EYE-LCD-8400-QHD-LE
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Appendix: RS232 Protocol
General description
The eyevis LC Displays can be controlled using an ASCII-serial protocol. Each
display is assigned an ID and can be addressed in the protocol using this ID.
Commands can either be sent to a single ID or to all devices simultaniously
(broadcast mode). Device with ID 1 is the master and controls and relays
communication between the devices.!
Communication and connection
Serial Port default settings
Setting
Value
Baud Rate:
115200
Data Bit:
8
Parity Bit:
None
Stop Bit:
1
Connection
1:1, RxD, TxD, GND
The communication with the eyevis LC display series is based on an internal
database. For interfacing to external controls, there is an easy to use command
parser for communication.
Commands
The following user commands are available.
SET
Sets parameters and executes commands
GET
Recall actual parameter values
SAVE
Save parameters permanently in memory
As response there will be the
Value
, an
ACK
(success) or
NACK
(error)
returned.
Each display needs to be addressed (ID) from 1 to 999 using rotary switches.
Sending commands using ID=0 is a broadcast to all connected devices. Use
carefully to avoid unintended overwriting of existing values.
Flow control needs to be implemented by control system, using ACK reply
estimation and waiting time up to 200ms between commands.
