WiFi na ESP 32

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Obsługa WiFi na ESP32.

Deklaracje

#include "Arduino.h"
#include <WiFi.h>
 
const String WiFi_SSID = "nazwa_wifi";  // WiFi SSID
const String WiFi_password = "haslo_wifi";  // WiFi hasło
String WiFi_IP = "";  // WiFi IP uzupełniane po nawiązaniu połączenia
 
WiFiClient wifiClient;
 
void connectWiFi();

Połączenie podczas uruchomienia

void setup()
{
  connectWiFi();
}

Ponowne łączenie w przypadku rozłączenia

void loop()
{
  if (WiFi.status() != WL_CONNECTED) { connectWiFi(); }
  vTaskDelay(pdMS_TO_TICKS(10));
}

Funkcja

void connectWiFi()
{
  digitalWrite(BUILT_LED, LOW);
  WiFi.hostname(myHostname);
  WiFi.mode(WIFI_STA);
  WiFi.begin(WiFi_SSID, WiFi_password);
  int attempt = 0;
  Serial.print("Connecting to WiFi ");
 
  while (WiFi.status() != WL_CONNECTED)
  {
    if (attempt == 30)
        {
      Serial.println("Reboot po 30 probach polaczenia z WiFi");
      ESP.restart();
    }
    ++attempt;
    vTaskDelay(pdMS_TO_TICKS(500));
 
    wl_status_t status = WiFi.status();
    if(status != WL_CONNECTED) {
      digitalWrite(BUILT_LED, HIGH);
      Serial.print("   Connecting to WiFi error: ");
      Serial.println(status);
      vTaskDelay(pdMS_TO_TICKS(100));
      digitalWrite(BUILT_LED, LOW);
    }
  }
 
  WiFi_IP = WiFi.localIP().toString();
  Serial.println("Connected to WiFi:");
  Serial.println("         IP: " + String(WiFi_IP));
  Serial.println("   Hostname: " + myHostname);
  long rssi = WiFi.RSSI();
  Serial.print("     Signal: ");
  Serial.print(rssi);
  Serial.println(" dBm");
}

Poziomy sygnału dBm

Kody błędów

WL_NO_SHIELD	255	assigned when no WiFi shield is present
WL_IDLE_STATUS	0	it is a temporary status assigned when WiFi.begin() is called and remains active until the number of attempts expires (resulting in WL_CONNECT_FAILED) or a connection is established (resulting in WL_CONNECTED)
WL_NO_SSID_AVAIL	1	assigned when no SSID are available
WL_SCAN_COMPLETED	2	assigned when the scan networks is completed
WL_CONNECTED	3	assigned when connected to a WiFi network
WL_CONNECT_FAILED	4	assigned when the connection fails for all the attempts
WL_CONNECTION_LOST	5	assigned when the connection is lost
WL_DISCONNECTED	6	assigned when disconnected from a network