[Tinyos-help] Packet structure with TinyOS-1.x

[Edgar Charry]

Hello everyone,  I am experimenting problems with the packet structure. I'm using the TinyOS1.x operating system.The TOS_Msg struc is intact, but i've changed the xsensor header a bit. However i cannot recognized some bytes that my programm is listening (and shouldn't be received). They are marked with a "???" below. Can anyone PLEASE give me any sort of explanation? As strenght and ack bytes are not sent,  don't really know what they are (or where the CRC is). My packet struc should be 5 bytes of TinyOS Header :a. Dest Add - 2, AM Group - 1, AM Type - 1, Length - 1 another 6 bytes of xsensor header (which i changed to count the packets supposed to be transmitted and the transmitted in fact):b. packet_id - 2, tx_id - 2, node_id = 1, rsvd -1 and the payload that should contain 8 bytes:c. thermistor - 2, adc2 - 2, adc3 - 2, adc4 - 2. and:d. 2 bytes of crc. Leading to a total of: 21 bytes. However listening to the UART Port using Labview i read 27 bytes everytime.Below: FFFF 007D 5D0E A200 A200 0700 DB01 A701 5B02 1702 CD00 C5B3 7E7E 42: FFFF: Dest Add |00: AMGroup |7D:  AMType|5D = ????0E: length (which is 14bytes and is correct)|A200: packet id|A200: tx id|07: node id|00: reserved|DB01:Thermistor|A701:ADC2|5B02:ADC3|1702:ADC4|CD00:???C5B3:???7E7E:???42:??? Thanks many times for any kind of guidance!Edgar Charry
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