5 fan and gpo commands, 1 display return protocol – Matrix Orbital LK202-24-USB User Manual
Page 24
Table 8: Character Values
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Cursor Line
NOTE Custom characters will be erased if any of the “Initialize bar graph” commands
are issued.
Example of a degree symbol;
txUart.sendByte(0xFE); //command prefix
txUart.sendByte(’N’); //custom character command
txUart.sendByte(0x00); //custom character value 0-7
txUart.sendByte(12); //8 bytes to create
txUart.sendByte(18); //the custom character
txUart.sendByte(18);
txUart.sendByte(12);
txUart.sendByte(0);
txUart.sendByte(0);
txUart.sendByte(0);
txUart.sendByte(0);
txUart.sendByte(0x00); //display custom character 0
4.1.7 Remember Custom Character (254 194 [c][8 bytes])
This command will store a custom character to be used with the “Custom startup screen”. It does not
affect or alter the current custom characters that are stored in the unit. The syntax is identical to the previous
command.
5 Fan and GPO Commands
5.1 Display Return Protocol
To facilitate the reporting of information other than keypresses, the “Display return protocol”, (DRP)
was developed. This protocol allows the display to return arbitrary information back to the controller. This
Matrix Orbital
LK202-24-USB
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