Sleep in connected mode

RE: Sleep in connected mode

Stefan Birnir Sverrisson — Mon, 18 Apr 2016 17:01:22 GMT

Hi Reshmi

There are mainly two low power modes

System On, low power mode (CPU disabled, all nRF5x peripherals enabled)
System Off mode, (CPU disabled, peripherals disabled)

Most or all examples in the SDK5 SDK 11.0.0 put the nRF5x device periodically into low power mode when connected with a peer device.

Recommended reading on how the low power modes work is given in the nRF51 Series reference manual and in the nRF52832 PS. There is also info in the nRF51 current consumption guide, chapter "Low power mode with BLE softdevice"

RE: Sleep in connected mode

Reshmi Marimganti — Wed, 13 Apr 2016 05:24:31 GMT

I have added the sleep code inside BLE_GAP_EVENT_CONNECTED

switch (p_ble_evt->header.evt_id)    
{    
    case BLE_GAP_EVT_CONNECTED:    
        err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);    
        APP_ERROR_CHECK(err_code);    
        
        m_advertising_mode = BLE_NO_ADV;   
        m_conn_handle      = p_ble_evt->evt.gap_evt.conn_handle;    
			
	nrf_delay_ms(2000);   
		      
uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE);
APP_ERROR_CHECK(err_code);

// Prepare wakeup buttons.    
err_code = bsp_btn_ble_sleep_mode_prepare();    
APP_ERROR_CHECK(err_code);      

// Go to system-off mode (this function will not return; wakeup will cause a reset).    
err_code = sd_power_system_off();    
APP_ERROR_CHECK(err_code);   
	       
 break;

RE: Sleep in connected mode

ToTo — Tue, 12 Apr 2016 17:05:16 GMT

Where do you put the sleep mode function?

It should not disconnect !! Are you sure that it return NRF_SUCCESS after you excute it ? Maybe you use the fuction that needs sofdevice activation but you didn't enable it before using that function?