The DGH D1000 and D2000 series products use a simple command and response protocol. A
module must be interrogated by a host computer to obtain data. A module will never
initiate a command sequence in order to prevent communications collisions.
A command is initiated with a command prompt, may be a dollar sign ($) or pound sign
(#). Following the prompt a single address character must be transmitted. Each module on a
communications bus must be setup with a unique address. The address is followed by a two
character command. Every command is terminated with a carriage return.
The module response begins with a response prompt, which is an asterisk (*) followed by
the necessary data. Every response is terminated with a carriage return. Linefeeds after
the carriage return are user selectable. See the table below for typical commands and
their respective response messages.
