#include <ESP8266WiFi.h>
const char* ssid = "TP-Link_6742"; // type your wifi name
const char* password = "26051973"; // type your wifi password
int ledPin = D1;
WiFiServer server(80);
void setup() {
Serial.begin(115200);
delay(10);
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, HIGH);
// Connect to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
// Start the server
server.begin();
Serial.println("Server started");
// Print the IP address
Serial.print("Use this URL to connect: ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");
}
void loop() {
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
// Wait until the client sends some data
Serial.println("new client");
while(!client.available()){
delay(1);
}
// Read the first line of the request
String request = client.readStringUntil('\r');
Serial.println(request);
client.flush();
// Match the request
int value = LOW;
if (request.indexOf("/LED=ON") != -1) {
for (int j =0; j<3 ; j++)
{
digitalWrite(ledPin, LOW);
delay(100);
digitalWrite(ledPin, HIGH);
delay(100);
}digitalWrite(ledPin, HIGH);
value = HIGH;
}
if (request.indexOf("/LED=OFF") != -1) {
for (int j =0; j<3 ; j++)
{
digitalWrite(ledPin, LOW);
delay(100);
digitalWrite(ledPin, HIGH);
delay(100);
}
digitalWrite(ledPin, LOW);
value = LOW;
}
// Set ledPin according to the request
//digitalWrite(ledPin, value);
// Return the response
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println(""); // do not forget this one
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.print("Led is now: ");
if(value == HIGH) {
client.print("On");
} else {
client.print("Off");
}
client.println("<br><br>");
client.println("<a href=\"/LED=ON\"\"><button>On </button></a>");
client.println("<a href=\"/LED=OFF\"\"><button>Off </button></a><br />");
client.println("</html>");
delay(1);
Serial.println("Client disonnected");
Serial.println("");
}
Wifi_control_LED:6: error: 'D1' was not declared in this scope
int ledPin = D1;
^
exit status 1
'D1' was not declared in this scope
This Is The Error
Hi @yjhdhmkij. Which board do you have selected from the Arduino IDE's Tools > Board menu?
D1 is usually just predefined macro for digital pin 1 so you could just replace it with your led pin number, probably 1
what I meant was it is usually a predefined macro if you didn’t catch it, obviously it is not defined in OP case. This is why substituting it to 1 may solve the problem.
Folks, please be polite, and I mean everyone.
Maybe edit your posts a little.
Thanks,
It compiles just fine here. You probably have the wrong board selected in "tools" in the IDE.
thank you all my problem is solved now
If @yjhdhmkij is using the following ESP8266 board (Fig-1), then D1 is pre-defined for Arduino DPin-5.
Figure-1:
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