That was a good suggestion. TRACERT is Windows, but a bit of research gave me traceroute, which is the Linux equivalent. I needed BusyBox on the android device to get that command, and it works fine for the TV. However, for the Home Theatre, it finds it whether it is turned on or not. Very close, but note quite time for the cigar yet. I have a support request in with Fing - that seems to be the only program that is giving me the right answers - to see if there is any way of capturing its output. They do have an API available, and its not expensive - but I am concerned I no longer have the skills to use it to write the utility.
Cheers, Mick ------------------------------------------------ A programmer is a person who always checks both ways when crossing a one-way street.