How to get parameter from app_uart_ble?

[Marcos Tadeo]

Hi

I am using nrf52840 and I want to use nrf_calendar example with app_ble_uart, 

I am traying to send parameter from nrf toolbox uart app mobile 

but I have no idea how to do that

I tried to manipulate this part code for to set parameter clock ":nrf_cal_set_time(year, month, day, hour, minute, second); " as nrf_calendar example, but I cant

static void nus_data_handler(ble_nus_evt_t * p_evt) {
	if (p_evt->type == BLE_NUS_EVT_RX_DATA) {
	
		for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++) {
			err_code = app_uart_put(p_evt->params.rx_data.p_data[i]);
		}
	}

any advice how to get parameter app_ble_uart?

.

.

.

.

.

best regards

I was using google translate :p

[Kazi Afroza Sultana]

Hello Marcos,

The calendar application gets the time over HW UART (https://github.com/NordicPlayground/nrf5-calendar-example/blob/master/main.c#L176-L181) . 

You can send the time over Nordic URT Service (NUS) in a format you need. Then you have to parse this on the receiving end, and pass the time to nrf_cal_set_time() https://github.com/NordicPlayground/nrf5-calendar-example/blob/master/nrf_calendar.h#L36 . For example, if you want to send time over NUS in this format yyyy,mm,dd,hh,mm,ss.

Afterwards, you can use a parsing function to get the time, for example strtol () (this function converts string to long integer) or something like that. 

or like this- 

The important thing is that the position of each time parameter is static, so format is important. 

Hope it helps. 

Thanks. 

Best Regards,

Kazi Afroza Sultana

[Marcos Tadeo]

Hi Kazi

thanks for you reply,

I have a doubt

Can I change  char timestring[]= "08,54,00,27,00,2022";  to char timestring[]= Varible char;?

variable char  = NUS data :

this part handling the data recived over NUS BLE

I am traying to save data in a variable  get_time = p_evt->params.rx_data.p_data;

declaration

I can to print p_evt->params.rx_data.p_data and length also .

printf("\r%s - %d\r\n",p_evt->params.rx_data.p_data,p_evt->params.rx_data.length);

and using get_time I am traying to do this

  

void reloj_init()
{
	nrf_cal_init();
	uint32_t year, month, day, hour, minute, second;
	
	char timestring[]= get_time;	
    
    hour   =atoi(timestring);    // 1 - 24
    minute =atoi(timestring+3);  // 0 - 59
    second =atoi(timestring+6);  // 0 - 59
		day    =atoi(timestring+9);	 // 1 - 31
		month  =atoi(timestring+12); // 0 - 11
		year   =atoi(timestring+15); // 1900 
		
		nrf_cal_set_time(year, month, day, hour, minute, second);
}

because I am thinking that the variable get_time = "09,15,00,27,00,2022" ,the data I sent over NUS.

I guess.. xd

what is wrong?

I am beginner  sorry , I have a lot doubts

best regards

[Kazi Afroza Sultana]

Hi,

You may try to create a char array and use the memcpy () function

(For example // Copies "numBytes" bytes from address "from" to address "to"
void * memcpy(void *to, const void *from, size_t numBytes);)

to copy the NUS string to the array. 

Best Regards,

Kazi Afroza Sultana

[Marcos Tadeo]

HI

yes, you right, I created a char array into nus_data_handler "arr[i]"

static void nus_data_handler(ble_nus_evt_t * p_evt)// esta funcion recibe lo que se haya mandado por bluetooth
{
    
		
    if (p_evt->type == BLE_NUS_EVT_RX_DATA)
    {
        uint32_t err_code;
        
        for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++)
        {
            do
							{   
                err_code = app_uart_put(p_evt->params.rx_data.p_data[i]);
		---->   arr[i] = p_evt->params.rx_data.p_data[i];

and I used atoi like your example 

void data_update()
{
	uint32_t year, month, day, hour, minute, second;
	
		hour   =atoi(arr+2);    // 1 - 24
        minute =atoi(arr+5);  // 0 - 59
        second =atoi(arr+8);  // 0 - 59
		day    =atoi(arr+11);	 // 1 - 31
		month  =atoi(arr+14); // 0 - 11
		year   =atoi(arr+17); // 1900 
		
	  nrf_cal_set_time(year, month, day, hour, minute, second);	
		
	  memset(arr,0,26);

}

now its works , i can to change the time over NUS

thank you kazi

best regards