After a few successful months, again we have serial problems with the connection between the Peet Bro’s Ultimeter 2100 weather station and my Kenwood TM-D710. A few days ago I noticed some ‘flat lines’ on aprs.fi in my weather station telemetry. That is extra weird if you think about it. If telemetry is flat lining the Kenwood must send the same data over and over again. When I checked the settings I noticed indeed a static set of data was on the Kenwood and it did not seem to update anymore although the weather station was updating.

That (and the fact that it worked without problems for a few months) make me suspect the problem is in the Kenwood and it is not necessarily serial problems. So I turned the power off and disconnect the power supply for a minute or so. Turned everything on and waited until the first telemetry from the weather station was on the screen of the Kenwood again. Everything worked fine for a few hours and then same freeze happened again. And again.
So now I turned off the Kenwood permanently and I have to investigate this problem further. I already did check the serial levels from the Ultimeter. Those seem okay. I think I have to give the Kenwood a full reset. I know it’s possible, but I do not know how to do that exactly. RTFM!
On Twitter I read Matthew W2MDW also has TNC-problems with his brand new TM-D710G. Maybe there is a 2016-bug in its software? 😉

*update* found the problem; clocks of the Ultimeter and TM-D710 have to be on the same time. After a few months they where a few minutes apart. Then the time stamps on the APRS-packets gave errors and the TM-D710 doesn’t recognize the packets anymore. I guess I have the check and adjust time every month of both devices. Feels like I own a really old watch 😉