#include <WiFi.h>
#include <PubSubClient.h>
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.hivemq.com";
WiFiClient espClient;
PubSubClient client(espClient);
void setup_wifi() {
delay(10);
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
randomSeed(micros());
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void callback(char* topic, byte* payload, unsigned int length) {
Serial.print("Message arrived [");
Serial.print(topic);
Serial.print("] ");
for (int i = 0; i < length; i++) {
Serial.print((char)payload[i]);
}
Serial.println();
if (String(topic) == "/myskill/p/mqtt/led") {
if ((char)payload[0] == '0') {
digitalWrite(25, HIGH);
Serial.println("Hidup");
}
if ((char)payload[0] == '1') {
Serial.println("Mati");
digitalWrite(25, LOW);
}
if ((char)payload[0] == '2') {
Serial.println("Mundur");
digitalWrite(19, HIGH);
}
if ((char)payload[0] == '3') {
Serial.println("Mundur");
digitalWrite(19, LOW);
}
if ((char)payload[0] == '4') {
Serial.println("Kiri");
digitalWrite(14, HIGH);
}
if ((char)payload[0] == '5') {
Serial.println("Kiri Mati");
digitalWrite(14, LOW);
}
if ((char)payload[0] == '6') {
Serial.println("Kanan");
digitalWrite(4, HIGH);
}
if ((char)payload[0] == '7') {
Serial.println("Kanan Mati");
digitalWrite(4, LOW);
}
if ((char)payload[0] == '8') {
Serial.println("Maju");
digitalWrite(32, HIGH);
}
if ((char)payload[0] == '9') {
Serial.println("Maju Mati");
digitalWrite(32, LOW);
}
}
}
void reconnect() {
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
String clientId = "ESP32Client-";
clientId += String(random(0xffff), HEX);
if (client.connect(clientId.c_str())) {
Serial.println("Connected");
client.subscribe("/myskill/p/mqtt/led");
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
delay(5000);
}
}
}
void setup() {
pinMode(4, OUTPUT);
pinMode(19, OUTPUT);
pinMode(14, OUTPUT);
pinMode(25, OUTPUT);
pinMode(32, OUTPUT);
Serial.begin(115200);
setup_wifi();
client.setServer(mqtt_server, 1883);
client.setCallback(callback);
}
void loop() {
if (!client.connected()) {
reconnect();
}
client.loop();
}