Pump length, mqtt improvements

irrigation/README.md

@@ -0,0 +1,15 @@
+# Irrigation with an ESP8266
+Tested with D1 mini. Connect a pump with a relais. Relais activation on D4.
+
+## Homeassistant integration
+payload_on can also contain the duration of the pump in ms.
+Example:
+`
+switch 5:
+- platform: mqtt
+  command_topic: greenhousino/pump
+  state_topic: greenhousino/pumpstate
+  payload_on: "on"
+  payload_off: "off"
+  name: "Pumpe"
+`