nodeMCU D1 핀에 LED를 연결하여 On, Off 합니다.
A : LED 내부 작은 조각은 +입니다.
B : 저항 330옴 무극성으로 -라인에 연결합니다.
C : LED+라인과 D1핀을 연결합니다.
D : GND(-)을 -줄에 연결합니다.
출처: https://spring99.tistory.com/90 [Spring99]
#include <ESP8266WiFi.h>
const char* ssid = "IOT22";
const char* password = "zzz19540410";
WiFiServer server(80);
void setup() {
Serial.begin(115200);
delay(10);
pinMode(5, OUTPUT);
pinMode(4, OUTPUT);
digitalWrite(5, LOW);
digitalWrite(4, LOW);
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");
server.begin();
Serial.println("Server started");
Serial.print("Use this URL to connect: ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");
}
void loop() {
WiFiClient client = server.available();
if (!client) {
return;
}
while (!client.available()) {
delay(1);
}
String request = client.readStringUntil('\r');
Serial.println(request);
client.flush();
int state = LOW;
if (request.indexOf("/On") != -1) {
digitalWrite(5, HIGH);
state = HIGH;
}
if (request.indexOf("/Off") != -1) {
digitalWrite(5, LOW);
state = LOW;
}
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.println("<h1 align=center>WiFi LED On, Off</h1><br><br>");
client.print("Stepper motor moving= ");
if (state == HIGH) {
client.print("On");
} else {
client.print("Off");
}
client.println("<br><br>");
client.println("<a href=\"/On\"\"><button>ON </button></a>");
client.println("<a href=\"/Off\"\"><button>OFF </button></a><br />");
client.println("</html>");
delay(1);
Serial.println("Client disonnected");
Serial.println("");
}
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