So I've been reading a lot of Unwired and I am wondering. Since Technomancers can't be hacked by normal hackers, If a Technomancer slaves all his devises to his Living Persona can any of those devices be hacked by a normal hacker? It says that any wireless connection attempt against a sub node is automatically routed to the master commlink (in this case the living persona). If this is indeed true what response would a normal hacker see or possible error code would he get being unable to even detect the resonance based node?

It is true by RAW (as i perceive it).

Possible Error Codes would be "There is no node." or an utterly confused Analyse Agent who tells you the same. Or that the Operating System of the Node is there but your program seems to be incompatible with it.