On Wed, 2006-01-18 at 15:39 -0600, Sam Pierson wrote:
> Hi everyone,
>
> I dug through the mailing list archives looking for some info on
> the received signal strength of incoming packets. I have one
> mote that transmits messages of type IntMsg over the radio.
> The other mote has TOSBase installed on it and is on the programming
> board, which is then connected to the serial port. When I
> use the java tool ListenRaw, I get things like the following:
>
> 7E 42 FF FF 04 7D 5D 04 22 00 01 00 EA 1E
> 7E 42 FF FF 04 7D 5D 04 23 00 01 00 5E 68
> 7E 42 FF FF 04 7D 5D 04 24 00 01 00 73 39
>
> So from what I've gathered from micaz/AM.h:
>
> uint8_t length = -|
> uint8_t fcfhi = | Not sure about these top four.
> uint8_t fcflo = 7E |
> uint8_t dsn = 24 _|
> uint16_t destpan = FF FF
> uint16_t addr = 04 7D
> uint8_t type = 5D
> uint8_t group = 04
> int8_t data = 22
> uint8_t strength = 00 <-- ??
>
IntMsg.h:
typedef struct IntMsg {
uint16_t val;
uint16_t src;
} IntMsg;
In the first packet (little endian):
22 00 is the data value (34).
01 00 is the source (node 1)
EA 1E is the signal strength (7914)
Phil
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