Minor updates.

README

@@ -63,10 +63,6 @@ serial libraries on read()s; adding some small delays in the serial read()
 seemed to tidy these up. Should look at the interrupts, but like I said,
 I put this together in a hurry.
 
-The WiFly wakes up independently of the Arduino. You might want to sacrifice
-a pin or two to check RTS on the WiFly to be sure it's there before you tell
-it to upload.
-
 The Bluetooth bee is put to sleep by manipulating pin 5 on the Seeeduino
 Stalker. There is a track you have to cut on the board in order to be able
 to do this; read the Stalker specs for details.

relay.ino

@@ -18,6 +18,9 @@
 
 #define MAX_RETRIES 3
 
+#define SLEEP_SHORT 10
+#define SLEEP_LONG  60
+
 unsigned long last_total_kwh;
 unsigned long last_spot_ac;
 unsigned long last_now;
@@ -112,18 +115,18 @@ void loop(void) {
         if (total_kwh == last_total_kwh &&
             spot_ac == last_spot_ac &&
             now == last_now) {
-            sleep_minutes = 60;
+            sleep_minutes = SLEEP_LONG;
         } else {
             last_total_kwh = total_kwh;
             last_spot_ac = spot_ac;
             last_now = now;
-            sleep_minutes = 10; /* pvoutput default upload is 10 minutes */
+            sleep_minutes = SLEEP_SHORT; /* pvoutput default upload is 10 minutes */
 
             wifly_init();
             wifly_upload_stats(total_kwh, spot_ac, now, tmp102_get());
         }
     } else {
-        sleep_minutes = 10;
+        sleep_minutes = SLEEP_SHORT;
     }
 
     wifly_sleep(sleep_minutes); /* put wifly to sleep */