Barco Projector User Manual page 80

Example :
Clear all data from the 2 line LCD of a projector with
address \x01.
Transmit
Start
Projector address
Command[0]
Command[1]
Checksum
Stop
Receive (acknowledge)
Start
Projector address
Command[0]
Command[1]
Checksum
Stop
2 line LCD, write clear
\xfe
\x01
\x7a
\x85
\x00
\xff
\xfe
\x01
\x00
\x06
\x07
\xff
80