# Editing Mer/Documentation/BME Protocol

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To invert this function to find idle time remaining (on assumption that the device was idle when the register was read), first see whether the adc#8 value is above or below 438.3, which tells you which exponential is dominant, and approximate the other exponential with a constant 3 (or a straight line if you like); can iterate and update this approximation for the neighbourhood of the solution found by the previous iteration. -- pjrm | To invert this function to find idle time remaining (on assumption that the device was idle when the register was read), first see whether the adc#8 value is above or below 438.3, which tells you which exponential is dominant, and approximate the other exponential with a constant 3 (or a straight line if you like); can iterate and update this approximation for the neighbourhood of the solution found by the previous iteration. -- pjrm | ||

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