Shouldn't there be another 2 bytes for MAC footer? So should the limit be 109 bytes?
BTW, want to confirm whether the 6 bytes physical layer header is counted in the 127 bytes.
Thanks,
Tie
On 10/22/06, Raghu Ganti <[EMAIL PROTECTED]> wrote:
Yes, on the MicaZ, it is limited by 127, the headers are 16 bytes (physical and MAC layer headers). Thus, the limit will be 111 bytes. But, you will incur lot of packet errors at such large frame sizes.
Raghu
On 10/21/06, [EMAIL PROTECTED] < [EMAIL PROTECTED]> wrote:Message: 6
Date: Fri, 20 Oct 2006 20:18:39 -0700
From: Philip Levis < [EMAIL PROTECTED]>
Subject: Re: [Tinyos-help] Maximum Data length of TinyOS Stack
To: Tony Han < [EMAIL PROTECTED] >
Cc: Jayedur rashid <[EMAIL PROTECTED]>,
[email protected]
Message-ID: < [EMAIL PROTECTED] >
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
On Oct 20, 2006, at 11:08 AM, Tony Han wrote:
> change #define TOSH_DATA_LENGTH 255 in your AM.h file, and also
> change it in your application file.
>
> I think the max length is 255. but not sure.
>
255 won't work, as you also need the header.
On the mica2, people have been able to use 244; on the micaz/telos,
you're limited by the 802.15.4 max size of 127, minus headers. So 110
or so is safe.
Phil
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Regards,
Tie
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