weather-station/BME280.py, branch masterA small weather monitoring station setuphttps://git.yuv.al/weather-station/atom/BME280.py?h=master2026-03-17T10:49:42ZFix 5 bugs in BME280.py verified against Bosch BME280_SensorAPI and Adafruit references2026-03-17T10:49:42ZYuval Adam_@yuv.al2026-03-17T10:49:42Zurn:sha1:3a3d6ed1adc009cc6efee8e0b416137a8d17bb89
1. get_power_mode() missing parentheses in set_oversamp_pressure and
set_oversamp_temperature โ compared method object instead of calling it,
so sleep-mode check never worked correctly.
2. set_oversamp_humidity else branch wrote ctrl_hum_reg into CTRL_MEAS
register instead of ctrl_meas_reg (per datasheet ยง5.4.3, humidity
settings require a subsequent write to ctrl_meas with the correct value).
3. dig_H6 stored as unsigned byte โ should be int8_t per Bosch
bme280_defs.h and Adafruit_BME280.h.
4. dig_H4/H5 sign extension wrong โ used to_s16() on 12-bit signed values.
Now sign-extends from MSB byte first (to_s8) then combines with LSB
nibble, matching Bosch parse_humidity_calib_data() and Adafruit
readCoefficients().
5. Humidity compensation formula was missing var5 multiplication factor
vs Bosch compensate_humidity() (BME280_DOUBLE_ENABLE path). Rewritten
with Bosch variable names for easy cross-referencing.
Initial files2019-08-11T06:35:18ZYuval Adam_@yuv.al2019-08-11T06:35:18Zurn:sha1:fac8f54cd87771912dee8556597bee1d1269ea62