nRF Uart v2.0 not Receiving

Question

I am using the eval board, sdk v5.2.0, s110 v5.0 and a galaxy nexus with the UART Nordic app. I have not been able to receive any data on the android end. After 
 void nus_data_handler(ble_nus_t * p_nus, uint8_t * p_data, uint16_t length)
 
 is called i turn toggle an led. I can verifty that when i type something in my android device that it receives the message because the led will toggle. However i never get any messages back. 
 Much Thanks, 
 Nick

Vidar Berg · Accepted Answer

Hi, are you using a terminal on your computer to pick up the data received by your board? There is no automatic echoing implemented in ble_app_uart, so it does in other words not respond to received strings via ble. There is a startup message on the board, but it is only sent over the UART when the application starts. 
 Assuming that you didn't use a terminal. What you need to do is opening the corresponding com port in a terminal with 38400 baud rate and 1 stop bit. 
 Best regards, 
 Vidar 
 Edit:
Code snippet to echo rx data to tx 
 void nus_data_handler(ble_nus_t * p_nus, uint8_t * p_data, uint16_t length)
 { 
 uint32_t err_code;
 /*Echo incoming data*/
 err_code = ble_nus_send_string(&m_nus, p_data, length);

 //err_code = ble_nus_send_string(&m_nus, p_data, length);
 
 if (err_code != NRF_ERROR_INVALID_STATE)
 {
 APP_ERROR_CHECK(err_code);
 }
 }

nRF Uart v2.0 not Receiving

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