Index: webserver/example/EnergyMeters/Source/EnergyMeters/SolarCountUART.c
===================================================================
--- webserver/example/EnergyMeters/Source/EnergyMeters/SolarCountUART.c (revision 70)
+++ webserver/example/EnergyMeters/Source/EnergyMeters/SolarCountUART.c (revision 71)
@@ -270,5 +270,5 @@
   for (i = 0; i < NUMBER_OF_SOLAR_CHANNELS; i++)
   {
-      dayRxYield[i] = 0;
+      dayRxYield[i] = 65535; /* default: invalid/unset value */
   } /* for */
 
@@ -450,5 +450,5 @@
   unsigned char power; /* variable for conversions */
   unsigned char checkDate; /* temp variable for day of month */
-
+  unsigned char rxYieldChkSum; /* temp checksum for rx yield */
 
   /* always get Rx data */
@@ -616,9 +616,10 @@
             else if 
                  ((scDate[1] == 1) ||
-                 (scDate[1] == 5) ||
-                 (scDate[1] == 7) ||
-                 (scDate[1] == 8) ||
-                 (scDate[1] == 10) ||
-                 (scDate[1] == 12))
+                 (scDate[1] == 1+1) ||
+                 (scDate[1] == 3+1) ||
+                 (scDate[1] == 5+1) ||
+                 (scDate[1] == 7+1) ||
+                 (scDate[1] == 8+1) ||
+                 (scDate[1] == 10+1))
                  { 
                     checkDate = 31;
@@ -660,19 +661,38 @@
       if (cmpResult == 0)
       {
-        /* we have got a match! */
-       
-          if (currentChannel <= 5)
+          /* we have got a match (i.e. expected frame received) ! */
+          
+          /* calculate the checksum of the received data */
+
+          rxYieldChkSum = calculate_crc8(  (&(rxUART3[0])), (sizeof(yield_day_rsp)-2));
+
+          if (rxYieldChkSum == rxUART3[17])
           {
-
-
-              dayRxYield[currentChannel] =
-                extractBinaryHexDigitString( &(rxUART3[0]), 13, 16 );
-
-          } /* if */
+            /* checksum is correct! */
+
+            if (currentChannel <= 5)
+            {
+  
+                /* convert and copy value */
+                dayRxYield[currentChannel] =
+                  extractBinaryHexDigitString( &(rxUART3[0]), 13, 16 );
+  
+            } /* if */
+            else
+            {
+              /* all channels done. nothing to do, we leave via SOL_QUERY_YIELD */
+            }
+          }
+          else if (currentChannel <= 5)
+          {
+            /* valid channel index. but checksum is incorrect ! */
+            dayRxYield[currentChannel] = 65535; /* invalid value */
+          }
           else
           {
-            /* all channels done. nothing to do, we leave via SOL_QUERY_YIELD */
+            /* checksum incorrect and channel index out of range. do nothing. */
           }
 
+          /* always move on to the next value... */
 
           currentChannel++; /* increment channel counter so we query the next channel in the next round */