diff --git a/pom.xml b/pom.xml
index 5852ece..b998e33 100644
--- a/pom.xml
+++ b/pom.xml
@@ -50,7 +50,7 @@
             <url>https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/</url>
         </repository>
     </distributionManagement>
-    
+            
     <repositories>
         <repository>
             <id>jitpack.io</id>
@@ -125,6 +125,7 @@
                     <autoReleaseAfterClose>true</autoReleaseAfterClose>
                 </configuration>
             </plugin>
+
              <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-gpg-plugin</artifactId>
diff --git a/src/main/java/dlt/client/tangle/model/LedgerReader.java b/src/main/java/dlt/client/tangle/model/LedgerReader.java
index d657895..8f908e4 100644
--- a/src/main/java/dlt/client/tangle/model/LedgerReader.java
+++ b/src/main/java/dlt/client/tangle/model/LedgerReader.java
@@ -92,7 +92,6 @@ private void notifyAll(String topic, Object object) {
         if (topic != null && !topic.isEmpty()) {
             Set<ILedgerSubscriber> subscribers = this.topics.get(topic);
             if (subscribers != null && !subscribers.isEmpty()) {
-
                 subscribers.forEach(sub -> sub.update(object));
             }
         }
diff --git a/src/main/java/dlt/client/tangle/model/LedgerWriter.java b/src/main/java/dlt/client/tangle/model/LedgerWriter.java
index 12c4721..1e4dde9 100644
--- a/src/main/java/dlt/client/tangle/model/LedgerWriter.java
+++ b/src/main/java/dlt/client/tangle/model/LedgerWriter.java
@@ -5,6 +5,7 @@
 import com.google.gson.JsonParser;
 import com.google.gson.stream.JsonReader;
 import dlt.client.tangle.enums.TransactionType;
+import dlt.client.tangle.model.transactions.LBDevice;
 import dlt.client.tangle.model.transactions.LBReply;
 import dlt.client.tangle.model.transactions.Reply;
 import dlt.client.tangle.model.transactions.Request;
@@ -23,6 +24,7 @@
 import org.iota.jota.model.Transfer;
 import org.iota.jota.utils.SeedRandomGenerator;
 import org.iota.jota.utils.TrytesConverter;
+import java.util.logging.Logger;
 
 /**
  *
@@ -40,6 +42,7 @@ public class LedgerWriter implements ILedgerWriter, Runnable {
   private final int minimumWeightMagnitude;
   private final int securityLevel;
   private String url;
+  private static final Logger logger = Logger.getLogger(LedgerWriter.class.getName());
 
   public LedgerWriter(
     String protocol,
@@ -111,8 +114,8 @@ public Transaction getTransactionByHash(String hashTransaction) {
   }
 
   private Transaction getTypeTransaction(String transactionJSON) {
-    System.out.println("JSON Message");
-    System.out.println(transactionJSON);
+    logger.info("JSON Message");
+    logger.info(transactionJSON);
 
     JsonParser jsonparser = new JsonParser();
     JsonReader reader = new JsonReader(new StringReader(transactionJSON));
@@ -137,9 +140,10 @@ private Transaction getTypeTransaction(String transactionJSON) {
       return gson.fromJson(reader, Request.class);
     } else if (type.equals(TransactionType.LB_STATUS.name())) {
       return gson.fromJson(reader, Status.class);
+    } else {
+      return gson.fromJson(reader, LBDevice.class);
     }
 
-    return null;
   }
 
   private void writeToTangle(String tagGroup, String message) {
@@ -169,7 +173,7 @@ private void writeToTangle(String tagGroup, String message) {
         null
       );
     } catch (ArgumentException e) {
-      System.out.println("Error in arguments!");
+      logger.info("Error in arguments!");
       e.printStackTrace();
     }
   }
diff --git a/src/main/java/dlt/client/tangle/model/ZMQServer.java b/src/main/java/dlt/client/tangle/model/ZMQServer.java
index bd84766..c7c84e7 100644
--- a/src/main/java/dlt/client/tangle/model/ZMQServer.java
+++ b/src/main/java/dlt/client/tangle/model/ZMQServer.java
@@ -19,6 +19,7 @@ public class ZMQServer implements Runnable {
   private ZMQ.Socket serverListener;
   private String socketURL;
   private String address;
+  private static final Logger logger = Logger.getLogger(ZMQServer.class.getName());
 
   public ZMQServer(
     int bufferSize,
@@ -36,7 +37,7 @@ public ZMQServer(
 
   public void start() {
     if (this.serverThread == null) {
-      System.out.println("Socket URL: " + this.socketURL);
+      logger.info("Socket URL: " + this.socketURL);
 
       this.serverListener.connect(this.socketURL);
       this.serverThread = new Thread(this);
@@ -51,7 +52,7 @@ public void stop() {
   }
 
   public void subscribe(String topic) {
-    System.out.println("Subscribe: " + topic);
+    logger.info("Subscribe: " + topic);
     this.serverListener.subscribe(topic);
   }
 
@@ -65,7 +66,8 @@ public String take() throws InterruptedException {
 
   @Override
   public void run() {
-    System.out.println("Address: " + address);
+    logger.info("Address: " + address);
+    
     while (!this.serverThread.isInterrupted()) {
       byte[] reply = serverListener.recv(0);
       String[] data = (new String(reply).split(" "));
@@ -82,7 +84,7 @@ private void putReceivedMessageBuffer(String receivedMessage) {
     try {
       this.DLTInboundBuffer.put(receivedMessage);
     } catch (InterruptedException ex) {
-      Logger.getLogger(ZMQServer.class.getName()).log(Level.SEVERE, null, ex);
+      logger.log(Level.SEVERE, null, ex);
     }
   }
 }
diff --git a/src/main/java/dlt/client/tangle/model/transactions/Status.java b/src/main/java/dlt/client/tangle/model/transactions/Status.java
index 112c5cc..ae76d7d 100644
--- a/src/main/java/dlt/client/tangle/model/transactions/Status.java
+++ b/src/main/java/dlt/client/tangle/model/transactions/Status.java
@@ -27,7 +27,7 @@ public double getLastLoad() {
         return lastLoad;
     }
     
-    public boolean getAvaible() {
+    public boolean getAvailable() {
     	return available;
     }
     
diff --git a/src/main/java/dlt/client/tangle/model/transactions/Transaction.java b/src/main/java/dlt/client/tangle/model/transactions/Transaction.java
index 2e8f6f9..ee058b8 100644
--- a/src/main/java/dlt/client/tangle/model/transactions/Transaction.java
+++ b/src/main/java/dlt/client/tangle/model/transactions/Transaction.java
@@ -45,4 +45,15 @@ public final void setPublishedAt(long publishedAt) {
     public final long getPublishedAt() {
         return this.publishedAt;
     }
+
+    @Override
+    public String toString() {
+      return new StringBuilder("Transaction: ")
+        .append(this.source)
+        .append(this.group)
+        .append(this.type)
+        .append(this.createdAt)
+        .append(this.publishedAt)
+        .toString();
+    }
 }