Manual

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VM-4UHD - Packet Protocol Structure
8 Packet Protocol Structure
The packet protocol is designed to transfer large amounts of data, such as
files, IR commands, EDID data, etc.
8.1 Using the Packet Protocol
To use the packet protocol:
4. Send a command: LDRV, LOAD, IROUT, LDEDID
5. Receive Ready or ERR###
6. If Ready:
 Send a packet
 Receive OK on the last packet
 Receive OK for the command
7. Packet structure:
 Packet ID (1, 2, 3…) (2 bytes in length)
 Length (data length + 2 for CRC) - (2 bytes in length)
 Data (data length -2 bytes)
 CRC - 2 bytes
01
02
03
04
05…
Packet ID
Length
Data
CRC
8. Response:
~NNNNSPOKCR LF
Where NNNN is the received packet ID in ASCII hex digits.