// #
// Nama : Isma Tania Rahmawati
// NIM : 3.34.22.2.09
// Kelas : IK-2C
// #
#include <LiquidCrystal_I2C.h>
#include <DHTesp.h>
#include <PubSubClient.h>
#include <WiFi.h>
#define DHT_PIN 17 //berada di pin 17
DHTesp dhtSensor;
LiquidCrystal_I2C lcd(0x27, 20, 4);
WiFiClient espClient;
PubSubClient client(espClient);
const char* mqtt_server = "iotpintar.net";//mqtt
const int mqtt_port = 1883;
const char* mqtt_user = "";
const char* mqtt_password = "";
const char* ssid = "Wokwi-GUEST";//untuk wifi
float temperature;
float humidity;
void setup() {
Serial.begin(115200);
setup_wifi();
client.setServer(mqtt_server, 1883);
dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
lcd.init();
lcd.backlight();
}
void loop() {
if (!client.connected()) {
reconnect();
}
client.loop();
TempAndHumidity data = dhtSensor.getTempAndHumidity();
temperature = data.temperature;
humidity = data.humidity;
lcd.clear();
lcd.setCursor(0, 1);
lcd.print("Kelembapan : ");
lcd.print(humidity);
lcd.println(" %");
lcd.setCursor(3, 2);
lcd.print("Suhu : ");
lcd.print(temperature);
lcd.println(" C");
// Kirim data ke dalam MQTT
char* topik_kelembapan = "polines/ik/33422209/RH";
client.publish(topik_kelembapan, String(humidity).c_str());
char* topik_suhu = "polines/ik/33422209/RT";
client.publish(topik_suhu, String(temperature).c_str());
delay(3000);
}
void setup_wifi() {
delay(10);
Serial.println();
Serial.print("Sedang Menghubungkan Ke Dalam ");
Serial.println(ssid);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println(".");
}
Serial.println("");
Serial.println("Selamat, WiFi berhasil terhubung!");
Serial.print("Alamat IP : ");
Serial.println(WiFi.localIP());
}
void reconnect() {
while (!client.connected()) {
Serial.print("Mencoba terhubung ke dalam server MQTT");
if (client.connect("ESP32Client", mqtt_user, mqtt_password)) {
Serial.println(" Selamat!");
Serial.println("Anda Telah Terhubung ke server MQTT");
}
else {
Serial.print("Gagal, kode status = ");
Serial.print(client.state());
Serial.println("Maaf, Silahkan Mencoba kembali dalam 5 detik");
delay(5000);//delay 5 detik
}
}
}