How to transfer data through UART

[aworks]

Hi,

I used nrf51822- EK board.

GATT - s110 6.2.1 softdevice

I transfer data through UART for nrf51822-EK(PCA10001).

But this time. I used nrf51822 smart beacon kit(PCA20006).

PCA20006 is received data through UART.

But PCA20006 is not transfer data through UART.

PCA20006 UART

rx ------------------------- tx (OK)

tx ------------------------- rx (XX)<-- this problem...

I guess NRF_UART0->EVENTS_TXDRDY not set 1.

So. How to solve this problem ?

[aworks]

this code simple_uart.c