again, only from my T1 perspective, TOSMsg.ack should be != 0 in sendDone()
if an ACK was received before ACK_WAIT expired. This should indicate
successful message reception, however ACKs can get lost as well so
you can get false negatives.
MS
Tie Luo wrote:
PacketAcknowledgments.requestAck() enables acknowledgement.
But as a caveat, even if the ack is enabled and error==SUCCESS, it does
not guarantee the message has been sent to receiver. After the
transmitter sends out the message it will wait for a period of ACK_WAIT
(some constant defined like this) for the ack. However if the ack does
not come during this period it will still signal(SUCCESS).
Dr. Philip, correct me if I am wrong.
Tie
On 11/16/06, *Philip Levis* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
On Nov 15, 2006, at 8:26 AM, Tao Wu wrote:
> Would you please tell to enable acknowledgement when sending
> message? Thanks a lot.
>
> Best
If you are using tinyos-2.x, I recommend reading tutorial 3. It talks
about the PacketAcknowledgments interface and how to use it.
Phil
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Regards,
Tie
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