Zebra Scanner DS457 advice

Hello there,

I am new to Zebra Scanner DS457 mixed mount scanner and I need some help as below,

I would like to control LED on or LED Off for above scanner using SSI programming via Serial interface, hence I wish to know how to do it?

For example,

LED OFF

Where

Length = 05h

OPcode = E8h

Message Source = 04h

Status = 1100

LED Selection = 1111111 or 0000000

Checksum = ?

So,

Refer to example as above

05 E8 04 1100 0000000 ? <- this is correct packet format to send or requires to convert to Status, and LED selection into hex as well? how about Checksum?

Kindly refer to Simple Serial Interface Programmer Guide Page 2 - 49  as attached.

In addition, before using SSI programming should I need to do anything else? For example, to program D457 scanner to use SSI programming.

Kindly please give me some examples.

Many Thanks.

Walter.