attachInterrupt, can I attach more than one handler? The ideal way is check to get current handler attached, and then attachInterrupt to my own handler and at then end of my handler, I can call the original handler.

Can I attach more than on handler to a interupt pin?

Using Arduino Interfacing w/ Software on the Computer

ron_sutherland March 12, 2019, 4:14am 5

attachInterrupt takes a pointer to a function and saves it. It can then be used as a callback function.

If you give attachInterrupt a new pointer it will not keep the old one, there is room for just one pointer value per pin, so one callback function's address can be registered per pin.

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Can I attach more than on handler to a interupt pin?

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