[PLUG] Evil thermostat

[Chuck Hast]

Sorry, should have, not there is not. But the interesting thing
is that as long as it cannot contact the network there is no
time change. I think I am going to go into the firewall and
make it drop all packets to/from the device and see what
happens. If that takes care of it then maybe allow it to talk
on the LAN but drop anything going to/from it on the WAN
side.  I would like to see what it is talking to. So far I have
not been able to catch it.

On Mon, Jan 3, 2022 at 11:00 PM Erik Lane <eriklane at gmail.com> wrote:

> You don't mention this, but since it's always 2 hours, is there a time zone
> setting in there that has gotten off? Maybe it's talking to a NTP server?
>
> On Mon, Jan 3, 2022 at 8:49 PM Chuck Hast <wchast at gmail.com> wrote:
>
> > Folks,
> > Not sure where to take this but figured that I would get more
> > info here.
> >
> > I have a RadioThermostat CT80. I have had it now for several
> > years. As the summer wound down. I shut down the A/C and
> > opened the windows in the house. Then in Nov I needed to fire
> > up the heating, all appeared to be well, but I noticed that the
> > thermostat clock was 2 hours slow. I set it and a while
> > later see that it has lost 2 hours again.
> >
> > I have a home automation system. I checked the logs, and
> > contacted the author. He has a CT50 which has fewer bells
> > and whistles than mine but same unit. Anyhow he gave me
> > some guidance, in the end I shut down the HA system and it
> > still would drop the 2 hours, I powered the thermostat down
> > and removed the WiFi radio, powered it back up, it ran about
> > 4 hours (about 3 hours longer) and never dropped the 2 hours.
> > Normally it will go between 20 minutes and an hour after I
> > have set it to the correct time, then drop back to the incorrect
> > time. So this appears to indicated that it is either something
> > on the network that is doing the time change or something in
> > the WiFi radio.
> >
> > I am trying to sniff the network and see if I can catch any
> > weird packets. But this is one I have not done before.
> >
> > My router is a Mikrotik 2011, and I have been trying to use
> > the tools on it to try to monitor the IP address of the thermo-
> > stat and try to see if it is talking to something else. So far
> > no joy.
> >
> > I am wondering about getting wire shark in there and trying
> > to filter those packets that way as I am not having much luck
> > with the Mikrotik tools
> >
> > Any recommendations?
> > --
> >
> > Chuck Hast  -- KP4DJT --
> > I can do all things through Christ which strengtheneth me.
> > Ph 4:13 KJV
> > Todo lo puedo en Cristo que me fortalece.
> > Fil 4:13 RVR1960
> >
>


-- 

Chuck Hast  -- KP4DJT --
I can do all things through Christ which strengtheneth me.
Ph 4:13 KJV
Todo lo puedo en Cristo que me fortalece.
Fil 4:13 RVR1960