diff --git a/platform/cooja/dev/button-sensor.c b/platform/cooja/dev/button-sensor.c
index 85c11f078..8d9b343be 100644
--- a/platform/cooja/dev/button-sensor.c
+++ b/platform/cooja/dev/button-sensor.c
@@ -26,7 +26,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $Id: button-sensor.c,v 1.5 2010/01/14 16:13:45 joxe Exp $
+ * $Id: button-sensor.c,v 1.6 2010/01/14 19:12:31 nifi Exp $
  */
 
 #include "lib/sensors.h"
@@ -42,7 +42,7 @@ char simButtonChanged;
 char simButtonIsDown;
 char simButtonIsActive;
 /*---------------------------------------------------------------------------*/
-static unsigned int
+static int
 value(int type)
 {
   return simButtonIsDown || !timer_expired(&debouncetimer);
@@ -53,9 +53,11 @@ configure(int type, int c)
 {
   if(type == SENSORS_ACTIVE) {
     simButtonIsActive = c;
+    return 1;
   } else if(type == SENSORS_HW_INIT) {
     simButtonIsActive = 1;
     timer_set(&debouncetimer, 0);
+    return 1;
   }
   return 0;
 }
diff --git a/platform/cooja/dev/pir-sensor.c b/platform/cooja/dev/pir-sensor.c
index 73842a90b..39dc4bbcd 100644
--- a/platform/cooja/dev/pir-sensor.c
+++ b/platform/cooja/dev/pir-sensor.c
@@ -26,10 +26,9 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $Id: pir-sensor.c,v 1.1 2006/08/21 12:11:18 fros4943 Exp $
+ * $Id: pir-sensor.c,v 1.2 2010/01/14 19:12:31 nifi Exp $
  */
 
-#include "lib/sensors.h"
 #include "dev/pir-sensor.h"
 #include "lib/simEnvChange.h"
 
@@ -41,53 +40,36 @@ char simPirChanged;
 char simPirIsActive;
 char simPirValue = 0;
 
-/*---------------------------------------------------------------------------*/
-static void
-init(void)
-{
-  simPirIsActive = 1;
-}
 /*---------------------------------------------------------------------------*/
 static int
-irq(void)
-{
-  return 0;
-}
-/*---------------------------------------------------------------------------*/
-static void
-activate(void)
-{
-  simPirIsActive = 1;
-}
-/*---------------------------------------------------------------------------*/
-static void
-deactivate(void)
-{
-  simPirIsActive = 0;
-}
-/*---------------------------------------------------------------------------*/
-static int
-active(void)
-{
-  return simPirIsActive;
-}
-/*---------------------------------------------------------------------------*/
-static unsigned int
 value(int type)
 {
   return simPirValue;
 }
 /*---------------------------------------------------------------------------*/
 static int
-configure(int type, void *c)
+configure(int type, int c)
 {
+  switch(type) {
+  case SENSORS_HW_INIT:
+    simPirIsActive = 0;
+    return 1;
+  case SENSORS_ACTIVE:
+    simPirIsActive = c;
+    return 1;
+  }
   return 0;
 }
 /*---------------------------------------------------------------------------*/
-static void *
+static int
 status(int type)
 {
-  return NULL;
+  switch(type) {
+  case SENSORS_ACTIVE:
+  case SENSORS_READY:
+    return simPirIsActive;
+  }
+  return 0;
 }
 /*---------------------------------------------------------------------------*/
 static void
@@ -95,7 +77,7 @@ doInterfaceActionsBeforeTick(void)
 {
   // Check if PIR value has changed
   if (simPirIsActive && simPirChanged) {
-    simPirValue = !simPirValue;
+    simPirValue++;
 
     sensors_changed(&pir_sensor);
     simPirChanged = 0;
@@ -113,5 +95,4 @@ SIM_INTERFACE(pir_interface,
 	doInterfaceActionsAfterTick);
 
 SENSORS_SENSOR(pir_sensor, PIR_SENSOR,
-	       init, irq, activate, deactivate, active,
-	       value, configure, status);
+               value, configure, status);
diff --git a/platform/cooja/dev/pir-sensor.h b/platform/cooja/dev/pir-sensor.h
index e3aa95ea4..bb27d8488 100644
--- a/platform/cooja/dev/pir-sensor.h
+++ b/platform/cooja/dev/pir-sensor.h
@@ -26,12 +26,14 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $Id: pir-sensor.h,v 1.1 2006/08/21 12:11:19 fros4943 Exp $
+ * $Id: pir-sensor.h,v 1.2 2010/01/14 19:12:31 nifi Exp $
  */
 
 #ifndef __PIR_H__
 #define __PIR_H__
 
+#include "lib/sensors.h"
+
 extern const struct sensors_sensor pir_sensor;
 
 #define PIR_SENSOR "PIR"
diff --git a/platform/cooja/dev/radio-sensor.c b/platform/cooja/dev/radio-sensor.c
index c06c0a21b..ffb2a9b0f 100644
--- a/platform/cooja/dev/radio-sensor.c
+++ b/platform/cooja/dev/radio-sensor.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * @(#)$Id: radio-sensor.c,v 1.3 2007/05/29 12:27:00 fros4943 Exp $
+ * @(#)$Id: radio-sensor.c,v 1.4 2010/01/14 19:12:31 nifi Exp $
  */
 
 #include "lib/sensors.h"
@@ -40,54 +40,29 @@ const struct sensors_sensor radio_sensor;
 
 extern int simSignalStrength;
 
-// COOJA variables (none - no corresponding part in Java)
-
-/*---------------------------------------------------------------------------*/
-static void
-init(void)
-{
-}
 /*---------------------------------------------------------------------------*/
 static int
-irq(void)
-{
-  return 0;
-}
-/*---------------------------------------------------------------------------*/
-static void
-activate(void)
-{
-}
-/*---------------------------------------------------------------------------*/
-static void
-deactivate(void)
-{
-}
-/*---------------------------------------------------------------------------*/
-static int
-active(void)
-{
-  return 0;
-}
-/*---------------------------------------------------------------------------*/
-static unsigned int
 value(int type)
 {
   return simSignalStrength;
 }
 /*---------------------------------------------------------------------------*/
 static int
-configure(int type, void *c)
+configure(int type, int c)
 {
   return 0;
 }
 /*---------------------------------------------------------------------------*/
-static void *
+static int
 status(int type)
 {
-  return NULL;
+  switch(type) {
+  case SENSORS_ACTIVE:
+  case SENSORS_READY:
+    return 1;
+  }
+  return 0;
 }
 /*---------------------------------------------------------------------------*/
 SENSORS_SENSOR(radio_sensor, RADIO_SENSOR,
-	       init, irq, activate, deactivate, active,
-	       value, configure, status);
+               value, configure, status);
diff --git a/platform/cooja/dev/vib-sensor.c b/platform/cooja/dev/vib-sensor.c
index 3228c8e1e..c94512dca 100644
--- a/platform/cooja/dev/vib-sensor.c
+++ b/platform/cooja/dev/vib-sensor.c
@@ -26,10 +26,9 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $Id: vib-sensor.c,v 1.1 2006/08/21 12:11:18 fros4943 Exp $
+ * $Id: vib-sensor.c,v 1.2 2010/01/14 19:12:31 nifi Exp $
  */
 
-#include "lib/sensors.h"
 #include "dev/vib-sensor.h"
 #include "lib/simEnvChange.h"
 
@@ -41,53 +40,36 @@ char simVibChanged;
 char simVibIsActive;
 char simVibValue = 0;
 
-/*---------------------------------------------------------------------------*/
-static void
-init(void)
-{
-  simVibIsActive = 1;
-}
 /*---------------------------------------------------------------------------*/
 static int
-irq(void)
-{
-  return 0;
-}
-/*---------------------------------------------------------------------------*/
-static void
-activate(void)
-{
-  simVibIsActive = 1;
-}
-/*---------------------------------------------------------------------------*/
-static void
-deactivate(void)
-{
-  simVibIsActive = 0;
-}
-/*---------------------------------------------------------------------------*/
-static int
-active(void)
-{
-  return simVibIsActive;
-}
-/*---------------------------------------------------------------------------*/
-static unsigned int
 value(int type)
 {
   return simVibValue;
 }
 /*---------------------------------------------------------------------------*/
 static int
-configure(int type, void *c)
+configure(int type, int c)
 {
+  switch(type) {
+  case SENSORS_HW_INIT:
+    simVibIsActive = 0;
+    return 1;
+  case SENSORS_ACTIVE:
+    simVibIsActive = c;
+    return 1;
+  }
   return 0;
 }
 /*---------------------------------------------------------------------------*/
-static void *
+static int
 status(int type)
 {
-  return NULL;
+  switch(type) {
+  case SENSORS_ACTIVE:
+  case SENSORS_READY:
+    return simVibIsActive;
+  }
+  return 0;
 }
 /*---------------------------------------------------------------------------*/
 static void
@@ -95,7 +77,7 @@ doInterfaceActionsBeforeTick(void)
 {
   // Check if Vib value has changed
   if (simVibIsActive && simVibChanged) {
-    simVibValue = !simVibValue;
+    simVibValue++;
 
     sensors_changed(&vib_sensor);
     simVibChanged = 0;
@@ -113,5 +95,4 @@ SIM_INTERFACE(vib_interface,
 	doInterfaceActionsAfterTick);
 
 SENSORS_SENSOR(vib_sensor, VIB_SENSOR,
-	       init, irq, activate, deactivate, active,
-	       value, configure, status);
+               value, configure, status);
diff --git a/platform/cooja/dev/vib-sensor.h b/platform/cooja/dev/vib-sensor.h
index beaa05e5f..c72e13bea 100644
--- a/platform/cooja/dev/vib-sensor.h
+++ b/platform/cooja/dev/vib-sensor.h
@@ -26,12 +26,14 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $Id: vib-sensor.h,v 1.1 2006/08/21 12:11:18 fros4943 Exp $
+ * $Id: vib-sensor.h,v 1.2 2010/01/14 19:12:31 nifi Exp $
  */
 
 #ifndef __VIB_H__
 #define __VIB_H__
 
+#include "lib/sensors.h"
+
 extern const struct sensors_sensor vib_sensor;
 
 #define VIB_SENSOR "Vibration sensor"