@inveltr
Here are the logs using the iPad/HW and then openLuup/AltUI. This is a grouping of lights w/in the Hue plugin. "bri" should be an integer and it appears it's receiving a float within the action.
Using the iPad:[100% to OFF]
2017-10-04 20:55:51.553 openLuup.server:: GET /data_request?id=lu_status2&output_format=json&DataVersion=43610505&Timeout=60&MinimumDelay=1500&_=1507168411849 HTTP/1.1 tcp{client}: 0x1f7b760
2017-10-04 20:55:55.134 openLuup.server:: GET /data_request?output_format=json&id=lu_action&DeviceNum=39&serviceId=urn:upnp-org:serviceId:Dimming1&action=SetLoadLevelTarget&newLoadlevelTarget=0.0 HTTP/1.1 tcp{client}: 0x1e71d90
2017-10-04 20:55:55.135 luup.call_action:0: 39.urn:upnp-org:serviceId:Dimming1.SetLoadLevelTarget
2017-10-04 20:55:55.136 luup.call_action:0: action will be handled by parent: 5
2017-10-04 20:55:55.137 openLuup.server:: request completed (72 bytes, 1 chunks, 2 ms) tcp{client}: 0x1e71d90
2017-10-04 20:55:55.137 luup.variable_set:5: 39.urn:upnp-org:serviceId:Dimming1.LoadLevelStatus was: 100.0 now: 0.0 #hooks:0
2017-10-04 20:55:55.137 luup.variable_set:5: 39.urn:upnp-org:serviceId:Dimming1.LoadLevelTarget was: 100.0 now: 0.0 #hooks:0
2017-10-04 20:55:55.138 luup.variable_set:5: 39.urn:upnp-org:serviceId:SwitchPower1.Status was: 1 now: 0 #hooks:0
2017-10-04 20:55:55.138 luup_log:5: Hue2 Plugin)::(putToHue):data={"on":true,"bri":1}
2017-10-04 20:55:55.149 luup_log:5: (Hue2 Plugin)::(setLampValues) : Successfully changed lamp/group status for device 39 !
Using openLuup/Hue plugin:[100% to OFF]
2017-10-04 21:05:05.842 openLuup.server:: GET /data_request?output_format=json&id=lu_status&DataVersion=43610776 HTTP/1.1 tcp{client}: 0x1e71d90
2017-10-04 21:05:05.885 openLuup.server:: request completed (5510 bytes, 1 chunks, 42 ms) tcp{client}: 0x1e71d90
2017-10-04 21:05:06.585 openLuup.server:: GET /data_request?id=action&output_format=json&DeviceNum=39&serviceId=urn:upnp-org:serviceId:Dimming1&action=SetLoadLevelTarget&newLoadlevelTarget=0 HTTP/1.1 tcp{client}: 0x1fbe420
2017-10-04 21:05:06.586 luup.call_action:0: 39.urn:upnp-org:serviceId:Dimming1.SetLoadLevelTarget
2017-10-04 21:05:06.586 luup.call_action:0: action will be handled by parent: 5
2017-10-04 21:05:06.587 openLuup.server:: request completed (72 bytes, 1 chunks, 2 ms) tcp{client}: 0x1fbe420
2017-10-04 21:05:06.588 luup.variable_set:5: 39.urn:upnp-org:serviceId:Dimming1.LoadLevelStatus was: 100 now: 0 #hooks:0
2017-10-04 21:05:06.588 luup.variable_set:5: 39.urn:upnp-org:serviceId:Dimming1.LoadLevelTarget was: 100 now: 0 #hooks:0
2017-10-04 21:05:06.588 luup.variable_set:5: 39.urn:upnp-org:serviceId:SwitchPower1.Status was: 1 now: 0 #hooks:0
2017-10-04 21:05:06.589 luup_log:5: Hue2 Plugin)::(putToHue):data={"on":false,"bri":1}
2017-10-04 21:05:06.606 luup_log:5: (Hue2 Plugin)::(setLampValues) : Successfully changed lamp/group status for device 39 !