#include <WiFi.h>
#include <PubSubClient.h>
#include <AccelStepper.h>

AccelStepper stepper(AccelStepper::FULL4WIRE, 17, 5, 18, 19);
int pos = 0;

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";// MQTT broker
 
WiFiClient espClient;
PubSubClient client(espClient);
long lastMsg = 0;
char msg[50];
int value = 0;

void setup() {
  Serial.begin(115200);
  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());

  stepper.setMaxSpeed(1000);
  stepper.setAcceleration(1000);

  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

void callback(char* topic, byte* payload, unsigned int length) {
  String string;
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    string+=((char)payload[i]);  
  }
  Serial.println(string);
  if (topic ="MQTT-MySkill"){
    int data = string.toInt();
    pos += data;
  }
 }
void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("ESPClient")) {
      Serial.println("connected");
      client.subscribe("MQTT-MySkill");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds"); 
      delay(5000);
   }}}
void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop(); 
  stepper.moveTo(pos);
  stepper.run();
 
}