Checkout protocol 06

Question

0.00/5 (No votes)

See more:

Hello all,

I am new to serial programing and I am trying to create a component that communicates with a scale. The scale is plugged to the pc using RS232 port and I have to use the checkout protocol Dialog 06 to communicate with the scale.
The protocol uses checksums for verification at start up and that is where i have problems. I tried to create these checksums using CRC16 and bit rotation like mentioned in the manual of the scale. But when I send these checksums to the sale, the scale always tell me that these checksums are incorrect.

Does anyone know some good books or code samples for usage of this protocol? Especially the authentication process at beginning.

Posted 19-Nov-11 12:38pm

neo308

Updated 4-Sep-19 23:11pm

Add a Solution

Comments

Sergey Alexandrovich Kryukov 19-Nov-11 19:33pm

What, do you have to authenticate to the scale? :-)
I do believe there is not enough information. We do not have your scale programming manual, don't even know the model of the scale.
--SA

Albert Holguin 20-Nov-11 20:42pm

The authentication process is going to be specific to that vendor (or system). Even the CRC16 calculation has to be specified with a polynomial. Here's a calculator[^] that does it for you (so you can check your code) but again, the polynomials are system dependent.

neo308 24-Nov-11 16:15pm

Yes that solved my problem. The polynomials used in CRC16 is vendor dependent. Thanks for your hint.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Mehdi Gholam · Answer 1 · 2011-11-19T19:50:00

Solution 1

Contact the scale's hardware manufacturer for their SDK.

Posted 19-Nov-11 19:50pm

Mehdi Gholam