Allows for either SDFS or SPIFFS to be used with this library

A parameter specifies which library will be compiled in and used.
USE_SD
USE_SPIFFS
Only one can be chosen. Default in this lib is SPIFFS

Adds an interval zero to never update automatically to SD card

Adds an interval zero to never update automatically to SD card

Fixes for interval hold

The interval for write needs the flag left high if it didnt write during that event. also debug added.

Adds saveinterval parameter to object

Stops excessive writing to protect SD card life by limiting writes in seconds to the saveinterval value as shown in the documentation.

Replaces SPIFFS with SD card support

The amount of writes made by this library could have a negative impact on the onboard storage of an ESP32 so ive removed it and replaced it with SD card support.

Raises write flag when manually updating meter value

Raises write flag when manually updating meter value

Smaller memory footprint, new features and fixes

I need to remove all of the waste as the bigger project wont tolerate needless storage of unneeded data that a user space program should be generating. Ive removed the verbose messaging and passed instead data for which messages can be keyed off of, the way it should be. Freeing up about 1K.

Continued fixes for compatibility

Fixes that work with both arduino ide and platform IO

Initial Release

Initial release for dev work of irrigation project