diff --git a/examples/sPSN_PingTest/sPSN_PingTest.ino b/examples/sPSN_PingTest/sPSN_PingTest.ino
new file mode 100644
index 0000000000000000000000000000000000000000..03f7594556151735e92def76407c3ca8c2ca223f
--- /dev/null
+++ b/examples/sPSN_PingTest/sPSN_PingTest.ino
@@ -0,0 +1,114 @@
+/**
+  file:  sPSN_HWTest
+  author:  letsgoING -> info@letsgoing.de
+
+  description:
+   Test-Software um Clients im Netzwerk "anzumelden"
+
+  date:  01.12.2021
+*/
+
+/**
+ *file:  sPSN_PingTest
+ *author:  letsgoING -> info@letsgoing.de
+ *
+ *description:
+ * Test-Software um Clients im Netzwerk "anzumelden"
+ * Für das Netwerk werden min. 3 Arduinos mit IR-Link-Modulen benötigt:
+ *
+ * Arduino1: sPSN_Broker.ino
+ * 
+ * Arduino2: sPSN_PongTester.ino -> fragt Clients ab
+ * 
+ * Arduino3: sPSN_PingTest.ino -> reagiert auf PongTester
+ * 
+ *date:  01.12.2021
+ */
+
+#include "Arduino.h"
+
+#include "SoftwareSerial.h"
+#include "didacticNet.h"
+
+//lege Geschwindigkeit für serielle Schnittstellen fest
+#define SERIAL_BAUD 2400
+
+//HIER CLIENT-NUMMER ANPASSEN
+//*******************************
+#define MY_NUMBER  1
+//*******************************
+
+#define LED_PIN    5
+#define LED2_PIN   6
+#define BUTTON_PIN 2
+
+
+//lege Pins für SoftwareSerielle Schnittstelle fest
+// Rx = 10 -> Empfänger | Tx = 11 -> Sender
+SoftwareSerial sSerial(10, 11);
+
+//Erzeuge Client-Instanz
+DidacticPSNetClient psnClient;
+
+EdgeDetector eDetector;
+
+//Arrays für Empfangs- und Sende Topic
+char topicSub[MAX_LEN_TOPICS] = "";
+char topicPub[MAX_LEN_TOPICS] = "";
+
+char payloadSend[] = "Ping";
+
+bool ledState = true;
+
+void myCallback(char* mTopic, int mToLength, char* mData, int mDaLength) {
+  Serial.println(mData);
+  digitalWrite(LED_BUILTIN, HIGH);
+}
+
+
+void setup() {
+  //Starte Serielle Schnittstelle (zum PC)
+  Serial.begin(SERIAL_BAUD);
+  delay(2000);
+
+  sprintf(topicPub, "%02d", MY_NUMBER);
+  sprintf(topicSub, "%02d", MY_NUMBER);
+
+  Serial.print("\nStarting sPSNet as Client ");
+  Serial.println(topicPub);
+
+
+  //Starte SoftwareSerielle Schnittstelle (zu IR-Link-Modulen)
+  sSerial.begin(SERIAL_BAUD);
+
+  pinMode(LED_BUILTIN, OUTPUT);
+  pinMode(LED_PIN, OUTPUT);
+  pinMode(LED2_PIN, OUTPUT);
+
+  digitalWrite(LED_BUILTIN, LOW);
+  digitalWrite(LED_PIN, ledState);
+  digitalWrite(LED2_PIN, ledState);
+
+  psnClient.begin(sSerial, myCallback);
+
+  psnClient.publish(topicPub, payloadSend);
+  while (!psnClient.handleNetwork());
+
+  psnClient.subscribe(topicSub);
+  while (!psnClient.handleNetwork());
+
+  psnClient.setInterval(10000L);
+}
+
+void loop() {
+  //Verarbeiten der Daten, prüfen ob Netzwerk frei und versenden der Daten
+  psnClient.handleNetwork();
+
+  psnClient.publish(topicPub, payloadSend);
+
+  if (eDetector.edgeDetected(digitalRead(BUTTON_PIN)) == RISING) {
+    ledState = !ledState;
+    digitalWrite(LED_PIN, !ledState);
+    digitalWrite(LED2_PIN, ledState);
+  }
+}
diff --git a/examples/sPSN_PongTester/sPSN_PongTester.ino b/examples/sPSN_PongTester/sPSN_PongTester.ino
new file mode 100644
index 0000000000000000000000000000000000000000..bddbb0f9f95248e967c2bb387d899600e7140c44
--- /dev/null
+++ b/examples/sPSN_PongTester/sPSN_PongTester.ino
@@ -0,0 +1,93 @@
+
+/**
+ *file:  sPSN_PongTester
+ *author:  letsgoING -> info@letsgoing.de
+ *
+ *description:
+ * Test-Software um Clients im Netzwerk "anzumelden"
+ * Für das Netwerk werden min. 3 Arduinos mit IR-Link-Modulen benötigt:
+ *
+ * Arduino1: sPSN_Broker.ino
+ * 
+ * Arduino2: sPSN_PongTester.ino -> fragt Clients ab
+ * 
+ * Arduino3: sPSN_PingTest.ino -> reagiert auf PongTester
+ * 
+ *date:  01.12.2021
+ */
+
+#include "Arduino.h"
+
+#include "SoftwareSerial.h"
+#include "didacticNet.h"
+
+//lege Geschwindigkeit für serielle Schnittstellen fest
+#define SERIAL_BAUD 2400
+
+//HIER CLIENT_ZAHL ANPASSEN
+//*******************************
+#define MAX_NR_CLIENTS 15
+//*******************************
+
+//lege Pins für SoftwareSerielle Schnittstelle fest
+// Rx = 10 -> Empfänger | Tx = 11 -> Sender
+SoftwareSerial sSerial(10, 11);
+
+//Erzeuge Client-Instanz
+DidacticPSNetClient psnClient;
+
+//Arrays für Empfangs- und Sende Topic
+char topicSub[MAX_LEN_TOPICS] = "";
+char topicPub[MAX_LEN_TOPICS] = "";
+
+char payloadSend[] = "Pong";
+
+bool ledState = true;
+
+void myCallback(char* mTopic, int mToLength, char* mData, int mDaLength) {
+  Serial.println(mTopic);
+  //reply pong
+  strcpy(topicPub, mTopic);
+  if (!strcmp(mData, "Ping")) {
+    Serial.print(" ");
+    Serial.println(mTopic);
+    psnClient.publish(topicPub, payloadSend);
+  }
+}
+
+
+void setup() {
+  //Starte Serielle Schnittstelle (zum PC)
+  Serial.begin(SERIAL_BAUD);
+  delay(2000);
+
+  Serial.print("\nSearching for ");
+  Serial.print(MAX_NR_CLIENTS);
+  Serial.println(" sPSNet-Clients");
+
+  //Starte SoftwareSerielle Schnittstelle (zu IR-Link-Modulen)
+  sSerial.begin(SERIAL_BAUD);
+
+  pinMode(LED_BUILTIN, OUTPUT);
+  digitalWrite(LED_BUILTIN, LOW);
+
+  psnClient.begin(sSerial, myCallback);
+
+  //psnClient.subscribe("*");
+  Serial.println("Topics: ");
+  for (int clientNr = 0; clientNr < MAX_NR_CLIENTS; ++clientNr) {
+    sprintf(topicSub, "%02d", clientNr);
+    psnClient.subscribe(topicSub);
+    while (!psnClient.handleNetwork());
+    Serial.print(topicSub);
+    Serial.print(" ");
+  }
+
+  Serial.println("\n\nReady for Clients...");
+
+}
+
+void loop() {
+  //Verarbeiten der Daten, prüfen ob Netzwerk frei und versenden der Daten
+  psnClient.handleNetwork();
+}
diff --git a/src/didacticNet.h b/src/didacticNet.h
index cf3b998c828dbbf53e5c6d77ffff7976f40ccad3..6da192282afb0d053a9f5372a80793af8c0729e0 100644
--- a/src/didacticNet.h
+++ b/src/didacticNet.h
@@ -34,7 +34,7 @@
 #define INTERVAL_CLIENT	   500L
 #define INTERVAL_BROKER	     0L
 
-#define MAX_NR_TOPICS_CLIENT   5
+#define MAX_NR_TOPICS_CLIENT  20
 #define MAX_NR_TOPICS_BROKER  20
 #define MAX_LEN_TOPICS 		  10
 #define MAX_LEN_PAYLOAD       20