I need to read data from a text file in a tinyos file (nesc file). I searched lot on Internet but couldn't find a way.
Is there any way?
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Read txt file from where? from the flash memory or sd card?! – Dumbo Apr 21 '13 at 23:04
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from hard disk, when doing tossim simulation – unknown_boundaries Apr 22 '13 at 10:04
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AFAIK, There is no way to directly read from a PC on a sensor board.... – Dumbo Apr 22 '13 at 11:45
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I don't know about TOSSIM, but using a real sensor board its possible to do so.
What you could do, is to write a program using Java, C#, etc that reads the file and passes the acquired data to the serial/usb port as a SERIAL PACKET. But you are limited to maximum of 255 byte for each packet.
So you should make a simple protocol that takes care of data chunks.
Of course you should know that how you can create a serial packet to be readable by sensor boards.
For that you need to read the TEP#113. But short story, a serial packet is consisted of:
HEADER + CONTENT + FOOTER
header contains protocol byte, destination and source address etc... content is your message_t struct footer has CRC and some other stuff
You have to take care of CRC calculation and also escaping start/end delimeters (I believe byte 126 or 127 is the delimiter, I mean indicator of starting and ending a packet).
Dumbo
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