Hello everyone I am using a Ultrasonic Sensor (Complete Guide for Ultrasonic Sensor HC-SR04 with Arduino | Random Nerd Tutorials).
I am just curious if say there is no activity for 20 minutes I can put the arduino to sleep and when the UltraSonic sensor picks up activity it awakes the Arduino back up and runs the code.
I'm trying to really save a lot of battery power without using a cord.
Thank you
teckk9:
Hello everyone I am using a Ultrasonic Sensor (Complete Guide for Ultrasonic Sensor HC-SR04 with Arduino | Random Nerd Tutorials).I am just curious if say there is no activity for 20 minutes I can put the arduino to sleep and when the UltraSonic sensor picks up activity it awakes the Arduino back up and runs the code.
I'm trying to really save a lot of battery power without using a cord.
Thank you
If the Arduino is sleeping, how can it tell the sensor to emit a pulse and then wait to receive the echo?
Paul
That sensor won't do any measurement without the Arduino telling it to do so. It definitely won't be able to wake up the Arduino as won't pick up activity without the Arduino running.
But depending on your scenario you might put the Arduino to sleep for a few seconds, wake up, make a measurement and go to sleep for a few seconds again. If a measurement every few seconds is enough for the job you might save a lot of energy.
The only way is wake up the Arduino, for example every 30 sec and the poll sensor.
Maybe this can help out. Using ATTINY: My Ultra Low Power Wireless Trigger Sensor: Overview (Part 1) - YouTube