Yes, it's
bme280wx from WJCarpenter.
In ~weewx/weewx-data/bin/user/bme280wx.py I changed:
# loginf('BME280 data %s' % bme280data)
logdbg('BME280 data %s' % bme280data)
But no change (debug=0):
Dez 02 18:42:46 raspberrypi-W weewxd.py[394495]: bme280: {'outHumidity': 98.0, 'outTemp': 5.1, 'windDir': 135.0, 'rain_total': 910.0, 'windSpeed': 0.0, 'outTempBatteryStatus': 1, 'dateTime': 1764697363, 'usUnits': 17, 'rain': 0.0, 'pressure': 996.8794121453019, 'inTemp': 20.87991048009717, 'inHumidity': 47.00716895052753}
Dez 02 18:42:59 raspberrypi-W weewxd.py[394495]: bme280: BME280 data compensated_reading(id=90b874ac-5f0e-4dee-ab91-6ff37be85f0f, timestamp=2025-12-02 17:42:59.009837UTC, temp=20.905 °C, pressure=996.95 hPa, humidity=47.03 % rH)
Dez 02 18:42:59 raspberrypi-W weewxd.py[394495]: bme280: {'outHumidity': 98.0, 'outTemp': 5.1, 'windDir': 135.0, 'rain_total': 910.0, 'windSpeed': 0.0, 'outTempBatteryStatus': 1, 'dateTime': 1764697375, 'usUnits': 17, 'rain': 0.0, 'pressure': 996.9454680536317, 'inTemp': 20.905063962284476, 'inHumidity': 47.0306761168033}
Dez 02 18:43:10 raspberrypi-W weewxd.py[394495]: bme280: BME280 data compensated_reading(id=e62d5c77-9d93-45ca-a37c-f2050e454beb, timestamp=2025-12-02 17:43:10.939289UTC, temp=20.870 °C, pressure=996.95 hPa, humidity=47.02 % rH)
This looks to me, like the log-messages are written by weewxd.py.