how to receive data with ble_app_multilink_central ?

Question

// code to receive data
void getData(uint8_t* recData,uint8_t* saveData, uint8_t index)
	{
 saveData[index] = recData[index];
 
}

void nus_data_handler(ble_nus_t *p_nus, uint8_t * p_data, uint16_t length) 
{
for (uint32_t i = 0; i < length; i++)
{
getData(p_data, bleRecData, i);
	NRF_LOG_INFO("Receive
");

 while(app_uart_put(p_data[i]) != NRF_SUCCESS);
}
while(app_uart_put('
') != NRF_SUCCESS); 
}



// initialization of services
void services_init(void)
{
 uint32_t err_code;
 ble_nus_init_t nus_init;

 memset(&nus_init, 0, sizeof(nus_init)); 
	
 nus_init.data_handler = nus_data_handler;

 err_code = ble_nus_init(&m_nus,&nus_init);
	
 APP_ERROR_CHECK(err_code);
 
 
//int main
int main(void)
{
 ret_code_t err_code;

 err_code = NRF_LOG_INIT(NULL);
 APP_ERROR_CHECK(err_code);
 NRF_LOG_INFO(" Multilink Example
");
	
 leds_init();
 APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, NULL);
 buttons_init();
 ble_stack_init();
 services_init();
 db_discovery_init();
 lbs_c_init();
 uart_init();
 
 // Start scanning for peripherals and initiate connection to devices which advertise.
 scan_start();
 // Turn on the LED to signal scanning.
 bsp_board_led_on(CENTRAL_SCANNING_LED);

 for (;;)
 {
 if (NRF_LOG_PROCESS() == false)
 {
 // Wait for BLE events.
 power_manage();
 }
 }
}

 
 
 

	
	
	
}
 
 I have a problem that bothers me for days. 
 I try to run this code on nrf51 to receive data from anathor nrf51 
 please i need help for my final project