Serial communication - A simulator based on request msg from other device, it should send response.

[aniketjha]

Hi,

I want to create a simulator, which checks the request msg received from other devices via serial port and based on the request simulator should response msg.

For example: 

Other Device Request to my simulator  : 2B 2B 2B

My Simulator  Response : 65 6E 74 72 61 4E 45 54 3E 20

Also, there are series of request message send sequentially to the simulator and after response is sent by simulator for each request - login successful.

Any heads up on how to proceed is highly appreciated.

Thanks

[crossrulz]

I would recommend a sort of state machine.  Each step in the state machine is to look for the message.  Do you have a better description of the full message protocol?

[aniketjha]

Hi Crossrulz,

It is a serial data protocol and data are in ASCII format.

Can you post a simple vi if possible for my better understanding, so that i can take it up from there.

Thanks

Aniket

[crossrulz]

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aniketjha wrote:

It is a serial data protocol and data are in ASCII format.

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That is a start.  Do the messages you receive end with a termination character (typically a Line Feed, 0xA, \n)?

[aniketjha]

Yes, it ends with termination character...

[crossrulz · Accepted solution]

I originally wrote this for a nugget series that I have been working on here in there.  Should at least get you started.

[aniketjha]

Thanks Crossrulz, this will work.

I will let you know once i done with the vi.

[aniketjha]

Hi Crossrulz,

1 simple doubt i have and it is not related to this topic, is there any way i can provide enable/disable button to create/clear communication loss via serial port.

Sorry for pulling up this simple question in this thread.

Thanks

Aniket

[crossrulz]

You can use a State Machine with states like "Connect", "Read", "Close", etc.  So when you detect a connection loss, you can go back to the Connect state or an idle state waiting for somebody to press a button to reconnect.

[aniketjha]

I am actually new to this Crossrulz, if i get some sample vi on state machines particular to my requirement i will pick it up from there.

Aniket