random delay

[Ridhi]

I want to add a random delay in range 2000 to 3000 ms before my device perfrom any activity.

pls tell how can do this at earliest

usins some  timer or something else

[Ridhi]

Hakon i added:

1). defined insatnce:  

APP_TIMER_DEF(m_my_timer_instance);

2). created a single shot timer in timers_init():

err_code = app_timer_create(&m_my_timer_instance,
APP_TIMER_MODE_SINGLE_SHOT,
sensor_timer_handler);
APP_ERROR_CHECK(err_code);

3). now i am not getting how to use this shared by you:

uint16_t rand_value;
uint8_t bytes_available = 0;

(void)sd_rand_application_bytes_available_get(&bytes_available);
if (bytes_available >= sizeof(rand_value))
{
err_code = sd_rand_application_vector_get(&rand_value, sizeof(rand_value));
APP_ERROR_CHECK(err_code);
} else {
/* implement your error handling if no rand bytes available */
}

err_code = app_timer_start(m_my_timer_instance, APP_TIMER_TICKS((rand_value % 1000) + 2000), NULL);

as i dont know how to use it in handler, also i have to add this timer before timer used in line 357 of my code.

pls hlp

[Ridhi]

gentle reminder

[Ridhi]

Hakon pls assist at earliest

[Håkon Alseth]

Could you please explain what is the issue that you are seeing?

 

Kind regards,

Håkon

[Ridhi]

1). in line 158: i have added

APP_TIMER_DEF(m_my_timer_instance);

2). in line 573: i have added

err_code = app_timer_create(&m_my_timer_instance,
APP_TIMER_MODE_SINGLE_SHOT,
battery_level_meas_timeout_handler);
APP_ERROR_CHECK(err_code);

3). i aim to add a random delay before the repeated timer of line 374 starts.

as suggested by you: in line 357 i have added

uint16_t rand_value;
uint8_t bytes_available = 0;

(void)sd_rand_application_bytes_available_get(&bytes_available);
if (bytes_available >= sizeof(rand_value))
{
err_code = sd_rand_application_vector_get(&rand_value, sizeof(rand_value));
APP_ERROR_CHECK(err_code);
} else {
/* implement your error handling if no rand bytes available */
}

err_code = app_timer_start(m_my_timer_instance, APP_TIMER_TICKS((rand_value % 1000) + 2000), NULL);
 

4). i am getting error as shown in pic

5). i am not able to add the random delay