NRF52840 in sleep how to wakeup

[manobala12]

How to wakeup while in sleep state via uart

[Vidar Berg]

Hello,

Please include more details about your current setup and what you are trying to achieve. E.g. should the UART peripheral be disabled in sleep like described here: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/drivers/uart_nrf_sw_lpuart.html#low-power-uart-driver? What SDK? Sleep mode?

[manobala12]

Hi

I am using STM32H7 and i connect nrf52840 via uart connection and i tried to sleep ON  & OFF using trigger button in stm32 

* I sent data in stm32 via UART  1-> to start & 2-> stop

Is this is write way i am working with i cannot able to understand

uart_event_handle(app_uart_evt_t * p_event) // in this fun i used this logic 

{

     if(data_array[0] == '1')

    {

         ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);

     }

     else if(data_array[0] == '2')

     {

         sd_ble_gap_adv_stop(m_advertising.adv_handle);

     }

.....

}

[Vidar Berg]

I don't see where you are updating the 'data_array'. That should normally be done inside the uart_event_handle() if you are using the app uart libary. 

Like this: 

uart_event_handle(app_uart_evt_t * p_event) // in this fun i used this logic 
{
    if (p_event->evt_type == APP_UART_DATA_READY)
    {
        UNUSED_VARIABLE(app_uart_get(&data_array[0]));
        
        if(data_array[0] == '1')
        {
            ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
        }
        else if(data_array[0] == '2')
        {
            sd_ble_gap_adv_stop(m_advertising.adv_handle);
        }
    }

[manobala12]

Hi Vidar Berg

I tried lots of time but i am not able to ON and OFF 

Receive data via UART data_array[].It get's OFF but not getting ON i don't have Idea

void uart_event_handle(app_uart_evt_t * p_event)

{

static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];

static uint8_t index = 0;

uint32_t err_code;

/****************************************************************/

if(data_array[0] == '1')

{

     // ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);

     ble_advertising_restart_without_whitelist(&m_advertising);

}

else if(data_array[0] == '2')

{

     sleep_mode_enter();

}

/****************************************************************/

switch (p_event->evt_type)

{

case APP_UART_DATA_READY:

UNUSED_VARIABLE(app_uart_get(&data_array[index]));

index++;

if ((data_array[index - 1] == '\n') ||

(data_array[index - 1] == '\r') ||

(index >= m_ble_nus_max_data_len))

{

if (index > 1)

{

NRF_LOG_DEBUG("Ready to send data over BLE NUS");

NRF_LOG_HEXDUMP_DEBUG(data_array, index);

do

{

uint16_t length = (uint16_t)index;

err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);

if ((err_code != NRF_ERROR_INVALID_STATE) &&

(err_code != NRF_ERROR_RESOURCES) &&

(err_code != NRF_ERROR_NOT_FOUND))

{

APP_ERROR_CHECK(err_code);

}

} while (err_code == NRF_ERROR_RESOURCES);

}

index = 0;

}

break;

case APP_UART_COMMUNICATION_ERROR:

APP_ERROR_HANDLER(p_event->data.error_communication);

break;

case APP_UART_FIFO_ERROR:

APP_ERROR_HANDLER(p_event->data.error_code);

break;

default:

break;

}

}

[Vidar Berg]

The discussion continued here:  NFR52840 advertise problem