I'm trying to make a fully working chronometer with the addition of using a self made library. I made a fully working code before starting to split my functions into a library, after having finished that I tried to compile my code again after a quick restart of the Arduino IDE. the error log state…

Chronometer

BulldogLowell November 7, 2017, 5:21pm 6

or add tabs in the IDE and past your library's .h and .cpp into two new tabs like this:

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