Openwrt WiFi transparent bridge

Hi all. How to configure Wifi transparent bridge in openwrt. im using

You Carambola act as Wifi Access Point or Client?

Actualy i have 2 carambola devices and 1st will be Access point and second will be client

WDS, if your hardware and its drivers support it, is perhaps the easiest solution if VLANs aren't involved, or if only a couple (one VLAN per SSID).