#include <WiFi.h>
#include <PubSubClient.h>
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";
const int mqtt_port = 1883;
// const char* mqtt_username = "";
// const char* mqtt_password = "";
const char* mqtt_topic = "GrupUnimed/actuate_lamp";
WiFiClient espClient;
PubSubClient client(espClient);
int led1 = 14;
int led2 = 15;
void callback(char* topic, byte* payload, unsigned int length) {
if (length == 0) return;
String msg = "";
for (int i = 0; i < length; i++) {
msg += (char)payload[i];
}
if (msg == "Turn Off") {
digitalWrite(led1, LOW);
digitalWrite(led2, LOW);
}
else if (msg == "Turn On") {
digitalWrite(led1, HIGH);
digitalWrite(led2, LOW); // Hidupkan hanya LED 1
}
else if (msg == "Turn On All") {
digitalWrite(led1, HIGH);
digitalWrite(led2, HIGH); // Hidupkan kedua LED
}
}
void setup_wifi() {
delay(10);
Serial.begin(115200);
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void reconnect() {
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
if (client.connect("Hamzah17")) {
Serial.println("connected");
client.subscribe(mqtt_topic);
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
delay(5000);
}
}
}
void setup() {
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
setup_wifi();
client.setServer(mqtt_server, mqtt_port);
client.setCallback(callback);
}
void loop() {
if (!client.connected()) {
reconnect();
}
client.loop();
}