Hatteland Display 26 inch - HD 26T21 MMC (Widescreen) - Manual (Page 19)

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Serial/Ethernet Communication (SCOM) Interface
IND100084-14
"LIS" - Luminance and Environment Sensor Measurement
Sending this command the light sensor on the Glass Display Control™ (GDC) will return a value about luminance of
environment.
Example:
Command to query Light Sensor:
0x07 0xFF 0x4C 0x49 0x53 0x00 0x11
Acknowledge: LIS value is "0"+"0"+"9"+"9"+"9" = "999":
0x06 0xFF 0x4C 0x49 0x53 0x05 0x0D 0x30 0x30 0x39 0x39 0x39 0xF4
“MAN” - Manufacturer ID
This command is sent to the unit to request Manufacturer ID. No data shall be sent with this command. The unit will
reply to this command with an ACK attention code. The DATA field indentify the manufacturer in a text string.
Example:
Query Manufacturer ID:
0x07 0xFF 0x4D 0x41 0x4E 0x00 0x1D
Acknowledge Manufacturer ID “JHD”:
0x06 0xFF 0x4D 0x41 0x4E 0x03 0x1B 0x4A 0x48 0x44 0x29