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.

[RK]

This kind of question seems to get asked more often than I could believe possible.

The number has been sent as a 16 bit number. It's little endian so the first byte is the lower 8 bits, the second the higher 8 bits, so the number received is ... 0x0017

which is 23 (16 + 7 == 23)

Whatever you have on the other side just needs to convert that. If you want to send it as a string instead, convert it to a string on the client and send that instead.

[JoanaBabo]

The temperature appers in hexadecimal, 23=17 in hexadecimal. I tried to send the temperature in a string and the result it's the same. I tried to change the type of variable but i can't because the function that gives me temperature uses that type and to change it i would have to change a lot of librarys and gives me a lot of errors. I can't neather pass from hexadecimal to int on the side of central because the value it's only in one bit. Can anyone help??

[Hrushi]

Hi JoanaBabo,

Which version of SDK you are using?

[Joakim Jakobsen]

From the original question:

"I'm using two nrf52, pca10040, s132 and i have SDK 12.2.0."