"No
route to host"
I assume you are connecting to your AIS or possibly Signal K or something similar via
Wifi?
Is your
phone trying to join another
Wifi? Or possibly losing connection to the wifi?
"No
route to host" means that there is no entry in the route table that can be used to get traffic to that
destination IP. Most likely you are expecting to be on the same
network as your AIS data source, but it looks like you are, then you aren't. That seems to me like either loosing wifi signal, or joining another preferential signal.
Its less likely that you are actually trying to connect to something that's on a different
network that your
phone. In that case you'd need a router on your local network to route the traffic to the
destination network. Typically that's the "default router" but I won't get into that unless that's what you're trying to do.
I'm sort of going through the same thing with Aquamap on my
iPad at the
helm. I was trying to connect to me RPi4 running OpenPlotter in A/P mode but the Wifi signal from the pi is too low.
I bought a
cheap ($30 Linksys WRT54GL router/wifi access point, switched out the wall wart for a 12v line), connect my pi and my
ipad to the same network and I keep signal.
Still having issues with aquamap though but I'm not getting "no route to host" like you.