Tl-wr902ac add hotspot to a wired network

I've a local network with fixed IP and only 2 systems.
A computer + an electronic board.
Actually the system works correclty in wired version but now I want to put the electronic board in WIFI
I've bought a tl-wr902ac router to connect it to the electronic board.
I don't really understand wich mode I've to use in the router configuration : Access Point ?
And I want to connect my computer to this Access point to connect to my electronic board.
On my network the computer is and the board