I am using the default example SimpleWiFiServer that comes as an example from the ESP32:
#include <WiFi.h>
#include <WiFiClient.h>
#include <WiFiAP.h>
#define LED_BUILTIN 2 // Set the GPIO pin where you connected your test LED or comment this line out if your dev board has a built-in LED
// Set these to your desired credentials.
const char *ssid = "MyNetwork";
//const char *password = "YourPassword";
WiFiServer server(80);
void setup() {
pinMode(LED_BUILTIN, OUTPUT);
Serial.begin(115200);
Serial.println();
Serial.println("Configuring access point...");
// You can remove the password parameter if you want the AP to be open.
//tcpip_adapter_dns_info_t dns_info;
//dns_info.ip.u_addr.ip4.addr = IPAddress(192,168,4,1);
//tcpip_adapter_set_dns_info(TCPIP_ADAPTER_IF_AP, TCPIP_ADAPTER_DNS_MAIN, &dns_info);
WiFi.softAP(ssid);
IPAddress myIP = WiFi.softAPIP();
Serial.print("AP IP address: ");
Serial.println(myIP);
server.begin();
Serial.println("Server started");
}
void loop() {
WiFiClient client = server.available(); // listen for incoming clients
if (client) { // if you get a client,
Serial.println("New Client."); // print a message out the serial port
String currentLine = ""; // make a String to hold incoming data from the client
while (client.connected()) { // loop while the client's connected
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
Serial.write(c); // print it out the serial monitor
if (c == '\n') { // if the byte is a newline character
// if the current line is blank, you got two newline characters in a row.
// that's the end of the client HTTP request, so send a response:
if (currentLine.length() == 0) {
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println();
// the content of the HTTP response follows the header:
client.print("Click <a href=\"/H\">here</a> to turn ON the LED.<br>");
client.print("Click <a href=\"/L\">here</a> to turn OFF the LED.<br>");
// The HTTP response ends with another blank line:
client.println();
// break out of the while loop:
break;
} else { // if you got a newline, then clear currentLine:
currentLine = "";
}
} else if (c != '\r') { // if you got anything else but a carriage return character,
currentLine += c; // add it to the end of the currentLine
}
// Check to see if the client request was "GET /H" or "GET /L":
if (currentLine.endsWith("GET /H")) {
digitalWrite(LED_BUILTIN, HIGH); // GET /H turns the LED on
}
if (currentLine.endsWith("GET /L")) {
digitalWrite(LED_BUILTIN, LOW); // GET /L turns the LED off
}
}
}
// close the connection:
client.stop();
Serial.println("Client Disconnected.");
}
}
That initializes the ESP32 as an Access Point. On my phone I am able to see the network MyNetwork. If I connect to it and then open a my browser and go to 192.168.4.1 I am able to see the default page.
How can I change that code so that when I connect to that network it automatically open my browser going to http://192.168.4.1 ?
When researching on the internet I found this library that does that WiFiManager . That library helps you connect to an existing WiFi network. I do not want to do that. I only want that when I connect to MyNetwork my default page opens up just like when you connect to guest networks on hotels etc.
Other people on the internet have modified WiFiAPP.cpp and added these three lines of code:
tcpip_adapter_dns_info_t dns_info;
dns_info.ip.u_addr.ip4.addr = IPAddress(192,168,4,1);
tcpip_adapter_set_dns_info(TCPIP_ADAPTER_IF_AP, TCPIP_ADAPTER_DNS_MAIN, &dns_info);
That only makes my esp32 crash and does not work.
Has someone figure out a simple way to open a popup window (captive portal) pointing to http://192.168.4.1 once you connect to the ESP32 access point?
Lastly I found this example but that is using esp8266.
