Rain rate MAYBE implemented correctly

python/davis_etl.py

@@ -202,12 +202,15 @@ class davisDecoder(object):
     def rainrate_decode(self, byte2, byte3):
         # if byte3(b2 here) is 0xFF, or 255, there is not rain
         print("b2:{} b3:{} = result:{}".format(byte2, byte3, byte2 + (byte3 >> 4 << 8)))
+        # No Rain rainstate = 0
         if byte2 == 255:
             rainstate = 0
             rainrate = 0
+        # Light Rain rainstate = 1
         elif byte2 == 254:
             rainstate = 1
             rainrate = 0.1
+        # Heavy rain rainstate = 2
         else:
             rainstate = 2
             if byte3 > 4: