Example for Arduino ESP8266, ESP32 WiFi connect with max tries

esp8266-wifi-connect.ino

#include <ESP8266WiFi.h>

#define WIFI_SSID       "MY SSID"
#define WIFI_PASSWORD   "MY PASS"

bool isConnected() {
  return (WiFi.status() == WL_CONNECTED);
}

void connectToWiFi(int max_tries = 20, int pause = 500) {
  int i = 0;
  WiFi.mode(WIFI_STA);
  
  #if defined(ARDUINO_ARCH_ESP8266)
    WiFi.forceSleepWake();
    delay(200);
  #endif
  
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  
  do {
    delay(pause);
    Serial.print(".");
  } while (!isConnected() || i++ < max_tries);
  
  WiFi.setAutoReconnect(true);
  WiFi.persistent(true); 
}

void setup()
{
    Serial.begin(115200);
	connectToWiFi();	
}