Bug Fix – Add On zones do toggle from the GUI, fix to request.js and db.php. + Tidy Up – ajax_fetch_data.php. use existing variable in place of table reference. + Update – new field ‘test_run+time’ added to ‘system’ table, to be used in future release to run MaxAir at an artificial time as a way to test scheduling. + Update – zone and boiler controller NRF24L01 sketches and gateway.py to add ‘heartbeat’ feature #474