ninja_stopwatch_stop.ino

#include <ESP8266HTTPClient.h>

#include <ESP8266WiFi.h>
#include <WiFiClient.h>

const char* ssid = "ssid";
const char* password = "pass";
String serverName = "http://192.168.8.102:8000/stop";

int ledpin = 5; // D1(gpio5)
int button = 4; //D2(gpio4)
int buttonState = 0;
int currentButtonState;             
int lastButtonState = LOW; 

unsigned long lastDebounceTime = 0;  
unsigned long debounceDelay = 50; 

void setup() {
 pinMode(ledpin, OUTPUT);
 pinMode(button, INPUT);

 Serial.begin(115200); 

  WiFi.begin(ssid, password);
  Serial.println("Connecting");
  while(WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP());
 
  Serial.println("Timer set to 5 seconds (timerDelay variable), it will take 5 seconds before publishing the first reading.");
}

void loop() {
  buttonState = digitalRead(button); // put your main code here, to run repeatedly:

  if (buttonState != lastButtonState) {
    lastDebounceTime = millis();
  }

  if ((millis() - lastDebounceTime) > debounceDelay) {
    
    if (buttonState != currentButtonState) {
      
      currentButtonState = buttonState;

      if (currentButtonState == HIGH) {
        digitalWrite(ledpin, LOW);
      }

      if (currentButtonState == LOW)
      {
        digitalWrite(ledpin, HIGH); 

        if(WiFi.status()== WL_CONNECTED) {
          WiFiClient client;
          HTTPClient http;

          String serverPath = serverName;
          
          // Your Domain name with URL path or IP address with path
          http.begin(client, serverPath.c_str());
          
          // Send HTTP GET request
          int httpResponseCode = http.GET();
          
          if (httpResponseCode>0) {
            Serial.print("HTTP Response code: ");
            Serial.println(httpResponseCode);
            String payload = http.getString();
            Serial.println(payload);
          }
          else {
            Serial.print("Error code: ");
            Serial.println(httpResponseCode);
          }
          // Free resources
          http.end();
        }
        else {
          Serial.println("WiFi Disconnected");
        }  
      }
    }
  }

  lastButtonState = buttonState;
}