Is it possible to use an ultrasonic sensor to wake up an Arduino which is in deep sleep when an object is detected within a few cm and then do stuff?
Electronic – arduino – Ultrasonic sensor(ping) and deep sleep Arduino
arduinointerruptssensorsleepultrasound
Best Answer
For a truly low-power, Arduino-based solution at least the following is needed:
A) HARDWARE SIDE:
B) SOFTWARE SIDE:
Here you can find really good, practical information on the way to go low power. For a more thorough guide, read this as well.