I found this in the source code for pulseIn(): "/* Measures the length (in microseconds) of a pulse on the pin; state is HIGH or LOW, the type of pulse to measure. Works on pulses from 2-3 microseconds to 3 minutes in length, but must be called at least a few dozen microseconds before the start o…

slight update to pulseIn() function documentation

Coding_Badly November 2, 2013, 1:58am 6

I don't know.

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