diff --git a/bundles/org.openhab.binding.tellstick/src/main/java/org/openhab/binding/tellstick/internal/local/dto/TellstickLocalDeviceDTO.java b/bundles/org.openhab.binding.tellstick/src/main/java/org/openhab/binding/tellstick/internal/local/dto/TellstickLocalDeviceDTO.java
index 1480245147ce..56bc57c86901 100644
--- a/bundles/org.openhab.binding.tellstick/src/main/java/org/openhab/binding/tellstick/internal/local/dto/TellstickLocalDeviceDTO.java
+++ b/bundles/org.openhab.binding.tellstick/src/main/java/org/openhab/binding/tellstick/internal/local/dto/TellstickLocalDeviceDTO.java
@@ -112,4 +112,21 @@ public String getType() {
     public void setType(String type) {
         this.type = type;
     }
+
+    @Override
+    public boolean equals(Object obj) {
+        // used to test if device exist
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof TellstickLocalDeviceDTO other)) {
+            return false;
+        }
+        return deviceId == other.deviceId;
+    }
+
+    @Override
+    public int hashCode() {
+        return deviceId;
+    }
 }
diff --git a/bundles/org.openhab.binding.tellstick/src/main/java/org/openhab/binding/tellstick/internal/local/dto/TellstickLocalSensorDTO.java b/bundles/org.openhab.binding.tellstick/src/main/java/org/openhab/binding/tellstick/internal/local/dto/TellstickLocalSensorDTO.java
index b3a754d105b0..5dd173271688 100644
--- a/bundles/org.openhab.binding.tellstick/src/main/java/org/openhab/binding/tellstick/internal/local/dto/TellstickLocalSensorDTO.java
+++ b/bundles/org.openhab.binding.tellstick/src/main/java/org/openhab/binding/tellstick/internal/local/dto/TellstickLocalSensorDTO.java
@@ -127,4 +127,21 @@ public void setSensorId(int sensorId) {
     public String getUUId() {
         return Integer.toString(deviceId);
     }
+
+    @Override
+    public boolean equals(Object obj) {
+        // used to test if sensor exist
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof TellstickLocalSensorDTO other)) {
+            return false;
+        }
+        return deviceId == other.deviceId;
+    }
+
+    @Override
+    public int hashCode() {
+        return deviceId;
+    }
 }