Thanks again..
Aldreay tried everything suggested at that link..
I was asking if there is some app or some trick that - at lower level - helps to identify the problem.. pointing the problem - for example - on Bonjour or something else..
I could think it is the router that has problems with Bonjour (if that's the cause) but the manufacturer (I contacted DLink) confirm that they are 100% Bonjour compatible (they gave me a FW update)
but considering that:
- HP Printer Control app (link) doesn't work properly (it doesn't show the Printer IP address and it doesn't enable the Scan and Copy button) on the iPhone..
- the equivalent application on Android (with a Tablet connected to the SAME wifi network) instead works perfectly (it shows IP and enables all functionality)
If it was the Router (Bonjour) I expect that also the Android app did show the same problem.. if both apps use Bonjour to discover the printer,,
Am I wrong?