BTSX BIT-VWC-409R Manual page 12

screen".
For example: Currently, it is [
window and DP is displayed in small screen window by default.If you need to
adjust the large screen window to DP and the small screen window to HDMI,Then
you need to set [Win] to "1"(window No. 1 means large screen window), [Src] is
"2" (2 means DP input)，After pressing the [Ent] confirmation key，The large
screen window can be switched to DP signal source.Set 【Win】 to "2" （window No.
1 means small screen window），set【Src】to "1"（2 means HDMI input），After
pressing the [Ent] confirmation key，The small screen window can be switched to
HDMI signal source.
RS232 control
Serial port instruction: (parameter setting: baud rate: 9600 bps, data bit: 8 bits,
stop bit: 1 bit, no parity bit)
Function
Splicing mode
Rotate 90 °
Rotate 180 °
] PIP mode,HDMI is displayed in large screen
Byte 1 Byte 2
cmd_head cmd_type
0x66 0x01
0x66 0x02
0x66 0x03
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Byte 3 Byte 4
cmd_data1 cmd_data2
Row Col
Rotate90 0x00
Rotate180 0x00
Byte 5
Check_sum
byte 1 + byte 2
+ byte 3 + byte 4
byte 1 + byte 2
+ byte 3 + byte 4
byte 1 + byte 2