[Tinyos-devel] again about the baudrate issue for telos

Razvan Musaloiu-E. razvanm at cs.jhu.edu
Wed Sep 3 15:40:07 PDT 2008


Hi!

I attached a small application and a Python testing script that shows that 
115200 doesn't work reliably for telos. The nesC application is sending 
packets back to back while the script will accept all the incoming packets 
and tried from time to time to send some (one at a time). Using the 57600 
(enabled by default in the application) the acks work properly. When the 
115200 is enabled the acks stop working (or they come very infrequently).

This issue was discussed before [1] but no solution surface from that. In 
this context I think it would be good to switch to safer 57600 rate for 
now. Is anybody against this? :P

Note: I don't have a Windows TinyOS installation so I only tested on Linux 
on real machines and VMWare.

[1] http://mail.millennium.berkeley.edu/pipermail/tinyos-devel/2008-April/thread.html#2651

--
Razvan ME
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