Barco Projector User Manual page 74

Transmit
Start
Projector address
Command[0]
Command[1]
Checksum
Stop
Receive (acknowledge)
Start
Projector address
Command[0]
Command[1]
Checksum
Stop
Receive (answer)
Start
Projector address
Command[0]
Command[1]
Data[0]
Data[1]
Checksum
Stop
2 line LCD, read format
\xfe
\x01
\x7a
\x06
\x81
\xff
\xfe
\x01
\x00
\x06
\x07
\xff
\xfe
\x01
\x7a
\x06
\x18
\x02
\x9b
\xff
74