I would like to ask about the precision of BME280. Info in the datasheet says that it is +/- 1°C at my given range (0-25°C). Does that mean, that the BME280 will measure at +3°C always the value with e.g. +0.7°C offset, or will the measurement always float around the “real” value (+3°C) with +/- 1°C offset? In other words, would calibration help me get better results, or it does not have any sense to do it?