Android Remote Power Monitor

The power profiling is necessary to make  estimation about charging and discharging profile. There few ways to get a accurate measurement. I know two methods to do it,

1) Directly measure battery voltage and current using a very small (10-30mohm) sense resistor.

2) Directly measure battery voltage and current from charging IC using I2C interface.

3) Reading battery voltage and current from android

Method 1 is the most reliable and accurate way, however requires some hardware modification. Method 2 is time consuming and limited by the manufacturer support. Most of the battery charger IC support  I2C interface and has user access to the necessary registers. You need to go through in the datasheet to find the necessary registers. This might take sometime to write a workable script. 

Method 3 is a quick and easiest way to make a Android power profile. However, I am not sure how accurate it is. Android system has a power_supply directory where it store all the power information. I wrote a small batch script to read those android files and redirect them to a text file. During discharging, ADB using USB will not work as the same usb cable charge the unit. I use adb over tcp to over come this problem. I also read CPU temperature in this script. Here is the code,

  @echo off set adbdevice= echo If only one device is connected press Enter. echo For TCP adb enter ip and port (-s xxx.xxx.xxx.xxx:xxxx) set /p adbdevice=Device id (Enter -s space before the id): echo Connecting with : %adbdevice% set /p filename=Enter a file name : echo %time% Battery status > C:\Users\xxx\Desktop\Test\batt_status_%filename%.txt adb %adbdevice% shell cat /sys/class/power_supply/battery/uevent >> C:\Users\xxx\Desktop\Test\batt_status_%filename%.txt for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/power_supply/battery/voltage_now') do set voltage=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/power_supply/battery/current_now') do set current=%%a echo %time% Voltage : %voltage% , Current : %current% > C:\Users\xxx\Desktop\Test\batt_status_%filename%_VC.txt for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone0/temp') do set zone0=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone1/temp') do set zone1=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone2/temp') do set zone2=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone3/temp') do set zone3=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone4/temp') do set zone4=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone5/temp') do set zone5=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone6/temp') do set zone6=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone7/temp') do set zone7=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone8/temp') do set zone8=%%a echo %time% thermal_zone0: %zone0% thermal_zone1: %zone1% thermal_zone2: %zone2% thermal_zone3: %zone3% thermal_zone4: %zone4% thermal_zone5: %zone5% thermal_zone6: %zone6% thermal_zone7: %zone7% thermal_zone8: %zone8%> C:\Users\xxx\Desktop\Test\CPU_TEMP_%filename%.txt set loopcount=8000 :loop echo %loopcount% echo %time% Battery status >> C:\Users\xxx\Desktop\Test\batt_status_%filename%.txt adb %adbdevice% shell cat /sys/class/power_supply/battery/uevent >> C:\Users\xxx\Desktop\Test\batt_status_%filename%.txt for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/power_supply/battery/voltage_now') do set voltage=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/power_supply/battery/current_now') do set current=%%a echo %time% Voltage : %voltage% , Current : %current% >> C:\Users\xxx\Desktop\Test\batt_status_%filename%_VC.txt for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone0/temp') do set zone0=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone1/temp') do set zone1=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone2/temp') do set zone2=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone3/temp') do set zone3=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone4/temp') do set zone4=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone5/temp') do set zone5=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone6/temp') do set zone6=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone7/temp') do set zone7=%%a for /F "delims=" %%a in ('adb %adbdevice% shell cat /sys/class/thermal/thermal_zone8/temp') do set zone8=%%a echo %time% thermal_zone0: %zone0% thermal_zone1: %zone1% thermal_zone2: %zone2% thermal_zone3: %zone3% thermal_zone4: %zone4% thermal_zone5: %zone5% thermal_zone6: %zone6% thermal_zone7: %zone7% thermal_zone8: %zone8% >> C:\Users\xxx\Desktop\Test\CPU_TEMP_%filename%.txt set /a loopcount=loopcount-1 TIMEOUT 5 if %loopcount%==0 goto exitloop goto loop :exitloop