[Tinyos-help] mote-pc serial communication problem

[Jierui Cao]

Hi, guys in TinyOS community, 

     After installing the TestSerial application on a micaZ node,the command
line is 

#make micaz install mib510,/dev/ttyUSB0

And then I followed the tutorial in lesson 4, and type 

#java TestSerial 

Then, I encounter this problem:

sf at localhost:9002 died - exiting (java.net.ConnectionException: Connection
refused)

I have change the mod of the /dev/ttyUSB0 to 666, as the tutorial write,

I even tried this several times, and google a lot , however not able to
figure out where I am wrong. 

So, please anyone can tell me what is the problem with it?

Any reply are really really  appreciated!

                                    Jierui.

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