CHECKSUM for NULL START CODE? - E1.20 RDM (Remote Device Management) Protocol Forums

ericthegeek · May 13th, 2009

If you need a checksum for Null Start Code (NSC) packets, SIPs are the proper way to do it.

Yes, the checksum *could* be added to the NSC data itself, but either solution will require a firmware update for both the sender and the receiver. Since you have to modify the firmware anyway, doing it with SIPs allows you to have the checksum functionality without breaking the conventions that determine how NSC data is used.

I think SIPs are one of the best features added in the E1.11 revision of DMX. I wish they were more widely used. Sadly, I'm only aware of 3 devices that support SIPs.

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May 13th, 2009	#3
ericthegeek Task Group Member Join Date: Aug 2008 Posts: 390	If you need a checksum for Null Start Code (NSC) packets, SIPs are the proper way to do it. Yes, the checksum could be added to the NSC data itself, but either solution will require a firmware update for both the sender and the receiver. Since you have to modify the firmware anyway, doing it with SIPs allows you to have the checksum functionality without breaking the conventions that determine how NSC data is used. I think SIPs are one of the best features added in the E1.11 revision of DMX. I wish they were more widely used. Sadly, I'm only aware of 3 devices that support SIPs.