[Tinyos-help] Re: Packet format from PC to base mote through UART

[Lei Tang]

Hi, Julia

Thanks for your reply.

I was using a general serial-port application to send data to the mote,
because I want to have my own application to control motes.

My steps:
Firstly, I created a data file with TOS_Msg type; then the application read
it and sent data to the base mote through serial port; I programmed the base
mote with TOSBase, and tried to check received data in event
UARTReveive.receive.

Yes, you are right; the length should be 6. But I'm not sure if the address
should be 0x007e, since I'm trying to send data FROM PC TO MOTE through
UART. Anyway, even when I changed the two fields, Msg->data is still not
correct.

I read SimpleCmdM.nc, which is used when injecting packets (Lesson 7 in
Tinyos tutorial). It seems that the received data is also TOS_Msg type
(see task
void cmdInterpret). I'm really confused.

Thanks a lot.

Best,
Lei

On 6/5/06, jabdo at site.uottawa.ca < jabdo at site.uottawa.ca> wrote:
>
>
> Hi Lei,
>
> Are u trying to send the packet to Micaz using serial Forwarder and
> Broadcast Inject. If not, What format are u using to send it???
> Note: 10 represents the data length right?? so I think it should be 6 and
> not 10. Also, since you are sending the packet to the UART so the
> destination address should be the UART address.
>
>
> My best regards,
>
> Julia
>
>
>
> -----------------------------------------------------------------------
> >
> > Hi, all
> >
> > I am trying to send a packet from a PC to a micaZ mote through serial
> > cable.
> > The packet looks like:
> >
> > 7e 42 ff ff 0 81 10 f f f f f f a1 21 7e
> >        header           data    crc
> >
> > (I put two random bytes in the crc field, but I think that's not a big
> > problem since it doesn't filt out CRC-error packet.)
> >
> > At the mote, I read the received data in event TOS_MsgPrt
> > UARTReveive.receive(TOS_MsgPrt Msg) {}. The header is correct, but
> > Msg->data[0] is always the last CRC byte, here 0x21, and I didn't see
> the
> > data section (0xf) in Msg.
> >
> > Did I make a right packet? How could I send data to base mote throught
> > UART
> > correctly?
> >
> > Thanks!
> >
> > Best,
> > Lei Tang
>
>
>
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