diff --git a/examples/binary-sensor/binary-sensor.ino b/examples/binary-sensor/binary-sensor.ino
index 89f878e..a39fd39 100644
--- a/examples/binary-sensor/binary-sensor.ino
+++ b/examples/binary-sensor/binary-sensor.ino
@@ -1,7 +1,8 @@
 #include <Ethernet.h>
 #include <ArduinoHA.h>
 
-#define INPUT_PIN 9
+#define INPUT_PIN       9
+#define BROKER_ADDR     IPAddress(192,168,0,17)
 
 byte mac[] = {0x00, 0x10, 0xFA, 0x6E, 0x38, 0x4A};
 unsigned long lastReadAt = millis();
@@ -24,7 +25,7 @@ void setup() {
     device.setSoftwareVersion("1.0.0");
 
     // please change IP address to yours
-    mqtt.begin(IPAddress(192,168,0,17));
+    mqtt.begin(BROKER_ADDR);
 }
 
 void loop() {
diff --git a/examples/led-switch/led-switch.ino b/examples/led-switch/led-switch.ino
index 2c091f0..4156cd4 100644
--- a/examples/led-switch/led-switch.ino
+++ b/examples/led-switch/led-switch.ino
@@ -1,7 +1,8 @@
 #include <Ethernet.h>
 #include <ArduinoHA.h>
 
-#define LED_PIN 9
+#define LED_PIN         9
+#define BROKER_ADDR     IPAddress(192,168,0,17)
 
 byte mac[] = {0x00, 0x10, 0xFA, 0x6E, 0x38, 0x4A};
 
@@ -30,7 +31,7 @@ void setup() {
     led.onStateChanged(onSwitchStateChanged);
 
     // please change IP address to yours
-    mqtt.begin(IPAddress(192,168,0,17));
+    mqtt.begin(BROKER_ADDR);
 }
 
 void loop() {
diff --git a/examples/mqtt-with-credentials/mqtt-with-credentials.ino b/examples/mqtt-with-credentials/mqtt-with-credentials.ino
index bd65d45..d4a1399 100644
--- a/examples/mqtt-with-credentials/mqtt-with-credentials.ino
+++ b/examples/mqtt-with-credentials/mqtt-with-credentials.ino
@@ -1,9 +1,10 @@
 #include <Ethernet.h>
 #include <ArduinoHA.h>
 
-#define LED_PIN 9
-#define USERNAME "user" // replace with your credentials
-#define PASSWORD "pass"
+#define LED_PIN             9
+#define BROKER_ADDR         IPAddress(192,168,0,17)
+#define BROKER_USERNAME     "user" // replace with your credentials
+#define BROKER_PASSWORD     "pass"
 
 byte mac[] = {0x00, 0x10, 0xFA, 0x6E, 0x38, 0x4A};
 
@@ -32,7 +33,7 @@ void setup() {
     led.onStateChanged(onSwitchStateChanged);
 
     // please change IP address to yours
-    mqtt.begin(IPAddress(192,168,0,17), USERNAME, PASSWORD);
+    mqtt.begin(BROKER_ADDR, BROKER_USERNAME, BROKER_PASSWORD);
 }
 
 void loop() {
diff --git a/examples/sensor/sensor.ino b/examples/sensor/sensor.ino
index 981f86d..08118a4 100644
--- a/examples/sensor/sensor.ino
+++ b/examples/sensor/sensor.ino
@@ -1,6 +1,8 @@
 #include <Ethernet.h>
 #include <ArduinoHA.h>
 
+#define BROKER_ADDR IPAddress(192,168,0,17)
+
 byte mac[] = {0x00, 0x10, 0xFA, 0x6E, 0x38, 0x4A};
 unsigned long lastSentAt = millis();
 double lastValue = 0;
@@ -34,7 +36,7 @@ void setup() {
     temp.setUnitOfMeasurement("°C");
 
     // please change IP address to yours
-    mqtt.begin(IPAddress(192,168,0,17));
+    mqtt.begin(BROKER_ADDR);
 }
 
 void loop() {