OptionalfilterThe IIR filter's three-bit filter[2:0] code, 0 for the filter off, written as given.
OptionalpressureThe pressure oversampling code, 0..=5, where 0 skips the measurement.
OptionaltemperatureThe temperature oversampling code, 0..=5, where 0 skips the measurement.
How a BMP280 driver measures. A field left out keeps the default: both measurements at oversampling x1 and the filter off.