devicelist = [ 
#              DeviceName  ID      Description              Data  
             ['Climate', '2521', 'Temperature and Humidity',{'Temperature':'float', 'Humudity':'float'}],
             ['Dust', '2522', 'Pollution Sensor',{'dustppm':'float'}], 
             ['Quality', '2523', 'Air Quality',{'gasppm':'float'}]
           ]
