>>> - Your usb hub is bad? we had to buy three different types of usb
>>> hubs, just to find a good one.
>>> And at least for me, I see more problems when I use an usb hub.
>> Unfortunately, due to the physical construction of my PC's, I need
>> to
>> use some sort of hub or extender to actually connect the motes. I will
try to find another PC where this is not the case. However, I did try
multiple types of extender cables and hubs and the problem seems to repeat
on each of them.
>
> I am not so concerned about the cables as long as you are not connecting
several cables in serial (you can see noticeable power attenuation if you
connect several cables in serial), but the hubs do matter.
> Don't trust any cheap hubs. Dlink was not so great. Linksys 4-port was
what we ended up using, but still not as good as no hub at all.
Thank you for your reply.
It appears that several hubs and a certain extension cable were at the
heart of the problem. With appropriate USB connections, I was able to get
TestSerial working in both directions for up to 1000 packets. I will do
more stress testing with TestSerial and more complex applications in the
next few days.
While the extension cable was probably defective, the hubs appear to
work well with other devices. Do you know why some hubs have such
issues with telosb motes?
Thanks,
Tal
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