MDNS doesn't work when u switch the wifi modes
Posted: Sat May 28, 2016 11:39 amHi,
In my program, the program moves from WIFI_STA mode to WIFI_AP and then back to WIFI_STA.
but when I move back from WIFI_AP to WIFI_STA and try to declare the IP on MDNS, it doesnt seem to work. Example code below:
>> ping test.local doesnt work after the setup is completed.
Please help.
Salil
In my program, the program moves from WIFI_STA mode to WIFI_AP and then back to WIFI_STA.
but when I move back from WIFI_AP to WIFI_STA and try to declare the IP on MDNS, it doesnt seem to work. Example code below:
>> ping test.local doesnt work after the setup is completed.
Please help.
Salil
Code: Select all
/*
ESP8266 mDNS responder sample
*/
#include <ESP8266WiFi.h>
#include <ESP8266mDNS.h>
#include <WiFiClient.h>
const char* ssid = "Dhawan-2G";
const char* password = "esujgvxp";
// TCP server at port 80 will respond to HTTP requests
WiFiServer server(80);
void setup(void)
{
Serial.begin(9600);
// Connect to WiFi network
WiFi.softAPdisconnect();
WiFi.disconnect();
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
Serial.println("");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
// Set up mDNS responder:
if (!MDNS.begin("test")) {
Serial.println("Error setting up MDNS responder!");
while(1) {
delay(1000);
}
}
Serial.println("mDNS responder started");
// Add service to MDNS-SD
MDNS.addService("http", "tcp", 80);
delay(2000);
Serial.print("1");
//--------------------------------Now go to AP mode
WiFi.disconnect();
delay(500);
WiFi.softAP("test");
Serial.println(String("softap started - "));
WiFi.mode(WIFI_AP);
delay(10000);
Serial.print("2");
//-------------------------------------------------------------------
// Connect to WiFi network
WiFi.softAPdisconnect();
WiFi.disconnect();
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
Serial.println("");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
// Set up mDNS responder:
if (!MDNS.begin("test")) {
Serial.println("Error setting up MDNS responder!");
while(1) {
delay(1000);
}
}
Serial.println("mDNS responder started");
// Add service to MDNS-SD
//MDNS.addService("http", "tcp", 80);
//MDNS.update();
Serial.print("3");
server.begin();
Serial.println("TCP server started");
}
void loop(void)
{
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
Serial.println("");
Serial.println("New client");
// Wait for data from client to become available
while(client.connected() && !client.available()){
delay(1);
}
// Read the first line of HTTP request
String req = client.readStringUntil('\r');
// First line of HTTP request looks like "GET /path HTTP/1.1"
// Retrieve the "/path" part by finding the spaces
int addr_start = req.indexOf(' ');
int addr_end = req.indexOf(' ', addr_start + 1);
if (addr_start == -1 || addr_end == -1) {
Serial.print("Invalid request: ");
Serial.println(req);
return;
}
req = req.substring(addr_start + 1, addr_end);
Serial.print("Request: ");
Serial.println(req);
client.flush();
String s;
if (req == "/")
{
IPAddress ip = WiFi.localIP();
String ipStr = String(ip[0]) + '.' + String(ip[1]) + '.' + String(ip[2]) + '.' + String(ip[3]);
s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>Hello from ESP8266 at ";
s += ipStr;
s += "</html>\r\n\r\n";
Serial.println("Sending 200");
}
else
{
s = "HTTP/1.1 404 Not Found\r\n\r\n";
Serial.println("Sending 404");
}
client.print(s);
Serial.println("Done with client");
}