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DL management
Posted: Tue Sep 08, 2015 8:46 am
by francois
Hi
I understand that DL is only manage using acknowledgement procedure (4 msg max per day).
But what is not clear to me is the number of bytes that we can sent in a DL msg.
Is it limited to 12 bytes per message ?
Regards
Francois
Re: DL management
Posted: Tue Sep 08, 2015 8:49 am
by lcheminade
The up message (product to backend) is 12 bytes. The down message (backend to product) is 8 bytes.
Re: DL management
Posted: Tue Sep 08, 2015 10:11 am
by francois
Thanks
Do you guys have access to management devices litterature regarding this few bandwidth on DL.
By management device I mean remote devices configuration.
Francois
Re: DL management
Posted: Thu Oct 15, 2015 7:38 am
by mstempin
Hi François,
What do you mean exactly? Yes,we have access to the Sigfox specification, if this is what you mean.
The downlink communication is using a different modulation from uplink: GFSK @ 600bps vs. BPSK @ 100bps, wit ha completely different frame format and RF characteristics, thus the difference in payload size.
The 12 byte payload uplink and 8 byte payload downlink limitations are inherent to the UNB (Ultra-Narrow Band) technology of the Sigfox network and cannot be increased.