ESP8266 Community Forum

Posted: **Wed Apr 15, 2020 9:36 pm**

I am an ESP8266 noob...and I am trying to create a WiFi controller for LED strip lights. My ESP8266 is connecting to my router and receiving an IP address. But when I plug the IP address into my computer browser the connection is refused.

I am using a Mac running OS 10.15; Arduino IDE 1.8.12;

This is the current code I am using:
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>

//SSID and Password of your WiFi router
const char* ssid = "***********";
const char* password = "************";

ESP8266WebServer server(80);

//LED Connections
const int RedLED=16; //D1 GPIO15
const int GreenLED=5; //D2 GPIO12
const int BlueLED=4; //D0 GPIO13

String setcolor="#ff00ff"; //Set color for HTML

const char MAIN_page[] PROGMEM = R"=====(
<!DOCTYPE html>
<html>
<head>
<title>Mood Lamp (RGB LED Color) Controller</title>
</head>
<body style="background:@@color@@;">

<center>
Mood Lamp (RGB LED Color) Controller<br><br><br>
<form method="post" action="/form">
Color:
<input type="color" name="color" value="@@color@@">
<button type="submit" name="state" value="stop">SET</button>
</form>
<br><br><br>
<a href="https://circuits4you.com">Circuits4you.com</a><br>
</center>
</body>
</html>
)=====";

//=======================================================================
// handles main page
//=======================================================================
void handleRoot() {
String p = MAIN_page;
p.replace("@@color@@",setcolor); //Set page background color and selected color
server.send(200, "text/html", p);
}

//=======================================================================
// Handle Set Color
//=======================================================================
void handleForm() {
String color = server.arg("color");
//form?color=%23ff0000
setcolor = color; //Store actual color set for updating in HTML
Serial.println(color);

//See what we have recived
//We get #RRGGBB in hex string

// Get rid of '#' and convert it to integer, Long as we have three 8-bit i.e. 24-bit values
long number = (int) strtol( &color[1], NULL, 16);

//Split them up into r, g, b values
long r = number >> 16;
long g = (number >> 8) & 0xFF;
long b = number & 0xFF;

//PWM Correction
r = r * 4;
g = g * 4;
b = b * 4;
//for ULN2003 or Common Cathode RGB LED not needed
/*
r = 1024 - r;
g = 1024 - g;
b = 1024 - b;
*/
//ESP supports analogWrite All IOs are PWM
analogWrite(RedLED,r);
analogWrite(GreenLED,g);
analogWrite(BlueLED,b);

server.sendHeader("Location", "/");
server.send(302, "text/plain", "Updated-- Press Back Button");

delay(500);
}
//=======================================================================
// SETUP
//=======================================================================
void setup(){
Serial.begin(115200); //Start serial connection

pinMode(RedLED,OUTPUT);
pinMode(GreenLED,OUTPUT);
pinMode(BlueLED,OUTPUT);

WiFi.begin(ssid, password); //Connect to your WiFi router
Serial.println("");

// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}

//If connection successful show IP address in serial monitor
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP()); //IP address assigned to your ESP

server.on("/", handleRoot); //Associate handler function to path
server.on("/form",handleForm);

server.begin(); //Start server
Serial.println("HTTP server started");
}
//=======================================================================
// LOOP
//=======================================================================
void loop(){
server.handleClient();
}

Can anyone help this noob out?

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