weather-station, branch masterA small weather monitoring station setuphttps://git.yuv.al/weather-station/atom/?h=master2026-03-17T11:01:26ZFix journald logging: use python -u for unbuffered stdout2026-03-17T11:01:26ZYuval Adam_@yuv.al2026-03-17T11:01:26Zurn:sha1:61cf431e9e8866d5038c553c6e4e5594c5c6d003Fix systemd unit: use /usr/bin/python (has paho-mqtt on 3.14)2026-03-17T10:59:49ZYuval Adam_@yuv.al2026-03-17T10:59:49Zurn:sha1:2b4313e6415fdd3e777721417cd4a492ceb6593cAdd systemd unit for running weather-board on boot2026-03-17T10:56:44ZYuval Adam_@yuv.al2026-03-17T10:56:44Zurn:sha1:193048e1e40ab0820c4525c439efaafcaa2d2e6e
Install with:
sudo cp weather-board.service /etc/systemd/system/
sudo systemctl daemon-reload
sudo systemctl enable --now weather-board
Add MQTT Home Assistant script with auto-discovery2026-03-17T10:53:22ZYuval Adam_@yuv.al2026-03-17T10:53:22Zurn:sha1:e97d3ae12b04745e785311d9125261557ac21fd3
Reads BME280 (temperature, humidity, pressure) and SI1132 (UV index,
visible light, IR) and publishes to MQTT with HA discovery. All six
sensors appear under a single 'Weather Board' device in the Office room.
MQTT broker: 192.168.1.135:1883 (co2meter/co2meter)
Publishes a shared JSON state topic every 10 seconds.
Discovery configs are retained so HA picks them up on restart.
Fix 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.
Update README.md2019-08-11T09:50:48ZYuval Adam_@yuv.al2019-08-11T09:50:48Zurn:sha1:2e79de0ad5024f6c0e53f1c10ce795c05cfb5416Update README.md2019-08-11T09:16:02ZYuval Adam_@yuv.al2019-08-11T09:16:02Zurn:sha1:8718f49d48686fbca761883547090bb045951955Add README2019-08-11T06:36:21ZYuval Adam_@yuv.al2019-08-11T06:36:21Zurn:sha1:5e09e939c8b32ea11d4cfad3fe75a03ee2f9d413Initial files2019-08-11T06:35:18ZYuval Adam_@yuv.al2019-08-11T06:35:18Zurn:sha1:fac8f54cd87771912dee8556597bee1d1269ea62