bash script for dozing android device

doze.sh

#!/bin/bash

adb shell dumpsys deviceidle |grep "mScreenOn=true" > /dev/null
if  [ "$?" -eq "0" ]; then
	adb shell input keyevent POWER
	sleep 2
fi

adb shell dumpsys battery |grep "USB powered: true" > /dev/null
if  [ "$?" -eq "0" ]; then
	adb shell dumpsys battery unplug
fi

stat=$(adb shell dumpsys deviceidle |grep "mState=IDLE")
until [[ $stat == *"IDLE"* && $stat != *"IDLE_"* ]]; do
	stat=$(adb shell dumpsys deviceidle step)
	echo -e $stat
done

echo "Welcome to dreamland!"

Or use adb shell dumpsys deviceidle force-idle