You can subscribe to be notified of ESP events using this

In your initialise

	ESP_ERROR_CHECK( esp_event_loop_init(event_handler, NULL) );
Event handler fucntion

//***************************************
//***************************************
//********** ESP EVENT HANDLER **********
//***************************************
//***************************************
//Call this at startup:
//ESP_ERROR_CHECK( esp_event_loop_init(event_handler, NULL) );
static esp_err_t event_handler(void *ctx, system_event_t *event)
{
    switch(event->event_id)
    {
    case SYSTEM_EVENT_STA_START:
        //WiFi connected

        break;

    case SYSTEM_EVENT_STA_GOT_IP:
        //WiFi got IP

        break;

    case SYSTEM_EVENT_STA_DISCONNECTED:
        //WiFi lost connection
        
        break;

    default:
        break;
    }
    return ESP_OK;
}
/* AVAILABLE EVENTS:
    SYSTEM_EVENT_WIFI_READY = 0,           //< ESP32 WiFi ready
    SYSTEM_EVENT_SCAN_DONE,                //< ESP32 finish scanning AP
    SYSTEM_EVENT_STA_START,                //< ESP32 station start
    SYSTEM_EVENT_STA_STOP,                 //< ESP32 station stop
    SYSTEM_EVENT_STA_CONNECTED,            //< ESP32 station connected to AP
    SYSTEM_EVENT_STA_DISCONNECTED,         //< ESP32 station disconnected from AP
    SYSTEM_EVENT_STA_AUTHMODE_CHANGE,      //< the auth mode of AP connected by ESP32 station changed
    SYSTEM_EVENT_STA_GOT_IP,               //< ESP32 station got IP from connected AP
    SYSTEM_EVENT_STA_LOST_IP,              //< ESP32 station lost IP and the IP is reset to 0
    SYSTEM_EVENT_STA_WPS_ER_SUCCESS,       //< ESP32 station wps succeeds in enrollee mode
    SYSTEM_EVENT_STA_WPS_ER_FAILED,        //< ESP32 station wps fails in enrollee mode
    SYSTEM_EVENT_STA_WPS_ER_TIMEOUT,       //< ESP32 station wps timeout in enrollee mode
    SYSTEM_EVENT_STA_WPS_ER_PIN,           //< ESP32 station wps pin code in enrollee mode
    SYSTEM_EVENT_AP_START,                 //< ESP32 soft-AP start
    SYSTEM_EVENT_AP_STOP,                  //< ESP32 soft-AP stop
    SYSTEM_EVENT_AP_STACONNECTED,          //< a station connected to ESP32 soft-AP
    SYSTEM_EVENT_AP_STADISCONNECTED,       //< a station disconnected from ESP32 soft-AP
    SYSTEM_EVENT_AP_STAIPASSIGNED,         //< ESP32 soft-AP assign an IP to a connected station
    SYSTEM_EVENT_AP_PROBEREQRECVED,        //< Receive probe request packet in soft-AP interface
    SYSTEM_EVENT_GOT_IP6,                  //< ESP32 station or ap or ethernet interface v6IP addr is preferred
    SYSTEM_EVENT_ETH_START,                //< ESP32 ethernet start
    SYSTEM_EVENT_ETH_STOP,                 //< ESP32 ethernet stop
    SYSTEM_EVENT_ETH_CONNECTED,            //< ESP32 ethernet phy link up
    SYSTEM_EVENT_ETH_DISCONNECTED,         //< ESP32 ethernet phy link down
    SYSTEM_EVENT_ETH_GOT_IP,               //< ESP32 ethernet got IP from connected AP
*/

 

 

 

UK Electronic Designer
USEFUL?
We benefit hugely from resources on the web so we decided we should try and give back some of our knowledge and resources to the community by opening up many of our company’s internal notes and libraries through mini sites like this. We hope you find the site helpful.
Please feel free to comment if you can add help to this page or point out issues and solutions you have found, but please note that we do not provide support on this site. If you need help with a problem please use one of the many online forums.