SUPERB!!
Thank you Marque!!!
This is just what I needed. I just started on my room-automation project today, so I'm sure I'll come up with some suggestions soon enough 
I tried rating the app, but unfortunately i don't have a Google+ account as yet -- will get around to that soon!
Thanks,
R
PS - Though I've made some changes and its working great, i have no clue what the following code does. Could you please explain it to me in just a brief overview sentence or two? Thanks!
{readString.concat(c);}
if (c == 'H')
{
Serial.println();
int Is = readString.indexOf("/");
int Iq = readString.indexOf("?");
int Ib = readString.indexOf("b");
int Ic = readString.indexOf("c");
if(readString.indexOf("?") > 1)
{
if (Ib == (Iq+1))
{
char carray[5];
readString.toCharArray( carray,5,(Ib+1));
Serial.println(carray);
valueB = atof(carray);
Serial.print("B is now: ");
Serial.println(valueB);
client.print (content_main_top);
client.print("B is now: ");
client.print(valueB);
}
else if (Ic == (Iq+1))
{
char carray[5];
readString.toCharArray( carray,5,(Ic+1));
Serial.println(carray);
valueC = atof(carray);
Serial.print("C is now: ");
Serial.println(valueC);
client.print (content_main_top);
client.print("C is now: ");
client.print(valueC);
}