最低耗能設定

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在某些特殊應用情況，尤其使用電池供電時，需要儘可能關閉用不到的耗電服務。

Turn OFF USB chip

echo '1-1' |sudo tee /sys/bus/usb/drivers/usb/unbind

Turn ON USB chip

echo '1-1' |sudo tee /sys/bus/usb/drivers/usb/bind

Total = 7hrs 21mins

sudo /opt/vc/bin/tvservice -o

Turn ON HDMI output

sudo /opt/vc/bin/tvservice -p

Total = 4hrs 11mins

/boot/config.txt

arm_freq_min=250
core_freq_min=100
sdram_freq_min=150
over_voltage_min=0

/boot/config.txt：

dtoverlay=pi3-disable-wifi
 
dtoverlay=pi3-disable-bt

/boot/config.txt：

dtparam=act_led_trigger=none
 
dtparam=act_led_activelow=on

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