BMP3XX.update_sea_level_pressure

You're seeing just the function update_sea_level_pressure, go back to BMP3XX module for more information.
Link to this function

update_sea_level_pressure(server \\ __MODULE__, new_estimate)

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Specs

update_sea_level_pressure(GenServer.server(), number()) :: :ok

Update the sea level pressure estimate

The sea level pressure should be specified in Pascals. The estimate is used for altitude calculations.