MultiWiFi

# MultiWiFi **MultiWifi** is a feature or technique used to allow the ESP32 to connect to multiple Wi-Fi networks. The idea is that the device can automatically switch between available Wi-Fi networks for better connectivity or reliability. It is very useful if you need the ESP32 to automatically connect to Wi-Fi in different locations, like at the office and at home, without reconfiguring the Wi-Fi SSID and password each time. ### Code Here’s an example where the ESP32 can connect to multiple Wi-Fi networks. If it fails to connect to the first network, it will try to connect to the second, and so on: ```cpp #include #include // Create an instance of WiFiMulti to handle multiple networks WiFiMulti wifiMulti; // Define your Wi-Fi credentials for multiple networks const char* ssid_1 = "Network_1"; // First Wi-Fi network SSID const char* password_1 = "Password_1"; // First Wi-Fi network password const char* ssid_2 = "Network_2"; // Second Wi-Fi network SSID const char* password_2 = "Password_2"; // Second Wi-Fi network password void setup() { // Start serial communication Serial.begin(115200); // Add Wi-Fi networks to WiFiMulti wifiMulti.addAP(ssid_1, password_1); wifiMulti.addAP(ssid_2, password_2); Serial.println("Connecting to Wi-Fi..."); // Try to connect to the Wi-Fi networks while (wifiMulti.run() != WL_CONNECTED) { Serial.print("."); delay(1000); } // Once connected, print the IP address Serial.println("Connected to Wi-Fi!"); Serial.print("IP Address: "); Serial.println(WiFi.localIP()); } void loop() { // Nothing to do in loop, ESP32 is connected to Wi-Fi } ``` ```cpp wifiMulti.addAP(ssid_1, password_1); ``` This line adds a Wi-Fi network (SSID and password) to the list of available networks that the ESP32 will attempt to connect to. When you call addAP, you’re telling the ESP32 to remember the Wi-Fi network details (SSID and password) so that it can try connecting to it later if needed. ```cpp wifiMulti.run() ``` wifiMulti.run(): This function tries to connect to the first available Wi-Fi network in the list. It continuously checks for a connection and returns the current connection status. ```cpp while (wifiMulti.run() != WL_CONNECTED) ``` ESP32 continuously tries to connect to a Wi-Fi network until a successful connection is made.