Datasheet

4
4.1 ID Setting
Each sign needs to have an ID, so you should set the sign ID first by the using PC software,
(Use this command only when you want to change the sign ID) only one sign could be set at
a time.
.
Command Format
PC -> MCU :
<, > Are ASCII code 3C, 3D
ID Are character "I" & "D" (Upper case)
XX Are the Hex number 01 to FF in ASCII format (i.e. maximum 255).
MCU -> PC :
XX Are the Hex number 01 to FF in ASCII format return from MCU
.
Note: 00 represents global call, i.e. 00 is broadcast ID.
So the Sign ID to be set begins from 01.
4.2 Message / Control
There are 6 kind of message / control transfer
- Real Time Clock Setting
- Sending Page Message
- Sending Schedule
- Sending Graphic Bolock
- Delete => Page
=> Schedule
=> All
- Sending Default
Format :
PC -> MCU
<IDXX> are the ID of the designated LED board
<, I,D & > are ASCII character “<”, “I”, “D” & “>”
XX denotes the ID of the designated LED Board
Values are two ASCII character from 00-FF
Data packet denotes data content of this transmission string
[CS] denotes the Xor Result of the data content(Data Package).
[,C,S &] are two ASCII character from 00-FF
<E> Denotes the Ending code of transmission
<,E & > are ASCII character “<”,”E”, and “>”
MCU -> PC ACK /NACK /No Response
1. ACK : Message with the correct Xor Result for the designated ID is
received
2. NACK : Wrong xor result for the designated ID is received
<ID><XX><E>
XX
<IDXX> | Data packet | CS | <E>