8-bit MicrocontrollersのトピックData packet acknowledgement (MAC code base)

Data packet acknowledgement (MAC code base)

phlp — Thu, 08 May 2008 22:22:58 GMT

Hi all,

I would like to switch message confirmation off (i.e. the recipient does not have to acknowledge the received message/packet). I've set mpPacket->msgData.dataReq.txOptions = 0 but messages are still being acknowledged. Any other suggestions?

Thanks

Philip

Re: Data packet acknowledgement (MAC code base)

Mads — Fri, 09 May 2008 12:55:28 GMT

Phillip,

By removing "gTxOptsAck_c" from the txOptions you will NOT get any over the air acknowlegdements.

But you will still receive a mcps-data.confirm saying that the packet was succesfully transmitted.

Without a protocol analyzer to see the over the air data you will not see any difference.

Br,

Mads

Re: Data packet acknowledgement (MAC code base)

phlp — Fri, 09 May 2008 18:53:19 GMT

Thanks for the info Mads. One more question: I'm transmitting real-time sensor data over a Zigbee star network at about 20 Hz per sensor. Due to the real-time nature lost packets do not have to be retransmitted. Can you make suggestions to optimise the network for performance? My problem is that the coordinator is being overwelmed by the amout of data from the end-devices (sensors) and consequently the coordinator does not have time to scan for new sensors after a few of the sensors has connected.

Philip

Re: Data packet acknowledgement (MAC code base)

Mads — Fri, 09 May 2008 19:32:26 GMT

Phillip.

I can only suggest that you send your data less frequent. 802.15.4 does not allow you to send too much data. It is a 250 physical link. which allow you around 115Kbit theoretically.

you are properly on the limit.

other than that, do not transmit the data over the uart all the time as this also steals alot of CPU bandwidth.

Br,

Mads

Re: Data packet acknowledgement (MAC code base)

phlp — Fri, 09 May 2008 19:37:12 GMT

Thanks Mads. I'll look more closely at the UART issue.

Philip

Re: Data packet acknowledgement (MAC code base)

竹隐杨 — Fri, 09 Aug 2013 07:09:56 GMT

hi everyone:

my zigbee happen data lost ,can you help me ?