Wifi event problem when running WifiClientEvents example code

tainnt29
Posts: 1
Joined: Tue Oct 08, 2019 7:26 am

Wifi event problem when running WifiClientEvents example code

Postby tainnt29 » Tue Oct 08, 2019 8:16 am

Hi everyone, I am working with ESP32, now I try to use the WifiClientEvents example of the Wifi library on Arduino IDE to test the event when esp lost the connection to the wifi network.
I have tested by creating wifi with my phone and then getting esp to connect to the wifi I've just created. And I will try to turn off wifi broadcasting on the phone to check whether esp jumped into the event SYSTEM_EVENT_STA_DISCONNECTED or not.
But when I tried it, when I stopped playing wifi on my phone, esp jumped into event SYSTEM_EVENT_STA_START. And i don't know why this event happened instead of SYSTEM_EVENT_STA_DISCONNECTED event. Somebody help me. Thank you

This is WifiClientEvents example code:

Code: Select all

/*
    This sketch shows the WiFi event usage
 
*/
 
/*
  WiFi Events
 
  0  SYSTEM_EVENT_WIFI_READY               < ESP32 WiFi ready
  1  SYSTEM_EVENT_SCAN_DONE                < ESP32 finish scanning AP
  2  SYSTEM_EVENT_STA_START                < ESP32 station start
  3  SYSTEM_EVENT_STA_STOP                 < ESP32 station stop
  4  SYSTEM_EVENT_STA_CONNECTED            < ESP32 station connected to AP
  5  SYSTEM_EVENT_STA_DISCONNECTED         < ESP32 station disconnected from AP
  6  SYSTEM_EVENT_STA_AUTHMODE_CHANGE      < the auth mode of AP connected by ESP32 station changed
  7  SYSTEM_EVENT_STA_GOT_IP               < ESP32 station got IP from connected AP
  8  SYSTEM_EVENT_STA_LOST_IP              < ESP32 station lost IP and the IP is reset to 0
  9  SYSTEM_EVENT_STA_WPS_ER_SUCCESS       < ESP32 station wps succeeds in enrollee mode
  10 SYSTEM_EVENT_STA_WPS_ER_FAILED        < ESP32 station wps fails in enrollee mode
  11 SYSTEM_EVENT_STA_WPS_ER_TIMEOUT       < ESP32 station wps timeout in enrollee mode
  12 SYSTEM_EVENT_STA_WPS_ER_PIN           < ESP32 station wps pin code in enrollee mode
  13 SYSTEM_EVENT_AP_START                 < ESP32 soft-AP start
  14 SYSTEM_EVENT_AP_STOP                  < ESP32 soft-AP stop
  15 SYSTEM_EVENT_AP_STACONNECTED          < a station connected to ESP32 soft-AP
  16 SYSTEM_EVENT_AP_STADISCONNECTED       < a station disconnected from ESP32 soft-AP
  17 SYSTEM_EVENT_AP_STAIPASSIGNED         < ESP32 soft-AP assign an IP to a connected station
  18 SYSTEM_EVENT_AP_PROBEREQRECVED        < Receive probe request packet in soft-AP interface
  19 SYSTEM_EVENT_GOT_IP6                  < ESP32 station or ap or ethernet interface v6IP addr is preferred
  20 SYSTEM_EVENT_ETH_START                < ESP32 ethernet start
  21 SYSTEM_EVENT_ETH_STOP                 < ESP32 ethernet stop
  22 SYSTEM_EVENT_ETH_CONNECTED            < ESP32 ethernet phy link up
  23 SYSTEM_EVENT_ETH_DISCONNECTED         < ESP32 ethernet phy link down
  24 SYSTEM_EVENT_ETH_GOT_IP               < ESP32 ethernet got IP from connected AP
  25 SYSTEM_EVENT_MAX
*/
 
#include <WiFi.h>
 
const char* ssid     = "your-ssid";
const char* password = "your-password";
 
 
void WiFiEvent(WiFiEvent_t event)
{
  Serial.printf("[WiFi-event] event: %d\n", event);
 
  switch (event) {
    case SYSTEM_EVENT_WIFI_READY:
      Serial.println("WiFi interface ready");
      break;
    case SYSTEM_EVENT_SCAN_DONE:
      Serial.println("Completed scan for access points");
      break;
    case SYSTEM_EVENT_STA_START:
      Serial.println("WiFi client started");
      break;
    case SYSTEM_EVENT_STA_STOP:
      Serial.println("WiFi clients stopped");
      break;
    case SYSTEM_EVENT_STA_CONNECTED:
      Serial.println("Connected to access point");
      break;
    case SYSTEM_EVENT_STA_DISCONNECTED:
      Serial.println("Disconnected from WiFi access point");
      break;
    case SYSTEM_EVENT_STA_AUTHMODE_CHANGE:
      Serial.println("Authentication mode of access point has changed");
      break;
    case SYSTEM_EVENT_STA_GOT_IP:
      Serial.print("Obtained IP address: ");
      Serial.println(WiFi.localIP());
      break;
    case SYSTEM_EVENT_STA_LOST_IP:
      Serial.println("Lost IP address and IP address is reset to 0");
      break;
    case SYSTEM_EVENT_STA_WPS_ER_SUCCESS:
      Serial.println("WiFi Protected Setup (WPS): succeeded in enrollee mode");
      break;
    case SYSTEM_EVENT_STA_WPS_ER_FAILED:
      Serial.println("WiFi Protected Setup (WPS): failed in enrollee mode");
      break;
    case SYSTEM_EVENT_STA_WPS_ER_TIMEOUT:
      Serial.println("WiFi Protected Setup (WPS): timeout in enrollee mode");
      break;
    case SYSTEM_EVENT_STA_WPS_ER_PIN:
      Serial.println("WiFi Protected Setup (WPS): pin code in enrollee mode");
      break;
    case SYSTEM_EVENT_AP_START:
      Serial.println("WiFi access point started");
      break;
    case SYSTEM_EVENT_AP_STOP:
      Serial.println("WiFi access point  stopped");
      break;
    case SYSTEM_EVENT_AP_STACONNECTED:
      Serial.println("Client connected");
      break;
    case SYSTEM_EVENT_AP_STADISCONNECTED:
      Serial.println("Client disconnected");
      break;
    case SYSTEM_EVENT_AP_STAIPASSIGNED:
      Serial.println("Assigned IP address to client");
      break;
    case SYSTEM_EVENT_AP_PROBEREQRECVED:
      Serial.println("Received probe request");
      break;
    case SYSTEM_EVENT_GOT_IP6:
      Serial.println("IPv6 is preferred");
      break;
    case SYSTEM_EVENT_ETH_START:
      Serial.println("Ethernet started");
      break;
    case SYSTEM_EVENT_ETH_STOP:
      Serial.println("Ethernet stopped");
      break;
    case SYSTEM_EVENT_ETH_CONNECTED:
      Serial.println("Ethernet connected");
      break;
    case SYSTEM_EVENT_ETH_DISCONNECTED:
      Serial.println("Ethernet disconnected");
      break;
    case SYSTEM_EVENT_ETH_GOT_IP:
      Serial.println("Obtained IP address");
      break;
  }
}
 
void WiFiGotIP(WiFiEvent_t event, WiFiEventInfo_t info)
{
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(IPAddress(info.got_ip.ip_info.ip.addr));
}
 
void setup()
{
  Serial.begin(115200);
 
  // delete old config
  WiFi.disconnect(true);
 
  delay(1000);
 
  // Examples of different ways to register wifi events
  WiFi.onEvent(WiFiEvent);
  WiFi.onEvent(WiFiGotIP, WiFiEvent_t::SYSTEM_EVENT_STA_GOT_IP);
  WiFiEventId_t eventID = WiFi.onEvent([](WiFiEvent_t event, WiFiEventInfo_t info) {
    Serial.print("WiFi lost connection. Reason: ");
    Serial.println(info.disconnected.reason);
  }, WiFiEvent_t::SYSTEM_EVENT_STA_DISCONNECTED);
 
  // Remove WiFi event
  Serial.print("WiFi Event ID: ");
  Serial.println(eventID);
  // WiFi.removeEvent(eventID);
 
  WiFi.begin(ssid, password);
 
  Serial.println();
  Serial.println();
  Serial.println("Wait for WiFi... ");
}
 
void loop()
{
  delay(1000);
}
This is result when i turn off wifi broadcasting on the phone:
Image

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