I had a Node MCU module as shown in the photo. My nodemcu
I had this tutorial from this link:Tutorial link
I had a problem with WIFI Configuring which from the code I had online it should be working with the browser 192.168.4.1 as shown as below. But with my LoLin NodeMCU V3 I cant reach to the browser page and always show the connection has timed out. Can I know is it my NodeMCU module problem? p.s. The wifi connection work well with hardcoding but not WIFI configuration) The Module i found there is slightly different from normal Nodemcu with a yellow component on it. I used ARDUINO IDE to compile and upload. proper result with the browser for wifi configuration
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <ESP8266WebServer.h>
#include <EEPROM.h>
//Variables
int i = 0;
int statusCode;
const char* ssid = "Default_SSID";
const char* passphrase = "Default_Password";
String st;
String content;
//Function Decalration
bool testWifi(void);
void launchWeb(void);
void setupAP(void);
//Establishing Local server at port 80 whenever required
ESP8266WebServer server(80);
void setup()
{
Serial.begin(115200); //Initialising if(DEBUG)Serial Monitor
Serial.println();
Serial.println("Disconnecting current wifi connection");
WiFi.disconnect();
EEPROM.begin(512); //Initialasing EEPROM
delay(10);
pinMode(LED_BUILTIN, OUTPUT);
Serial.println();
Serial.println();
Serial.println("Startup");
//---------------------------------------- Read eeprom for ssid and pass
Serial.println("Reading EEPROM ssid");
String esid;
for (int i = 0; i < 32; ++i)
{
esid += char(EEPROM.read(i));
}
Serial.println();
Serial.print("SSID: ");
Serial.println(esid);
Serial.println("Reading EEPROM pass");
String epass = "";
for (int i = 32; i < 96; ++i)
{
epass += char(EEPROM.read(i));
}
Serial.print("PASS: ");
Serial.println(epass);
WiFi.begin(esid.c_str(), epass.c_str());
if (testWifi())
{
Serial.println("Succesfully Connected!!!");
return;
}
else
{
Serial.println("Turning the HotSpot On");
launchWeb();
setupAP();// Setup HotSpot
}
Serial.println();
Serial.println("Waiting.");
while ((WiFi.status() != WL_CONNECTED))
{
Serial.print(".");
delay(100);
server.handleClient();
}
}
void loop() {
if ((WiFi.status() == WL_CONNECTED))
{
for (int i = 0; i < 10; i++)
{
digitalWrite(LED_BUILTIN, HIGH);
delay(1000);
digitalWrite(LED_BUILTIN, LOW);
delay(1000);
}
}
else
{
}
}
//----------------------------------------------- Fuctions used for WiFi credentials saving and connecting to it which you do not need to change
bool testWifi(void)
{
int c = 0;
Serial.println("Waiting for Wifi to connect");
while ( c < 20 ) {
if (WiFi.status() == WL_CONNECTED)
{
return true;
}
delay(500);
Serial.print("*");
c++;
}
Serial.println("");
Serial.println("Connect timed out, opening AP");
return false;
}
void launchWeb()
{
Serial.println("");
if (WiFi.status() == WL_CONNECTED)
Serial.println("WiFi connected");
Serial.print("Local IP: ");
Serial.println(WiFi.localIP());
Serial.print("SoftAP IP: ");
Serial.println(WiFi.softAPIP());
createWebServer();
// Start the server
server.begin();
Serial.println("Server started");
}
void setupAP(void)
{
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(100);
int n = WiFi.scanNetworks();
Serial.println("scan done");
if (n == 0)
Serial.println("no networks found");
else
{
Serial.print(n);
Serial.println(" networks found");
for (int i = 0; i < n; ++i)
{
// Print SSID and RSSI for each network found
Serial.print(i + 1);
Serial.print(": ");
Serial.print(WiFi.SSID(i));
Serial.print(" (");
Serial.print(WiFi.RSSI(i));
Serial.print(")");
Serial.println((WiFi.encryptionType(i) == ENC_TYPE_NONE) ? " " : "*");
delay(10);
}
}
Serial.println("");
st = "<ol>";
for (int i = 0; i < n; ++i)
{
// Print SSID and RSSI for each network found
st += "<li>";
st += WiFi.SSID(i);
st += " (";
st += WiFi.RSSI(i);
st += ")";
st += (WiFi.encryptionType(i) == ENC_TYPE_NONE) ? " " : "*";
st += "</li>";
}
st += "</ol>";
delay(100);
WiFi.softAP("ElectronicsInnovation", "");
Serial.println("Initializing_softap_for_wifi credentials_modification");
launchWeb();
Serial.println("over");
}
void createWebServer()
{
{
server.on("/", []() {
IPAddress ip = WiFi.softAPIP();
String ipStr = String(ip[0]) + '.' + String(ip[1]) + '.' + String(ip[2]) + '.' + String(ip[3]);
content = "<!DOCTYPE HTML>\r\n<html>Welcome to Wifi Credentials Update page";
content += "<form action=\"/scan\" method=\"POST\"><input type=\"submit\" value=\"scan\"></form>";
content += ipStr;
content += "<p>";
content += st;
content += "</p><form method='get' action='setting'><label>SSID: </label><input name='ssid' length=32><input name='pass' length=64><input type='submit'></form>";
content += "</html>";
server.send(200, "text/html", content);
});
server.on("/scan", []() {
//setupAP();
IPAddress ip = WiFi.softAPIP();
String ipStr = String(ip[0]) + '.' + String(ip[1]) + '.' + String(ip[2]) + '.' + String(ip[3]);
content = "<!DOCTYPE HTML>\r\n<html>go back";
server.send(200, "text/html", content);
});
server.on("/setting", []() {
String qsid = server.arg("ssid");
String qpass = server.arg("pass");
if (qsid.length() > 0 && qpass.length() > 0) {
Serial.println("clearing eeprom");
for (int i = 0; i < 96; ++i) {
EEPROM.write(i, 0);
}
Serial.println(qsid);
Serial.println("");
Serial.println(qpass);
Serial.println("");
Serial.println("writing eeprom ssid:");
for (int i = 0; i < qsid.length(); ++i)
{
EEPROM.write(i, qsid[i]);
Serial.print("Wrote: ");
Serial.println(qsid[i]);
}
Serial.println("writing eeprom pass:");
for (int i = 0; i < qpass.length(); ++i)
{
EEPROM.write(32 + i, qpass[i]);
Serial.print("Wrote: ");
Serial.println(qpass[i]);
}
EEPROM.commit();
content = "{\"Success\":\"saved to eeprom... reset to boot into new wifi\"}";
statusCode = 200;
ESP.reset();
} else {
content = "{\"Error\":\"404 not found\"}";
statusCode = 404;
Serial.println("Sending 404");
}
server.sendHeader("Access-Control-Allow-Origin", "*");
server.send(statusCode, "application/json", content);
});
}
}
I had tried several times with the code provided online but same results came out with the browser couldnt work.
