// proses include library
#include "DHTesp.h"
#include "WiFi.h"
#include "HTTPClient.h"
// deklarasi variable
// set pin yang digunakan
#define DHTPIN 15
const char* ssid = "Wokwi-GUEST";
const char* password = "";
// deklarasi object sensor
// set tipe DHT dan pin yang digunakan
DHTesp dht;
// url endpoint data of device
const char* serverName = "https://platform.antares.id:8080/~/antares-cse/antares-id/paogah/Temperature-Sensor";
// inisiasi variable
unsigned long lastTime = 0;
// Setting timer 5 detik
unsigned long timerDelay = 5000;
void setup() {
// inisiasi interface serial
Serial.begin(115200);
Serial.println("Akuisisi sensor DHT22 via ESP32");
// inisiasi sensor DHT
dht.setup(DHTPIN, DHTesp::DHT22);
// inisiasi WiFi Client
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() {
//rutin melakukan pengiriman data setiap waktu yang diset
if ((millis() - lastTime) > timerDelay) {
// deklarasi objek untuk menampung data
// temperatur dan kelembapan dari DHT22
TempAndHumidity data = dht.getTempAndHumidity();
// ekstrak data temperature
float temp = data.temperature;
// ekstrak data humidity
float hum = data.humidity;
// menampilkan data di serial
Serial.println("Suhu: " + String(temp, 2) + "°C");
Serial.println("Kelembaban: " + String(hum, 1) + "%");
Serial.println("---");
// waktu jeda sampling data
// minimal 2 detik
delay(5000);
// mengecek koneksi wifi
if(WiFi.status()== WL_CONNECTED){
WiFiClient client;
HTTPClient http;
// inisiasi komunikasi http
http.begin(client, serverName);
// inisiasi http header
http.addHeader("X-M2M-Origin","e988b1065a70932a:86fa41ece15d0579");
http.addHeader("Content-Type", "application/json;ty=4");
http.addHeader("Accept", "application/json");
// inisiasi data yang dikirim di restful api
String httpRequestData ="{\"m2m:cin\": { \"con\":\"{\\\"temp\\\":\\\"";
httpRequestData = httpRequestData + String(temp, 2);
httpRequestData = httpRequestData + "\\\",\\\"hum\\\":\\\"";
httpRequestData = httpRequestData + String(hum,1);
httpRequestData = httpRequestData + "\\\"}\"}}";
// mengirimkan HTTP POST request
int httpResponseCode = http.POST(httpRequestData);
Serial.print("HTTP Response code: ");
Serial.println(httpResponseCode);
// menutup koneksi
http.end();
}
else {
Serial.println("WiFi Disconnected");
}
lastTime = millis();
}
}