What are the WL_RS232_RX and WL_RS232_TX pins used for?

This pins are used for a WLAN test mode interface. Both pins are 1.8V logic level UART pins. These pins should be brought out to a header on the host PCB. The WLAN test interface can be used to place the module into constant packet transmit and constant packet receive modes. These modes can be useful for antenna and sensitivity testing.