hardware

Hello everybody, I have to buy a tablet for a research project. During the project I have to collect sensor and user inputs of the tablet (The goal is to predict the attention level of the user with machine learning). I'm thinking about the following sensors / specifications the tablet should...

I'm hoping someone can assist determining whether I've destroyed the OS and even damaged recovery, or if there's something simple in recovery I'm forgetting to do. Some months ago, I bricked a Lenovo A2109 tablet. I was tired and frustraited and managed to screw things up pretty good. I boxed...