Intelligent phone charger with user defined cut-off

wvmarle:
For the how: see #7.

Yes, that's what I touched on in my original post. I am unfamiliar with how to implement which is why I started the thread.

I would also like to find someone versed in smart phone communication over USB so I can retrieve the charge level that way instead of pairing the charger with a specific phone. I'm sure it's doable since my car does it.

If it is an Android phone, ADB is a useful starting point

TolpuddleSartre:
If it is an Android phone, ADB is a useful starting point

Yep, I am lightly familiar with ADB. I imagine cars and things like that can detect OS type and support both which would be ideal.

What I really need help with is picking out the hardware I would need for such a project and some help with the wiring to cut off power while maintaining data connection to the device. I am a total n00b there.

A whole lotta wrong. If you put as much effort into learning about the imagined 'problem' as you are into a solution, you will see that there is no problem.

I mean, do you only charge your phone when it gets critically low, as some stupid superstition dictates in the same rationale?

INTP:
A whole lotta wrong. If you put as much effort into learning about the imagined 'problem' as you are into a solution, you will see that there is no problem.

You clearly don't practice that yourself as you haven't taken the time to learn about it so I am curious... Is there a point you were trying to make or are you just padding your posts count as well?

It literally couldn't be less relevant whether or not you think it's worth the trouble.

I think you may have more luck with Bluetooth to get the battery SOC. My car connects to my phone on Bluetooth and it shows a battery icon. Investigate what Bluetooth connection schemes send the battery.

Also look into a USB "Host Shield" for your Arduino.