Arduino sleepmode?

What are some of the effective ways to remotely wake up the device from an interruption? Maybe from a push of a button or a sensor.

What are some of the effective ways to remotely wake up the device from an interruption?

Should that sentence read “wake up the device by an interruption”? In the above words it doesn’t make sense.

You wake up an Arduino from sleep by an interrupt. Which interrupts work at which sleep level is defined in the datasheet. This is possible with a button of course, but many sensors don’t have such a feature they depend on being polled to deliver data and don’t get active by themselves.

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