Hi Alan, On Sat, Apr 16, 2011 at 1:32 AM, Alan Marchiori <[email protected]> wrote: >> >> I see. However, you did not answer the question about the traffic >> load. That is what going to decide if this is a HW or SW problem, I >> think. > > I'll run it at 1 pps, but that how do you know that's low enough to > avoid any potential SW problem?
I do not know, but I have seen so many strange things with radio chips under heavy load. You want 1 PPS and a single node sending and a two nodes receiving. No other communication. It would be nice to know if both of the receivers have the same problem or not. >> PS. By the way, I agree that a software CRC check is needed, but 1) it >> wastes 2 more bytes, no?, 2) even that can let erroneous packets >> through as packets can be corrupted but still pass the CRC check. > > yes, it "wastes" 2 bytes. And yes it isn't certain, but the error > rate I'm seeing now (1/50k) is something I see frequently in my > application (this is how I discovered the problem). You can never be > absolutely certain that packet data is correct but these corrupt > packets can cause strange behavior and depending on the application > this error rate may be too great. On the other hand, running data > collection at very low data rates it might take years to send 50k > packets, so in that case I guess it's OK. But in my application this > error rate is significant enough to impact performance, so it needs to > be addressed. I agree. Miklos _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
