n
Example :
Read the value of red soft edge black level on a projector
with address \x01. Suppose the value is 100 (\x64).
Transmit
Start
Projector address
Command[0]
Command[1]
Command[2]
Checksum
Stop
Receive (acknowledge)
Start
Projector address
Command[0]
Command[1]
Checksum
Stop
Receive (answer)
Start
Projector address
Command[0]
Command[1]
Command[2]
Data[0]
Checksum
Stop
\xfe
\x01
\x21
\x84
\x00
\xa6
\xff
\xfe
\x01
\x00
\x06
\x07
\xff
\xfe
\x01
\x21
\x84
\x00
\x64
\x0a
\xff
449