diff --git a/platform/cooja/dev/cooja-radio.c b/platform/cooja/dev/cooja-radio.c
index 3d6225049..1f2bd36d7 100644
--- a/platform/cooja/dev/cooja-radio.c
+++ b/platform/cooja/dev/cooja-radio.c
@@ -26,7 +26,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $Id: cooja-radio.c,v 1.1 2007/05/18 13:48:16 fros4943 Exp $
+ * $Id: cooja-radio.c,v 1.2 2007/05/18 15:20:21 fros4943 Exp $
  */
 
 #include <string.h>
@@ -54,6 +54,7 @@ int simOutSize;
 
 char simRadioHWOn = 1;
 int simSignalStrength = -200;
+int simLastSignalStrength = -200;
 char simPower = 100;
 int simRadioChannel = 1;
 int inSendFunction = 0;
@@ -98,6 +99,12 @@ radio_set_channel(int channel)
 /*-----------------------------------------------------------------------------------*/
 int
 radio_sstrength(void)
+{
+  return simLastSignalStrength;
+}
+/*-----------------------------------------------------------------------------------*/
+int
+radio_current_sstrength(void)
 {
   return simSignalStrength;
 }
@@ -121,6 +128,7 @@ doInterfaceActionsBeforeTick(void)
   
   // Don't fall asleep while receiving (in main file)
   if (simReceiving) {
+    simLastSignalStrength = simSignalStrength;
     simDontFallAsleep = 1;
     return;
   }
diff --git a/platform/cooja/dev/cooja-radio.h b/platform/cooja/dev/cooja-radio.h
index 7e9d2268e..9ad2c6f07 100644
--- a/platform/cooja/dev/cooja-radio.h
+++ b/platform/cooja/dev/cooja-radio.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: cooja-radio.h,v 1.1 2007/05/18 13:48:30 fros4943 Exp $
+ * $Id: cooja-radio.h,v 1.2 2007/05/18 15:20:20 fros4943 Exp $
  */
 
 #ifndef __COOJA_RADIO_H__
@@ -102,10 +102,15 @@ u16_t
 radio_read(u8_t *buf, u16_t bufsize);
 
 /**
- * This function returns the recevied signal strength of the last
+ * This function returns the signal strength of the last
  * received packet. This function typically is called when a packet
  * has been received.
  */
 int radio_sstrength(void);
 
+/**
+ * This function measures and returns the signal strength.
+ */
+int radio_current_sstrength(void);
+
 #endif /* __COOJA_RADIO_H__ */