Serial port sending code value / baud rate 9600	Function
0x1	Single channel 1
0x2	Single channel 2
0x3	Single channel 3
0x4	Single channel 4
0x5	Single channel 5
0x6	Single channel 6
0x7	Single channel 7
0x8	Single channel 8
0x10	Audio 1
0x11	Audio 2
0x12	Audio 3
0x13	Audio 4
0x14	Audio 5
0x15	Audio 6
0x16	Audio 7
0x17	Audio 8
0x20	Left and Right channels 1
0x21	Left and Right channels 2
0x22	Left and Right channels 3
0x23	Left and Right channels 4
0x24	Up and down channel 1
0x25	Up and down channel 2
0x26	Up and down channel 3
0x27	Up and down channel 4
0x40	Quad Channel 1
0x41	Quad Channel 2
0x80	Octal Channel
Added instructions
0xf7	Switch to 720P output
0xf1	Switch to 1080P output
0xf2	Switch to 2560x1600 output
0xf3	Switch to 2560x1400 output
0xf4	Switch to 1080P output
0xff	reboot the device
0xe0 0x00 0x01 0x02 0x03	Set 4-screen display. The value range of the selected input video is 0x00 ~ 0x07. The next 4 bytes of data cannot be repeated.
0xe1 0x00 0x01	Set 2-screen left and right display. The value range of the selected input video is 0x00 ~ 0x07. The next 2 bytes of data cannot be repeated.
0xe2 0x00 0x01	Set 2-screen up and down display. The value range of the selected input video is 0x00 ~ 0x07. The next 2 bytes of data cannot be repeated.
0xe3 0x00 0x01	Set 2-screens left and right 16: 9 display, the selected input video value range is 0x00 ~ 0x07, the next 2 bytes of data cannot be repeated;
0x81	Mode 1
0x82
0x83
0x84
0x85
0x86
0x87
0x88
0x91	Mode 2
0x92
0x93
0x94
0x95
0x96
0x97
0x98
0xa1	Mode 3
0xa2
0xa3
0xa4
0xa5
0xa6
0xa7
0xa8
0xa9	Mode 4
0xaa
0xab
0xac
0xad	Mode 5
0xb3	Mode 6
0xae	8-screens logo interface
0xf5		4K/1080P switch
0xf8		Open channel LOGO
0xf8		Close channel LOGO
this X no need to type/input