The psu is just a wifi to serial converter.

here is a top of board view 

the esp32 is on the bottom of the board,like this

I created this board to allow remote wifi access to a Vichy 8145 bench DMM, but it seems to have other uses. The PCB has provision for a power supply switcher, which isn't used  in this specific application. There is a 3v3 to 5V level shifter,  and the esp32 module does wifi to serial and maybe a bit of protocol conversion.  

Really it just makes this DPM8624 power supply module more accessible. The DPM8624  seems pretty nice for the price. Works nicely in this particular application for me. Just watch out for the on/off switch on the bottom when you mount it this way. Easy to turn off by mistake, and that takes some head scratching when you didn't even notice the switch.