• added support for german (DE) language thanks to @patrick-blom (#118)
• support new entity_category feature from HA core
• IMPORTANT: update to new 2021.12 core api 'breaking' changes for mqtt (#106)
• add support for mts100 configuration: heat,cool,economy(away) setpoints and room temperature correction
• increased http disconnection and key hacking 'resilience' (possibly related to #116 #107 #105 #99)
• improved tracing features with better obfuscation and added rx/tx to signal messages direction
• added basic support for calling light effects (msl320..very very beta/untested)
• add support for mts150 (beta/untested)
• fixed a minor bug which prevented device time synchronization to correctly start (when supported - likely fixing #98 for selected devices in the long term)

breaking changes

• modified the DND feature to be represented as a light entity (with category: 'configuration') see #71