stepper motor sample

// Included the required library
#include <Stepper.h>
#include <WiFi.h>
#include <AWS_IOT.h>

AWS_IOT hornbill;

// Define the Wifi and AWS parameters
char WIFI_SSID[]="...";
char WIFI_PASSWORD[]="....";
char HOST_ADDRESS[]="...";
char CLIENT_ID[]= "...";
char TOPIC_NAME[]= "...";

//Initial State
int status = WL_IDLE_STATUS;
int tick=0,msgCount=0,msgReceived = 0;
char payload[512];
char rcvdPayload[512];
int dirStatus;

void mySubCallBackHandler (char *topicName, int payloadLen, char *payLoad)
{
    strncpy(rcvdPayload,payLoad,payloadLen);
    rcvdPayload[payloadLen] = 0;
    msgReceived = 1;
    Serial.print("Message arrived [");
    Serial.print(topicName);
    Serial.print("] ");
    for (int i = 0; i < payloadLen; i++) 
    {
    Serial.print((char)rcvdPayload[i]); // Print payload content
    }

    //Test
    Serial.print("dirStatus=");
     dirStatus = (char) rcvdPayload[8]; // Extracting the controlling command 
     //from the Payload to Controlling mottor from AWS 
    Serial.println(dirStatus); 
    Serial.println(); 
}


 
int Pin1 = 13; 
int Pin2 = 12; 
int Pin3 = 14; 
int Pin4 = 27; 
int _step = 0; 
int count=0;


 void setup() {
    pinMode(Pin1, OUTPUT);  
    pinMode(Pin2, OUTPUT);  
    pinMode(Pin3, OUTPUT);  
    pinMode(Pin4, OUTPUT); 
  
  // set the speed at 60 rpm:
  //motor.setSpeed(60);
  // initialize the serial port:
  Serial.begin(115200);
  delay(2000);
// Connection to Wifi and then AWS check
  while (status != WL_CONNECTED)
   {
      Serial.print("Attempting to connect to SSID: ");
      Serial.println(WIFI_SSID);
      // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
      status = WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

        // wait 5 seconds for connection:
      delay(5000);
   }

   Serial.println("Connected to wifi");

    if(hornbill.connect(HOST_ADDRESS,CLIENT_ID)== 0)
    {
        Serial.println("Connected to AWS");
        delay(1000);

        if(0==hornbill.subscribe(TOPIC_NAME,mySubCallBackHandler))
        {
            Serial.println("Subscribe Successfull");
        }
        else
        {
            Serial.println("Subscribe Failed, Check the Thing Name and Certificates");
            while(1);
        }
    }

     else
    {
        Serial.println("AWS connection failed, Check the HOST Address");
        while(1);
    }

    delay(2000);

}



void loop() {
   switch(_step){ 
   case 0: 
     digitalWrite(Pin1, LOW);  
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, LOW); 
     digitalWrite(Pin4, HIGH); 
   break;  
   case 1: 
     digitalWrite(Pin1, LOW);  
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, HIGH); 
     digitalWrite(Pin4, HIGH); 
   break;  
   case 2: 
     digitalWrite(Pin1, LOW);  
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, HIGH); 
     digitalWrite(Pin4, LOW); 
   break;  
   case 3: 
     digitalWrite(Pin1, LOW);  
     digitalWrite(Pin2, HIGH); 
     digitalWrite(Pin3, HIGH); 
     digitalWrite(Pin4, LOW); 
   break;  
   case 4: 
     digitalWrite(Pin1, LOW);  
     digitalWrite(Pin2, HIGH); 
     digitalWrite(Pin3, LOW); 
     digitalWrite(Pin4, LOW); 
   break;  
   case 5: 
     digitalWrite(Pin1, HIGH);  
     digitalWrite(Pin2, HIGH); 
     digitalWrite(Pin3, LOW); 
     digitalWrite(Pin4, LOW); 
   break;  
     case 6: 
     digitalWrite(Pin1, HIGH);  
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, LOW); 
     digitalWrite(Pin4, LOW); 
   break;  
   case 7: 
     digitalWrite(Pin1, HIGH);  
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, LOW); 
     digitalWrite(Pin4, HIGH); 
   break;  
   default: 
     digitalWrite(Pin1, LOW);  
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, LOW); 
     digitalWrite(Pin4, LOW); 
   break;  
 } 

    if(msgReceived == 1)
    {
        msgReceived = 0;
        Serial.print("Received Message:");
        Serial.println(rcvdPayload);
    }
    
    if(dirStatus == 49){ 
      _step++; 
    }
    else if(dirStatus == 50) { 
      _step--; 
    } 
    if(_step>7){ 
      _step=0; 
    } 
    if(_step<0){ 
      _step=7; 
    } 
    delay(1); 
}