ECH1560 call _sync from tick method

README.md

@@ -4,9 +4,9 @@ ESPurna ("spark" in Catalan) is a custom firmware for ESP8266 based smart switch
 It uses the Arduino Core for ESP8266 framework and a number of 3rd party libraries.
 
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code/espurna/sensors/ECH1560Sensor.h

@@ -75,6 +75,11 @@ class ECH1560Sensor : public BaseSensor {
 
         }
 
+        // Loop-like method, call it in your main loop
+        void tick() {
+            if (_dosync) _sync();
+        }
+
         // Descriptive name of the sensor
         String description() {
             char buffer[25];