Deteksi Ketinggian Banjir berbasis NodeMCU dan Blynk

#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

// Authorization token from the Blynk App.
char auth[] = "7683eab38c524f71869e07cd3affda1f";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "ALHUSNA";
char pass[] = "wetgareng";


const int sensorPin= A0;
float liquid_level;
int liquid_graph;
const int LedHijau = D1;
const int LedKuning = D2;
const int LedMerah = D3;
const int Buzzer = D4;
const int BatasBawah = 250;
const int BatasAtas = 550;

        void setup() {
          Serial.begin(9600);
          Blynk.begin(auth, ssid, pass);
          pinMode(LedMerah, OUTPUT);
          pinMode(LedHijau, OUTPUT) ;
          pinMode(LedKuning, OUTPUT) ;
          pinMode (Buzzer, OUTPUT);
          pinMode(sensorPin, INPUT);
          Blynk.virtualWrite(V0, liquid_level);
          Blynk.virtualWrite(V1, liquid_graph);//This wil show the percentage of water in the container in a virtual pin V1
          Blynk.run();
        // initialize the LED pin as an output:
        pinMode(LedMerah, OUTPUT);
        pinMode(LedHijau, OUTPUT) ;
        pinMode(LedKuning, OUTPUT) ;
        pinMode (Buzzer, OUTPUT);
        // initialize serial communications:
        
        }

        void loop() {
        // read the value of the potentiometer:
        liquid_level = analogRead(sensorPin);
        liquid_graph =analogRead(sensorPin);//Percentage of water in the container 
        Serial.println(liquid_level);//This will print the liquid level in the monitor 
        Serial.println(liquid_graph);//This will print the percentage of liquid in the monitor
        Blynk.virtualWrite(V0, liquid_level);
        Blynk.virtualWrite(V1, liquid_graph);
        
        Blynk.run();
        int analogValue = analogRead(sensorPin);

        // if the analog value is high enough, turn on the LED:
        if (analogValue < BatasBawah) {
         digitalWrite(LedHijau, HIGH);
        } else {
         digitalWrite(LedHijau, LOW);
        }

        if (analogValue > BatasBawah ) {
        digitalWrite(LedKuning, HIGH);
        } else {
        digitalWrite(LedKuning, LOW);
        }

       if (analogValue > BatasAtas) {
       digitalWrite(LedKuning, LOW);
       digitalWrite(LedMerah, HIGH);
       digitalWrite(Buzzer , HIGH);
       
   
      } else {
       digitalWrite(LedMerah, LOW);
       digitalWrite(Buzzer , LOW);

      }
      // print the analog value:
      Serial.println(analogValue);
      delay(100);        // delay in between reads for stability
    }