diff --git a/src/SenseBoxBLE.cpp b/src/SenseBoxBLE.cpp
index cc19d09..9068862 100755
--- a/src/SenseBoxBLE.cpp
+++ b/src/SenseBoxBLE.cpp
@@ -145,6 +145,7 @@ void SenseBoxBLE::poll(int timeout)
   *
   */
 void SenseBoxBLE::poll(){
+    memset(configCharValue, 0, sizeof(configCharValue));
     if(port.poll()){
       if(parseMyValue(configCharValue,port.checkCharWritten(h_configCharacteristic))){
             configCharacteristicWritten();
@@ -243,4 +244,4 @@ bool SenseBoxBLE::write(int characteristic, float& f1, float& f2, float& f3 , fl
   return port.writeValue(characteristic,data,20);
 }
 
-//#endif
\ No newline at end of file
+//#endif