4
Communication Protocol
Basic Specification
Communication with DN-700AVP uses ASCII Code from 0x20 to 0x7F, which includes the alphabet,
numbers 0–9, space (0x20), some signs, and carriage return (CR, 0x0D).
There are three types of communication used by DN-700AVP:
1. Controlling DN-700AVP from the host
When DN-700AVP receives a control command
from the host, the device executes the command.
See Control Command Codes for the complete
list of command codes.
2. Sending status information for a status request
command from the host
When DN-700AVP receives a status request
command (Command + ?+ CR [0x0D]) from the
host, the device responds with the status
information command.
The response should be sent within 200
milliseconds (ms) of receiving the command.
See Status Request/Information Codes for the
complete list of status commands.
3. Sending status information automatically when
there is a change to the device status
When a change to DN-700AVP is made from the
device, it automatically sends the status
information to the host.
The form of the status commands is the same as
the status information commands, above.
DN-700AVP Host
Control
Command
DN-700AVP Host
DN-700AVP Host
Status
Request
Command
Status
Information
Command
Status
Command
