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esp32_client.ino

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+#include <SPI.h>
+#include <LoRa.h>
+#include <DHT.h>
+
+#define LORA_SS 5
+#define LORA_RST 14
+#define LORA_DIO0 2
+#define RELAY_PIN 27
+#define FIRE_SENSOR_PIN 33
+#define MQ2_SENSOR_PIN 26
+#define DHTPIN 4
+#define DHTTYPE DHT11
+#define SOIL_SENSOR_PIN 25
+
+DHT dht(DHTPIN, DHTTYPE);
+
+bool pengirimanAktif = true;
+bool relayAktifKarenaKebakaran = false;
+int lastRelayState = LOW;
+
+unsigned long lastSendTime = 0;
+const unsigned long interval = 1000;
+
+void setup() {
+  delay(3000);
+  Serial.begin(115200);
+  while (!Serial)
+    ;
+  Serial.println("Memulai setup...");
+
+  pinMode(RELAY_PIN, OUTPUT);
+  digitalWrite(RELAY_PIN, LOW);
+  Serial.println("Relay diset LOW");
+
+  pinMode(FIRE_SENSOR_PIN, INPUT);
+  pinMode(MQ2_SENSOR_PIN, INPUT);
+  dht.begin();
+
+  LoRa.setPins(LORA_SS, LORA_RST, LORA_DIO0);
+  delay(1000);
+  if (!LoRa.begin(433E6)) {
+    Serial.println("Gagal memulai LoRa");
+    while (1)
+      ;
+  }
+  Serial.println("LoRa siap mengirim");
+}
+
+void loop() {
+  if (Serial.available()) {
+    String cmd = Serial.readStringUntil('\n');
+    cmd.trim();
+
+    if (cmd == "pause") {
+      pengirimanAktif = false;
+      Serial.println("Pengiriman LoRa dihentikan");
+    } else if (cmd == "resume") {
+      pengirimanAktif = true;
+      Serial.println("Pengiriman LoRa dilanjutkan");
+    }
+  }
+
+  int fireDigital = digitalRead(FIRE_SENSOR_PIN);
+  int asapDigital = digitalRead(MQ2_SENSOR_PIN);
+  float suhuC = dht.readTemperature();
+  int soilRaw = analogRead(SOIL_SENSOR_PIN);
+  int kelembabanTanah = map(soilRaw, 1949, 4095, 100, 0);
+  kelembabanTanah = constrain(kelembabanTanah, 0, 100);
+
+  String statusApi = (fireDigital == LOW) ? "iya" : "tidak";
+  String statusAsap = (asapDigital == LOW) ? "iya" : "tidak";
+  bool suhuTinggi = suhuC > 40.0;
+
+  String statusKebakaran = "tidak";
+  if (fireDigital == LOW && asapDigital == LOW && suhuTinggi) {
+    statusKebakaran = "iya";
+  } else {
+    statusKebakaran = "tidak";
+  }
+
+  Serial.println("Sensor:");
+  Serial.println("  - Api: " + String(fireDigital == LOW ? "iya" : "tidak"));
+  Serial.println("  - Asap: " + String(asapDigital == LOW ? "iya" : "tidak"));
+  Serial.println("  - Suhu: " + String(suhuC, 1) + "C");
+  Serial.println("  - Tanah: " + String(kelembabanTanah) + "%");
+
+  if (statusKebakaran == "iya") {
+    digitalWrite(RELAY_PIN, HIGH);
+    relayAktifKarenaKebakaran = true;
+    Serial.println("Kebakaran terdeteksi! Relay ON");
+  } else if (relayAktifKarenaKebakaran && fireDigital == HIGH) {
+    Serial.println("Api padam");
+    delay(300);
+    digitalWrite(RELAY_PIN, LOW);
+    relayAktifKarenaKebakaran = false;
+    Serial.println("Relay dimatikan otomatis setelah api padam");
+  } else {
+    digitalWrite(RELAY_PIN, LOW);
+    relayAktifKarenaKebakaran = false;
+    Serial.println("Kondisi aman - Relay OFF");
+  }
+
+  if (millis() - lastSendTime > interval) {
+    lastSendTime = millis();
+
+    String apiStr = (fireDigital == LOW ? "iya" : "tidak");
+    String asapStr = (asapDigital == LOW ? "iya" : "tidak");
+    String suhuStr = isnan(suhuC) ? "nanC" : String(suhuC, 1) + "C";
+    String tanahStr = String(kelembabanTanah) + "%";
+    String relayStr = (digitalRead(RELAY_PIN) ? "ON" : "OFF");
+
+    String data = "api:" + apiStr + ",asap:" + asapStr + ",suhu:" + suhuStr + ",tanah:" + tanahStr + ",relay:" + relayStr;
+
+    String statusGabungan = "Status: " + statusApi + " - Relay " + relayStr;
+
+    if (pengirimanAktif) {
+      kirimLoRa(data);
+      delay(1000),
+        kirimLoRa(statusGabungan);
+      delay(1000);
+      Serial.println("Data dikirim:\n" + data);
+      Serial.println("Status dikirim:\n" + statusGabungan);
+    }
+  }
+
+  if (pengirimanAktif) {
+    kirimLoRa("kebakaran:" + statusKebakaran);
+    delay(300);
+    Serial.println("Status kebakaran dikirim: kebakaran:" + statusKebakaran);
+  }
+
+  delay(400);
+}
+
+void kirimLoRa(String pesan) {
+  Serial.println("LoRa kirim:\n" + pesan);
+  LoRa.beginPacket();
+  LoRa.print(pesan);
+  LoRa.endPacket();
+  delay(100);
+}