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CONCEPT1 RS232 COMMUNICATION
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Concept 1 RS-232 Communication
Communicaon with Concept 1 via RS-232 is done with simple ASCII Commands and Replies. The port sengs are
19200Baud, 8bits, no parity and 1 stop bit. The physical connecon is as described in the gure below:
Pin 2: TX data: data transmission output
Pin 3: RX data: data recepon input
Pin 5: GND: ground
Other pins are not used.
An instrucon has at least a command and an aribute. In many cases, there are extra values needed, like a zone
or a value. Please make sure that you’re familiar with the 3 modes (stereo, 2 zone linked and 2 zone unlinked) of
the Concept 1 because in some commands, there needs to be a zone specied depending on the mode. From
here we assume that the 3 modes are clear and understood. If not, please read the user manual rst. Instrucons
always have to be ended with <CR>, carriage return. Line feed <LF> characters will always be omied, however
Concept 1 can use (and echo) <LF> aer a <CR>. Instrucons are not case sensive!
Commands
The 4 possible commands are: SET, GET, INC and DEC. With the INC and DEC command, a “step value” can be
specied. This needs to be a posive number between 1 and 10. A step value bigger than 10, will be set to 10. If
no value is specied, default value 1 will be used.
Example: the music volume is -50 and the following instrucon will be given:
INC MSCLVL<CR>
The music level now will be -49. Now the next instrucon is given:
DEC MSCLVL 8<CR>
The music level now is -57.

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