Thanks IanW!
If you have the VI that you have tried to make yourself, you should
post it here in this thread! Someone here might be able to help you
out faster by fixing your VI and posting the result for you and
anyone else to download!
I don't think I can fix it, but it would be fun to take a look at it
Well, thats it, the launch is in T -2.5 hours and counting. Me and
some core members have been out in the hangar working all night to
weed out some minor problems that crept up during final integration,
but I think we got it.
For some weird reason, neither the original VI (barebone save data to
I didn't explain the incomming dataformat all that clearly, so I will
do it again.
Incoming serial data format is the text within quotes. It is repeated
in a while(1) loop on the balloon.
BEXUS[h][m][s]BEXUS[h][m][s][7*8*16bits of data]
[h]=8bits [m]=8bits [s]=8bits
So that means, that after the
Ahh! I see! Well, that removes the danger of missinterpretation at the
cost of increased bandwidth as you say.
Sampling only a couple of times a second means that the bandwidth wont
be a problem in and of itself, however, we are running the PIC
controller on at a very low clock rate (32.kHz) and
Hu. Interesting.
The biggest disadvantage I can see with this is that it feels more
complex. I'm in the process of learning and I feel like it is easier
to understand what I'm doing if I use a measure-identifier.
I see that having a certain telegram format where the second data is,
say, T2, I
You cant edit messages? Oh well.
I forgot to answer your question Brian and the answer is 10 bits of
data/request, so by having at least 3 characters, the data can never
be equal to the header or footer. :)
To save on bandwidth I will probably cut it down to 3 characters for
the final
Thank you Brian Powell!
Together with Greg McKaskle you have provided tremendous help. I have
figured out the star system thing, and have upgraded you both to four
stars since all your replies taken into consideration makes it a four
star from my point of view, even if you hadn't managed to get
I don't have any 100% accurate values at this time since we have not
desgined the sample system yet. However, going with what I have to
estimate one:
Assuming data is transferred in binary format (header and footer in
ASCII)
10 data sources, each is app. 10-13 bit long, round up for worst case
=
Thanks for a fast reply with relevant information! :)
I think using a history buffer and have one graph will be to slow. The
satellite will be active for 6 - 8 hours, and towards the end of that
time, I think (I don't know) that the time it would take to read in
the buffer and then display the
Hi Brian and thanks for your feedback.
A few comments:
I'm tagging the data, because I want to be able to sample and send
in a loop from the satellite side, without querying for the data. But
I also want to be able to query specifically for data manually. I
don't know what I will end up doing in
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