; // Poor
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if (iaq <= 200)
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return 4; // Unhealthy
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if (iaq <= 300)
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return 5; // Very Unhealthy
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return 6; // Hazardous
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}
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} // namespace
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int main(int argc, char **argv)
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{
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FILE *in = stdin;
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if (argc > 1) {
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in = fopen(argv[1], "r");
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if (!in) {
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fprintf(stderr, "cannot open %s\n", argv[1]);
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return 1;
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}
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}
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BME680IaqEstimator est;
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char line[256];
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long lineNo = 0, n = 0, skipped = 0, produced = 0, compared = 0, bandHits = 0;
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double absErrSum = 0;
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printf("n,gas_ohms,rh,est_iaq,bsec_iaq\n");
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while (fgets(line, sizeof(line), in)) {
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lineNo++;
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if (line[0] == '#' || line[0] == '\n')
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continue;
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float gas, rh, bsec = NAN;
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int fields = sscanf(line, "%f,%f,%f", &gas, &rh, &bsec);
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if (fields < 2) {
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// Tolerate one header row silently; anything else malformed is
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// reported so a damaged trace can't produce a quiet, biased summary
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if (lineNo > 1) {
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skipped++;
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fprintf(stderr, "skipping malformed line %ld: %s", lineNo, line);
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}
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continue;
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}
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n++;
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uint16_t iaq;
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bool got = est.update(gas, rh, &iaq);
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bool haveBsec = fields >= 3 && std::isfinite(bsec);
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printf("%ld,%.0f,%.2f,", n, gas, rh);
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if (got)
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printf("%u", (unsigned)iaq);
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if (haveBsec)
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printf(",%.0f\n", bsec);
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else
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printf(",\n");
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if (got) {
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produced++;
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if (haveBsec) {
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compared++;
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absErrSum += std::fabs((double)iaq - (double)bsec);
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if (band(iaq) == band((int)std::lround(bsec)))
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bandHits++;
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}
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}
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}
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if (ferror(in)) {
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fprintf(stderr, "input read error at line %ld\n", lineNo);
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if (in != stdin)
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fclose(in);
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return 1;
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}
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fprintf(stderr, "samples: %ld, estimator outputs: %ld, malformed lines skipped: %ld\n", n, produced, skipped);
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if (compared) {
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fprintf(stderr, "vs BSEC (%ld comparable): mean abs error %.1f IAQ points, band agreement %.1f%%\n", compared,
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absErrSum / compared, 100.0 * bandHits / compared);
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}
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if (in != stdin)
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fclose(in);
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return 0;
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}
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