@keithriley As you tipped me off with your prior remarks about the HE hub not receiving a response here is the log when I press the 'On' switch from the device.
From a practical point the on switch operates the pool light which, in the ST world, was EP1.
[dev:257](http://192.168.7.201/logs#dev257)2018-05-17 07:33:01.488:debug<<<<< dly:1500/1500 <<<<< Event: [name:switch, value:on]
[dev:257](http://192.168.7.201/logs#dev257)2018-05-17 07:33:01.473:debug>>>>> BasicReport(value:255) - description:zw device: 38, command: 2003, payload: FF
[dev:257](http://192.168.7.201/logs#dev257)2018-05-17 07:32:59.822:debug<<<<< dly:1500/1500 <<<<< Dev cmd: BasicSet(value:255) --> 2001FF, delay 1500 <<<<< Dev cmd: BasicGet() --> 2002
[dev:257](http://192.168.7.201/logs#dev257)2018-05-17 07:32:59.820:trace## HubAction: BasicGet(), format()=2002
[dev:257](http://192.168.7.201/logs#dev257)2018-05-17 07:32:59.818:tracel -> BasicGet()
[dev:257](http://192.168.7.201/logs#dev257)2018-05-17 07:32:59.817:trace## HubAction: BasicSet(value:255), format()=2001FF
[dev:257](http://192.168.7.201/logs#dev257)2018-05-17 07:32:59.814:tracel -> BasicSet(value:255)
[dev:257](http://192.168.7.201/logs#dev257)2018-05-17 07:32:59.793:debug+++++ on()