[Tinyos-help] Serial port hopping question

[029758s]

Hi folks,

I'm fairly new to TinyOS and I've modified the RSSI Demo program a  
bit. Instead of the base station calculating the RSSI between itself  
and the sending node, two "field nodes" calculate the RSSI, place that  
in a packet and forward it on to the base station.

I'm using TMotes, TinyOS 2.1.0 and Ubuntu 8.10.

I also have a simple Java application which writes the original sender  
ID, receiver ID and RSSI contained in the packet the base station  
receives when it gets forwarded on. I ran this application and things  
were going just fine but I noticed that the output stopped even though  
the base station still signaled that it was getting packets after a  
couple hours of execution. I ran motelist and while originally I had  
set up MOTECOM=serial@/dev/ttyUSB0 motelist told me that the mote was  
detected on ttyUSB1 now. I changed MOTECOM, tested the app and after a  
couple hours sure enough it went back to telling me the mote was on  
ttyUSB0.

Has anyone encountered this phenomenon and cleared it up?

Thanks!

Scott