The Mbed, which is the Arduino' "professional" brother, does support event driven sleep using callbacks: https://developer.mbed.org/blog/entry/Using-the-new-mb

The Mbed, which is the Arduino' "professional" brother, does support event driven sleep using callbacks: https://developer.mbed.org/blog/entry/Using-the-new-mbed-power-management-API/ https://developer.mbed.org/blog/entry/Using-the-new-mbed-pow... Since this is a part of the new mbed-2.0 os , i think there are already 5 micro controllers that support it.