n
Example :
Read the value of left soft edge size 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
\x83
\x02
\xa7
\xff
\xfe
\x01
\x00
\x06
\x07
\xff
\xfe
\x01
\x21
\x83
\x02
\x64
\x0b
\xff
457