diff --git a/src/se/hal/plugin/raspberry/RPiPowerConsumptionSensor.java b/src/se/hal/plugin/raspberry/RPiPowerConsumptionSensor.java
index 5341a137..13e07123 100644
--- a/src/se/hal/plugin/raspberry/RPiPowerConsumptionSensor.java
+++ b/src/se/hal/plugin/raspberry/RPiPowerConsumptionSensor.java
@@ -11,8 +11,12 @@ public class RPiPowerConsumptionSensor implements PowerConsumptionSensorData {
 	@Configurator.Configurable("GPIO-Pin")
     private int gpioPin = -1;
 	
-	private final double data;
-	private final long timestamp;
+	private double data;
+	private long timestamp;
+	
+	public RPiPowerConsumptionSensor(){
+		//need to be empty for the framework to create an instance
+	}
 	
 	public RPiPowerConsumptionSensor(long timestamp, double data) {
 		this.timestamp = timestamp;
diff --git a/src/se/hal/plugin/raspberry/RPiTemperatureSensor.java b/src/se/hal/plugin/raspberry/RPiTemperatureSensor.java
index 8693dbb5..f090a079 100644
--- a/src/se/hal/plugin/raspberry/RPiTemperatureSensor.java
+++ b/src/se/hal/plugin/raspberry/RPiTemperatureSensor.java
@@ -9,8 +9,12 @@ public class RPiTemperatureSensor implements TemperatureSensorData {
 	@Configurator.Configurable("1-Wire Address")
     private String w1Address = null;
 	
-	private final double data;
-	private final long timestamp;
+	private double data;
+	private long timestamp;
+	
+	public RPiTemperatureSensor(){
+		//need to be empty for the framework to create an instance
+	}
 	
 	public RPiTemperatureSensor(long timestamp, double data) {
 		this.timestamp = timestamp;