Go to the WIKI, there you will find a comprehensive toturial to help you implement this card.
The project is forked from @pesor - who did a great work.
Primary modifications are:
- Updates in MQTT messages to reflect latest Home Assistant changes
- (Optional) Water Level Sensor
- New Casing (3D print stl files) supporting larger LiPo battery
- Original Casing (3D print stl files)
- Some Bugfixing and optimizations
...with caffeine?