Android Tablet with Auto Power-On/Off?

[Norseman12]

I'm looking for an Android-based tablet that I can modify to turn on/off when it receives power (like when I start my rig). I'm not aware of any that have a factory option to do this, even though it seems like a pretty straightforward and extremely useful feature. I've tried using the "fastboot oem off-mode-charge 0" command to turn on this feature on both a Samsung and a Lenovo, but I can't get it to work. All the info I've found seems to be outdated, for different model tablets, or for different software versions. I heard its actually impossible to do this on a Samsung, but I had heard that it was possible on a Lenovo. So, I bought a Lenovo M9 and still can't figure it out.

If there are any Android experts out there, please let me know!

 

[IoN6]

You rooted it before trying? I vaguely recall fastboot for flashing stuff

 

[DaveInDenver]

Android can do this but you'll probably need to root the device and hack the OS.

Under the skin it's just Linux. Once you do a root there's solutions to control the power on and off however you want. The phone may not have all the hooks from a hardware standpoint to do complex tasks but a lot of the "smart" devices you encounter are variations of this theme, running sometimes Android even but almost definitely some sort of embedded or/and lightweight Linux...

https://en.wikipedia.org/wiki/Linux_on_embedded_systems

https://en.wikipedia.org/wiki/Android_(operating_system)

In this case the method the phone uses to show you a battery symbol when you plug it in but it's turned off is such a task I believe of the bootloader you can exploit to run scripts that do almost anything you want.

https://stackoverflow.com/questions/4169387/how-to-make-android-device-boot-when-power-is-plugged-in

https://xdaforums.com/t/q-power-on-when-plugged-in-boot-when-docked.1187631/#post-16483188

https://xdaforums.com/t/auto-power-off-while-no-charging.4541021/

 

[Norseman12]

You rooted it before trying? I vaguely recall fastboot for flashing stuff

You rooted it before trying? I vaguely recall fastboot for flashing stuff

I didn't try rooting yet. Seemed like some people were able to get it done through fastboot.

 

[IoN6]

I am 98.7% sure it needs to be rooted to do those types of commands.