ble_app_uart low power

Question

Hi, 
 I am developing a product with battery power. To preserve the battery life, this product needs to work in low power mode. 
 My Environment is a nRF52832, SDK15.2 & custom board 
 I use ble_app_uart example 
 Current consumption is 5mA . 
 Please advise me to enter low power mode. 
 ========================================================== 
 #define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms; this value corresponds to 40 ms). */ 
 #define APP_ADV_DURATION 0 /**< The advertising time-out (in units of seconds). When set to 0, we will never time out. */ 
 init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE; 
 
 int main(void)
{
 bool erase_bonds;
	ret_code_t err_code;
	
 // Initialize.
 // uart_init();
//	gpio_led_init();	
 log_init();
 timers_init();
	app_timers_init();	

 power_management_init();

 ble_stack_init();
 gap_params_init();
 gatt_init();
 services_init();
 advertising_init();
 conn_params_init();
	
	err_code = sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);
	APP_ERROR_CHECK(err_code);
	
 // Start execution.
 NRF_LOG_INFO("Debug logging for UART over RTT started.");
 advertising_start();

	app_timers_start();

 // Enter main loop.
 for (;;)
 {
 idle_state_handle();
 }
} 
 
 In SDK_CONFIG.h 
 #define NRF_LOG_ENABLED 0 
 #define GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS 5 
 Thanks. Regards. Alex

Hadi Deknache · Accepted Answer

Hi Alex, 
 Do you put the device cpu in sleep mode in the idle_state_handle? 
 E.g. do you call __WFE or sd_app_evt_wait()? 
 This post might be of interest maybe: 
 https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/optimizing-power-on-nrf52-designs 
 /Hadi

ble_app_uart low power

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