Re: [bika-dev] [bika-users] Middleware for instrument interfaces

[<np...@it...>]

Dear Lemoene,

In our lab we don't have experience with any of those software... because w=
e don't need it!
It's quite easy from Python to develop data acquisition routines.
Our experience is both on Linux and Windows systems and, aside from the gra=
phical user interfaces, the same code works smooth in both OS.

Basically, for RS232 we use the pyserial module that provides abstraction r=
egarding the OS.
Then we usually build a class representing the equipment and with read() an=
d write() methods. These two methods use functions of the serial
module to communicate in the "language" understood by the equipment .
In one case we even had to build a client-server application to control an =
equipment where, for safety reasons, the equipment itself had to be isolate=
d.
We have done that using an old 486 for the server (a deamon), communicating=
 with the equipment by RS232, and communicating by TCP/IP with a client com=
puter. Everything was in Python.

>From our experience the main problem is to find the right documentation on =
the communication settings and "language" to the equipment. But once
we have that it is quite easy.

Actually on the extensions to Bika we are working on, we include interfaces=
 to several equipments...

If that may help you I can send you Monday our code to control a Mettler ba=
lance. Just tell me if you are interested.

Cheers

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Nuno R. Pinh=E3o
Research Officer
ITN - Nuclear and Technological Institute
Physics Unit & Radiological Protection and Nuclear Security Department
Estrada Nacional 10, 2685-953 Sacav=E9m, Portugal
Landline: +351-21.9946067/316,        Fax:   +351-21.9941525
GPG Key Fingerprint: B343 01CC 6F7E A832 DB03  9DAC F13A 5C41 6857 75BE
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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________________________________________
De: bik...@li... [bik...@li...=
ceforge.net] Em Nome De bika - lemoene [le...@bi...]
Enviado: s=E1bado, 21 de Julho de 2007 11:24
Para: bika user list; Bika dev list
Assunto: [bika-users] Middleware for instrument interfaces

Dear all

Does anybody have experience using middleware such as Winwedge or
Instrument Manager=99 for RS232 data acquisition from lab instruments?

Please suggest/comment

Ideally we'd be looking to establish bi-directional 'interfaces' -
uploading worksheet/tray sample data and downloading the results

Much appreciated
lemoene

Winwedge http://www.taltech.com/products/winwedge.html

Instrument Manager=99
http://www.datainnovations.com/Products/InstrumentManagertrade/tabid/53/Def=
ault.aspx

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