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Topic:
Can't figure out Protocol for DVR
This thread has 2 replies. Displaying all posts.
Post 1 made on Wednesday February 15, 2012 at 21:42
Mattkoch
Long Time Member
Joined:
Posts:
June 2008
169
I am working with a 9 channel DVR (WPS-300-DVR-9CH) from Snap AV and need to control it via RS232 connection from Bitwise. I have the protocol from Snap but I don't hardly understand what I am looking at. I have attempted to decipher the code myself but can't get it right for some reason.

If anyone has any experience with this could give me a code so I at least have something to base the rest of the codes off of. I have been to their support site hoping to find a driver to pull the codes from but all they have is Elan and C4 drivers and I don't carry either so no software .

Any help would be appreciated...

THanks,
Matt
Post 2 made on Wednesday February 15, 2012 at 23:24
mark65
Long Time Member
Joined:
Posts:
November 2003
450
I took a look at the ELAN driver. It doesn't appear to be complete.
According the document each command is 5 HEX bytes long:
Byte 1: Sync Byte (This is always FF)
Byte 2: Device ID (needs to match the device id of the DVR 00-FF)
Byte 3: Code (from the chart)
Byte 4: Reserved (Always 00)
Byte 5: Checksum (Sum of Bytes 2-4)

So the command for SEQ for DVR address 1 could beone of the following:
FF 01 65 00 66
FF 31 65 00 96
OP | Post 3 made on Wednesday February 15, 2012 at 23:30
Mattkoch
Long Time Member
Joined:
Posts:
June 2008
169
Mark,

Thank you for the help. I will give these a try and see what I come up with.

Matt


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