diff --git a/src/HomeSpan.h b/src/HomeSpan.h
index c08ba0f..e873410 100644
--- a/src/HomeSpan.h
+++ b/src/HomeSpan.h
@@ -532,7 +532,7 @@ class SpanCharacteristic{
         return(String(c));        
       case FORMAT::STRING:
       case FORMAT::DATA:
-        sprintf(c,"\"%s\"",u.STRING);
+        sprintf(c,"\"%.61s\"",u.STRING); // Truncating string to 61 chars.
         return(String(c));        
     } // switch
     return(String());       // included to prevent compiler warnings