Update watermeter limits

watermeter.yaml

@@ -13,17 +13,17 @@ packages:
 
 sensor:
 - platform: pulse_meter
-  # Our meter (USLF20) is rated Q3=4.0 (m3/h).
-  # The official one is rated 5.0 (assuming also Q3).
-  # There's no Q4 value available.
+  # Our meter (USLC/20) is rated Qmax=5.0 (m3/h).
+  # The official one is rated 5.0.
   #
   # 3600 / 5000 = 0.72 seconds per liter. That's the shortest
-  # pulse length at a normal flow rate for the meter. Assuming
-  # 5x worst case, take 100ms as a reasonable margin.
-  internal_filter: 100ms
-  # Assuming Q1=70 (l/h), a flow with 52 second between pulses
-  # is beyond the measuring capabilities.
-  timeout: 1min
+  # pulse length at a maximum flow rate for the meter.
+  internal_filter: 720ms
+  # Assuming Qmin=50 (l/h), a flow with >72 seconds between pulses
+  # is beyond the measuring capabilities (0.83 L/min which is just
+  # below irrigation consumption).
+  timeout: 72s
+
   pin:
     number: D2
     inverted: true