cc2531 router boxes

I designed some boxes to enclose a *cc2531* board (antenna model) along with Hi-Link 5V ac/dc (or similar derivatives). I made no hole for input 220V~ electric wires, so everyone can make a hole matching its own wire diameter.

## Boxes
### v3.3
It is the biggest one (printed in white in the pictures), it can be _water-resistant_ adding some water-proof material between the box and the cap (see the black shape in the pictures, in my installation I used a water-proof foam sheet).

### v4.0
It is the smallest one (printed in brown-wood in the pictures), the inner space is just enough for cc2531, ac/dc plus support, so it's hard to mount all together, this is why I enlarge it a bit toward v4.1

### v4.1
It is bigger than v4.0 and is the one I currently use for inside installation.

## Installation
To mount all together you need:
- [cc2531 board](https://it.aliexpress.com/item/32852226435.html) (the antenna version)
- Hi-Link HLK-PM01 5V ac/dc (like [this](https://it.aliexpr