Tnx for your reply guys.
I deleted (and resetted as that instructions say) the devices from the hub prior to testing to add.
I will try PTP some more times and hope for the devices to show up.
The thing is that when the orange led flashes and then turns green and blink green one Time, the app says that it’s adding a devices. But after that 1 green flash, the device led dont blink anymore. And after 5-10 sec the app says that the device didn’t respond 
