nRF UART app Send

RE: nRF UART app Send

FormerMember — Sat, 21 Jan 2017 01:01:11 GMT

Solved this problem myself. Here is the solution, hope can help others.

static void nus_data_handler(ble_nus_t * p_nus, uint8_t * p_data, uint16_t length)
{
	memset(&send_value,0x00,length);
    for (uint32_t i = 0; i < length; i++)
    {
        while (app_uart_put(p_data[i]) != NRF_SUCCESS);
// Read what the "data request" is send from the smart phone. Refer to "spi_event_handler()"
	    send_value = send_value * 10 + (p_data[i] - '0');
    }
    while (app_uart_put('\r') != NRF_SUCCESS);
    while (app_uart_put('\n') != NRF_SUCCESS);
// print what send_value is		
		printf("send_value: %d\n",send_value);			
}

by @faweiz

RE: nRF UART app Send

Sigurd — Fri, 20 Jan 2017 17:29:06 GMT

Could be a bug with the app. You should use the nRF Toolbox app and use the uart function there. The old UART 2.0 is deprecated.

RE: nRF UART app Send

FormerMember — Fri, 20 Jan 2017 16:24:54 GMT

I've already include it, if not include it won't compile. Any solution?

RE: nRF UART app Send

Sigurd — Fri, 20 Jan 2017 15:44:18 GMT

Did you remember to add #include "math.h"? And you have doubled checked that the two functions are identical?

RE: nRF UART app Send

FormerMember — Fri, 20 Jan 2017 15:33:42 GMT

@Sigurd, I tried your suggest and follow that page code. When I send the 1 from phone to nRF52 I can received number "1", but when I send 2 from phone to nRF52 it received "3" and send 3 received "8". Any idea on why does thing happen? devzone.nordicsemi.com/.../

RE: nRF UART app Send

Roger Clark — Fri, 20 Jan 2017 08:23:38 GMT

The NUS is character not integer based.

If you want to send numbers not text, you probably need to create a custom service to suit your precise needs

RE: nRF UART app Send

Sigurd — Fri, 20 Jan 2017 08:23:05 GMT

Hi wecare,

You are only storing the last part of the number that was sent. E.g. if you send 42, only the number 2 is stored in send_value. Take a look at this answer for a method on how to store a number sent from the phone by modifying the nus_data_handler().

Note: The method only works with positive numbers, and you need to make some changes for it to work with negative numbers.

RE: nRF UART app Send

FormerMember — Fri, 20 Jan 2017 07:10:36 GMT

the data send from phone to nRF52 is not display in "int" type,

    static void nus_data_handler(ble_nus_t * p_nus, uint8_t * p_data, uint16_t length)
    {
    	int send_value;
        for (uint32_t i = 0; i < length; i++)
        {
            while (app_uart_put(p_data[i]) != NRF_SUCCESS);
    	send_value = ((p_data[i]-'0'));
        }
        while (app_uart_put('\r') != NRF_SUCCESS);
        while (app_uart_put('\n') != NRF_SUCCESS);
        printf("send_value: %d\n",send_value);
    }

The problem is when I enter number from 0 to 9 it works fine, but after entered number above 10 it shows the 0-9 again. any idea on how to let it display as integer type number?

Thanks

RE: nRF UART app Send

Roger Clark — Fri, 20 Jan 2017 04:00:40 GMT

I think what you are looking for is the callback function nus_data_handler() in main.c

The handler is passed to the uart service during initialisation, and the on_write() function in the uart service calls the function pointer (which points to the callback function in main)

If you are not seeing any output on your hardware (UART) pins, then you don't have the TX and RX pins configured correctly for the board you are using.