[TUTORIAL] Menghubungkan ThingSpeak dengan ESP32 di Wokwi dan Visualisasi Data menggunakan Hosting Gratis (Project IoT Sensor Ultrasonik dan mengontrol LED Sederhana)

#include <WiFi.h>
#include <WiFiClient.h>
#include <ThingSpeak.h>

#define Merah 12
#define Kuning 27
#define Hijau 32

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

unsigned long channel = 2118033; //ID Channel project kita di Thingspeak
int ledMerah = 1;
int ledKuning = 2;
int ledHijau = 3;

WiFiClient client;

void setup() {
    Serial.begin(115200);
    pinMode(Merah, OUTPUT);
    pinMode(Kuning, OUTPUT);
    pinMode(Hijau, OUTPUT);
    digitalWrite(Merah, LOW);
    digitalWrite(Kuning, LOW);
    digitalWrite(Hijau, LOW);

    //terkoneksi ke WiFi
    Serial.println();
    Serial.println("terkoneksi ke ");
    Serial.println(ssid);
    WiFi.begin(ssid, pass);

    while(WiFi.status() != WL_CONNECTED){
        delay(300);
        Serial.print(".");
    }

    Serial.println();
    Serial.println("Terhubung WiFi");
    ThingSpeak.begin(client);
}

void loop() {
    int led_1 = ThingSpeak.readFloatField(channel, ledMerah);
    int led_2 = ThingSpeak.readFloatField(channel, ledKuning);
    int led_3 = ThingSpeak.readFloatField(channel, ledHijau);

    if(led_1==1){
  
        digitalWrite(Merah, HIGH);
        Serial.println("LED Merah menyala!");
    }

    else if(led_1==0){
        digitalWrite(Merah, LOW);
        Serial.println("LED Merah padam!");
    }

    if(led_2==1){
        digitalWrite(Kuning, HIGH);
        Serial.println("LED Kuning menyala!");
    }

    else if(led_2==0){
        digitalWrite(Kuning, LOW);
        Serial.println("LED Kuning padam!");
    }

    if(led_3==1){
        digitalWrite(Hijau, HIGH);
        Serial.println("LED Hijau menyala!");
    }

    else if(led_3==0){
        digitalWrite(Hijau, LOW);
        Serial.println("LED Hijau padam!");
    }

    delay(500); 
}