Reducing Energy Consumption on the Raspberry Pi Zero
These instructions show how you can reduce the power consumption of your Raspberry Pi 3.
Disable the Bluetooth and WiFi
Disabling the WiFi and Bluetooth seems to save about 300mA. To do this, add the following to /boot/config.txt:
If you don't need the screen, you can save 25mA by disabling HDMI. Run:
You can put this in /etc/rc.local to make it permanent
Disable Activity LEDs
To disable the activity LEDs permanently, saving about 5mA, add the following to /boot/config.txt:
# Disable the ACT LED. dtparam=act_led_trigger=none dtparam=act_led_activelow=off
I have found that you can temporarily turn on or off the activity and the power led using the following commands.
Use echo 1 to turn off the leds
echo 1 | sudo tee /sys/class/leds/led0/brightness echo 1 | sudo tee /sys/class/leds/led1/brightness
You can turn them back on by echo'ing '
echo 0 | sudo tee /sys/class/leds/led0/brightness echo 0 | sudo tee /sys/class/leds/led1/brightness
Remove unnecessary Applications or devices
Physically, remove anything unnecessary, screen, usb device Ethernet.
Remove any unnecessary software in particular, anything that is using substantial Time+ when you run a:
You can temporarily kill any processes with a:
sudo kill -9 [process name]
But it may be better to permanently remove them with a:
sudo apt remove [package name]