Each iteration through the main function block forces a read from the ADC data buffer to see if there has been any changes and is compared to the current eeprom value and a decision is made to take action or not.

This of course is after the adc is sampled 32 times

That way a single 'noise read' will affect your reading

You have to check the individual reads and 'say' "till n reads y away from old read have been seen, do not use them".

Of course, heavy analog filtering coud do that too; however, a pulse will, with analog filtering, affect the result, with digital filtering it will not.

Erik