Updated Rules (markdown)

Rules.md

@@ -366,6 +366,16 @@ on SI7021#temperature>%var1% do backlog var1 %value%; publish stat/sonoff/temp %
 on SI7021#temperature<%var2% do backlog var2 %value%; publish stat/sonoff/temp %value%; var1 %value%; add1 2; sub2 2 endon
 ```
 
+* Example: Adjust the value of a sensor and send it by MQTT
+
+This example adds 2 degrees to the measured temperature and then sends that value to a MQTT topic.
+
+```
+rule
+on tele-SI7021#temperature do backlog var1 %value%; add1 2; event sendtemp endon
+on event#sendtemp do publish stat/sonoff/temp %var1% endon
+```
+
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 #### 9. Simple Thermostat Example