I wanted to use my old Amazon Fire HD 8 tablet as a smart home center and hang it on the wall accordingly. Unfortunately I couldn't find a suitable holder for it.

This one is fairly easy to print and then attach to the wall with nails and some double sided tape for security. The tablet is pushed in upside down and there is space for a micro-USB cable with a 90° connection in the lower recess. I chose the following model: https://www.amazon.de/dp/B0B6Y865B6?psc=1&ref=ppx_yo2ov_dt_b_product_details
I also designed a lock that keeps the cable in place.
The tablet is then connected and charged after being pushed in.