regenerating model.py from the dia diagram. There is a foreign key problem due to mismatching of type of the id between tables.
generating the schema.mysql.sql file with the good foreign key constraint, but invalid because of the 2 auto_increments in the Metering table's sensor_id /id columns
Edit the schema.mysql.sql to have it valid in mysql.
creating the new good doc/model/model.py file
Refreshed model.py with sqlacodegen, from the mysql sgbd
TODO: pass to metering_tbl et sensor_table DONE
clean station.py, adds doc/model/README.rst