Hello friends ..
I am having some problem when i receive packet data . I am using Listen tool
to just have look at what packets i am receiving ..
I have already changed TOSH_DATA_LENGTH thus i am able to send 9*4 +3*1 = 39
byte data .
Now on base mote (connected to pc) i have developed a program which on
reception of data from radio , transfer it to pc via serial data transfer .
This program is motivated from Oscilloscope program. I am working on telosb
platform in T2.
my header file contain structure oscilloscope as
typedef nx_struct oscilloscope {
nx_int32_t reading1;
nx_int32_t reading2;
nx_int32_t reading3;
nx_int32_t reading4;
nx_int32_t reading5;
nx_int32_t reading6;
nx_int32_t reading7;
nx_int32_t reading8;
nx_int32_t reading9;
nx_int8_t reading10;
nx_int8_t reading11;
nx_int8_t reading12;
} oscilloscope_t;
and
Packet data i am getting is .. (with the help of Listen)
00 FF FF 00 00 09 00 72 21 00 13 00 01 00 01 00 69
00 FF FF 00 00 27 00 93 1E 70 19 12 20 56 E9 80 30 C5 9B 05 32 2D 47 A7 63
0E 12
56 62 08 53 DB 1C F9 9E 7E 2E 90 7A 37 5E F5 C1 CD 04 04 04
1) Here we can observe that .. PC is receiving 2 messages for only one radio
message .. WHY ?
2) My message length is 39
here
00 FF FF 00 00 ---*09---* 00 72 21 00 13 00 01 00 01 00 69
00 FF FF 00 00 ---*27---* 00 93 1E 70 19 12 20 56 E9 80 30 C5 9B 05 32 2D 47
A7 63 0E 12
56 62 08 53 DB 1C F9 9E 7E 2E 90 7A 37 5E F5 C1 CD 04 04 04
it is either 9 or 27 .. which on adding becomes 38 . all three does not
equals with my payload length.
3) 00 FF FF 00 00 09 00 72 21 00 13 00 01 00 01 -----*00 69-------*
00 FF FF 00 00 27 00 93 1E 70 19 12 20 56 E9 80 30 C5 9B 05 32 2D 47 A7 63
0E 12
56 62 08 53 DB 1C F9 9E 7E 2E 90 7A 37 5E F5 C1 CD 04 04 04
the bold part is counter .. which is not set by me ..
please help ..
thanks in advance ..
--
With Best Regards
Himanshu Barve
M.Tech Electrical Engineering (Power System)
IIT Kharagpur , West Bengal , India
Ph: - +91 9775201181
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