Version bump and changelog update

Author: Michael Ruettgers

CHANGELOG.md

@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.1.5] - 2020-07-25
+### Changed
+- Modified MQTT topic to use / instead of * due to invalid character issues when used with ioBroker
+
 ## [2.1.4] - 2020-07-24
 ### Changed
 - Worked on the docs

src/config.h

@@ -4,7 +4,7 @@
 #include "Arduino.h"
 #include "Sensor.h"
 
-const char *VERSION = "2.1.4";
+const char *VERSION = "2.1.5";
 
 // Modifying the config version will probably cause a loss of the existig configuration.
 // Be careful!