Android 4.1.2 + Debian kst - Watch battery voltage
I wanted a way to monitor battery voltage on a rooted Android 4.1.2 smartphone (Samsung Galaxy S3 Mini) from a Debian 8 desktop computer. This is one way to do it: On Android: Install SSHDroid SSH server: https://play.google.com/store/apps/details?id=berserker.android.apps.sshdroid&hl=en)and&rdid=berserker.android.apps.sshdroid (I also tried SSH Server, but this one refused to run commands, which is needed.) Start the server, it should share root access directly. On Debian: Install sshpass and kst: apt-get install sshpass kst (sshpass is used to skip entering passwords and kst is a graph viewer amongst other things to display data.) Create the following file on the desktop, save it as "fetcher" or something else. #!/bin/bash # enter the ip or hostname of your phone here PHONE="<fill-ip-to-phone-from-SSHDroid-here>" while : do # fetch data from source V=$(sshpass -p "admin" ssh -q -l root -o StrictHostKeyChecking=no $PHONE "cat /sys/class/power_supply/battery/voltage_now") C=$(sshpass -p "admin" ssh -q -l root -o StrictHostKeyChecking=no $PHONE "cat /sys/class/power_supply/battery/current_now") # voltage is in uV, divide it to get mV echo $(($V / 1000)) $C >> batterydata # sleep for a while sleep 5 done Run the file in a terminal standing in the desktop folder: bash ./fetcher (Cancel with Ctrl+C / Ctrl+M / Ctrl+Z for the univinted.) Note: the location of battery data differ based on makers and models, so the sys-path above may not match your phone. Login using standard SSH and have a look for yourself if it doesn't work. If everything worked, then you should have a new file named batterydata with the voltage. Open Kst and go to Tools -> Data wizard. Select the batterydata file and go Next.
This is a personal note. Last updated: 2017-08-11 22:14:37.