#include <ESP8266WiFi.h>
#include <ThingSpeak.h>

const char* ssid = "Wokwi-GUEST";  // WiFi Wokwi
const char* password = "";         // Tiada password untuk Wokwi
const char* apiKey = "YOUR_THINGSPEAK_API_KEY";

WiFiClient client;

unsigned long channelID = YOUR_CHANNEL_ID;

int trigPin = D5;  
int echoPin = D6;  
int ledPin = D2;
float waterLevel;

void setup() {
  Serial.begin(115200);
    WiFi.begin(ssid, password);
      while (WiFi.status() != WL_CONNECTED) {
          delay(500);
              Serial.print(".");
                }
                  Serial.println("\nConnected to WiFi!");

                    ThingSpeak.begin(client);

                      pinMode(trigPin, OUTPUT);
                        pinMode(echoPin, INPUT);
                          pinMode(ledPin, OUTPUT);
                          }

                          void loop() {
                            digitalWrite(trigPin, LOW);
                              delayMicroseconds(2);
                                digitalWrite(trigPin, HIGH);
                                  delayMicroseconds(10);
                                    digitalWrite(trigPin, LOW);

                                      long duration = pulseIn(echoPin, HIGH);
                                        waterLevel = duration * 0.034 / 2;

                                          Serial.print("Water Level: ");
                                            Serial.println(waterLevel);

                                              ThingSpeak.writeField(channelID, 1, waterLevel, apiKey);

                                                // Jika paras air tinggi, nyalakan LED (simulasi amaran)
                                                  if (waterLevel < 10) {  
                                                      digitalWrite(ledPin, HIGH);  
                                                          Serial.println("WARNING: High Water Level!");
                                                            } else {
                                                                digitalWrite(ledPin, LOW);
                                                                  }

                                                                    delay(15000); // Update setiap 15 saat
                                                                    }