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We need to implement a median over the sensor data and predefine a frequency to save the sensor data to the database (on the SD card).

assigned to @edzweistein

marked this issue as related to #10

marked this issue as related to #9

Furthermore to not fill up the SD card, we will need some sort of rotation of the data or the local database only stores a certain timeframe (e.g. caches data from the last two days).

We agreed on only persisting 1,5 years of data in the local DB on the SD card to not run out of space on the SD card:

When saving data every once a minute we would increase the id value of the datastructure by ~525783. This could be an indicator to delete all rows before we hit an id which meets the following criteria:

id % 525783 == 0