Sending number over ble with ble_nus_string_send

[JoanaBabo]

Hi! Can anyone help me send values of temperature over ble? I tried and it appears like this,Capturar.PNG.

I'm using the code on the examples, ble_peripheral\ble_app_uart and ble_central\ble_app_uart, to comunicate over ble and changed this function on ble_peripheral to send values of temperature when i request in central:

static void nus_data_handler(ble_nus_t * p_nus, uint8_t * p_data, uint16_t length){		
  if(p_data[0]=='?'){	

	uint8_t temp;
	uint32_t err_code;

    err_code = sd_temp_get(&temp);
	APP_ERROR_CHECK(err_code);
														
    temp = (temp / 4);
	printf("Temperature: %d \n", temp);
																											
	ble_nus_string_send(&m_nus, &temp, 2);
	}													
}									

The temperature is correct when i print on the side of the peripheral but when i send it over ble to central it appears in hexadecimal i think, as you can see on the image above. I'm using two nrf52, pca10040, s132 and i have SDK 12.2.0.

Thanks.

[Joakim Jakobsen]

Hi JoanaBabo!

If you want to send the temperature value as a string instead,
you could try writing your code something like this:

static void nus_data_handler(ble_nus_t * p_nus, uint8_t * p_data, uint16_t length)  
{     
  if(p_data[0]=='?')
  {   

  int32_t temp;
  uint8_t data[20]; 
  uint32_t err_code;

  err_code = sd_temp_get(&temp);
  APP_ERROR_CHECK(err_code);

  temp = (temp / 4);
  sprintf((char *)data, "Temperature: %d", temp); 
  printf("Temperature: %d \n", temp);

  ble_nus_string_send(&m_nus, data, sizeof(data));
  }                                                   
}

Let me know if that doesn't work out for you.

Best regards,
Joakim.

[JoanaBabo]

It Worked!!!! Thank you very much!!!

[Joakim Jakobsen]

I'm glad! Happy to help. :)

[Luke Galea]

Hi, the ble_nus_string_send does not seem to be available any more in SDK16. Have you got any recommendations for sending a string using the BLE NUS UART Service?

[Joakim Jakobsen]

Hi. 

If you take a look at the documentation: 
Nordic UART Service 

You can see that the function is changed. You can now use ble_nus_data_send() 

Br, 
Joakim