ps: just to be clear, the data set behind the above example would be
[ { "datalogger": "PLV_CEM01", "data": [ {"date": "15/10/2019", "qty": 117.6}, {"date": "14/11/2019", "qty": 192.8}, {"date": "20/12/2019", "qty": 93.2}, {"date": "02/03/2020", "qty": 69.4} ], "aggregated_qty": 625.2 }, { "datalogger": "PLV_PAR01", "data": [ {"date": "15/10/2019", "qty": 122.4}, {"date": "14/11/2019", "qty": 205.8} ], "aggregated_qty": 669.6 }, { "datalogger": "PLV_PAR02", "data": [ {"date": "15/10/2019", "qty": 120.2}, {"date": "14/11/2019", "qty": 172.2}, {"date": "20/12/2019", "qty": 81.6} ], "aggregated_qty": 587.6 } ]general forum