4.- ESP32 Soft Access Point. Web Server. Web page on/off LED2. Check status LED2.
Now ESP32 is an Acces Point. ESP32 creates the network 192.168.4.X
I have named this network “juan”.
It is independent of the Router.
If we want to connect with this ESP32 we must change the WiFi configuration of our mobile. [Setting / WiFi ]
We must connect to the network “juan” password “123456789”.
[If our mobile is connected to the Router (192.168.1.X), we cannot connect to ESP32, we must change our mobile to the 192.168.4.X network]
// Juan A. Villalpando.
// KIO4.COM
// Creación de un Punto de Acceso.
#include <WiFi.h>
#include <WiFiClient.h>
#include <WiFiAP.h>
const char* ssid = "Juan";
const char* password = "123456789";
WiFiServer server(80); // Port 80
#define LED2 2 // LED2 is a Built-in LED.
String estado = "";
void setup() {
Serial.begin(115200);
pinMode(LED2, OUTPUT);
// Conecta a la red wifi.
Serial.println();
Serial.print("Setting Access Point: ");
Serial.println(ssid);
WiFi.softAP(ssid, password);
IPAddress myIP = WiFi.softAPIP();
// Esta es la IP
Serial.print("This is IP to connect to the WebServer: ");
Serial.print("http://");
Serial.println(myIP);
// Start Web Server.
server.begin();
Serial.println("Web Server started.");
}
void loop() {
// Check if a client has connected..
WiFiClient client = server.available();
if (!client) {
return;
}
Serial.print("New client: ");
Serial.println(client.remoteIP());
// Espera hasta que el cliente envíe datos.
// while(!client.available()){ delay(1); }
/////////////////////////////////////////////////////
// Read the information sent by the client.
String req = client.readStringUntil('\r');
Serial.println(req);
// Make the client's request.
if (req.indexOf("on2") != -1) {digitalWrite(LED2, HIGH); estado = "ON";}
if (req.indexOf("off2") != -1){digitalWrite(LED2, LOW); estado = "OFF";}
if (req.indexOf("consulta") != -1){
if (digitalRead(LED2)){estado = "LED2 now is ON";}
else {estado = "LED2 now is OFF";}
}
//////////////////////////////////////////////
// WEB PAGE. ////////////////////////////
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println(""); // Important.
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("<head><meta charset=utf-8></head>");
client.println("<body><center><font face='Arial'>");
client.println("<h1>Servidor web con ESP32.</h1>");
client.println("<h2><font color='#009900'>KIO4.COM - Juan A. Villalpando</font></h2>");
client.println("<h3>Página web.</h3>");
client.println("<br><br>");
client.println("<a href='on2'><button>Click to ON LED2</button></a>");
client.println("<a href='off2'><button>Click to OFF LED2</button></a>");
client.println("<a href='consulta'><button>Consult status LED2</button></a>");
client.println("<br><br>");
client.println(estado);
client.println("</font></center></body></html>");
Serial.print("Client disconnected: ");
Serial.println(client.remoteIP());
client.flush();
client.stop();
}
