Power savings

Here are some of the ways to save power.

Turn off hdmi

edit:

sudo nano /etc/rc.local

and add these lines BEFORE the exit 0:

# Disable HDMI
/usr/bin/tvservice -o

Turn off the camera LED

The camera LED is quite bright and in low light can cause reflections as well as making the pi ‘obvious’ at night.

edit:

sudo nano /boot/config.txt

and add the following at the end:

# Disable camera LED
disable_camera_led=1

Turn off activity LED -Pi ZERO ONLY!

LEDs on other versions require different settings. ‘See here <https://www.jeffgeerling.com/blogs/jeff-geerling/controlling-pwr-act-leds-raspberry-pi>’_.

edit:

sudo nano /boot/config.txt

and add the following at the end:

# Disable the ACT LED on the Pi Zero.
dtparam=act_led_trigger=none
dtparam=act_led_activelow=on

Convert USB port to USB1.1

DO NOT DO THIS if you want to use a LAN connection or USB connected storage (usb memory stick or usb conencted disc drive.

It is no problem for the wifi as that does not use the usb interface

edit:

sudo nano /boot/cmdline.txt

and add the line:

dwc_otg.speed=1