Hello everyone,
I'm testing the BMP5 SDK on LabVIEW but I'm having problems so far.
I've loaded the simplepb.dll library on LabVIEW. It ask me for a header file before loading the dll, so I use the one that's in the C++ example.
Because I'm just starting, I'm just trying to open and close a serial port (using the OpenPort() and ClosePort() functions). At first everything seemed to be ok because the code returned by the functions was 0, but when I tested trying to open serial ports that didn't exist or were already open, the functions still returned code 0, and not -1 as expected.
Anyone has experience using BMP5 in LabVIEW?
Thank you for your attention.
I'm not sure OpenPort() is the best for testing functionality. You might try GetDLLVersion() first. This will tell you if your header file is actually working.
Starting with version 2 of simplepb.dll, the OpenPort() function will only set up the parameters for future communications it will not attempt to open the port until a call is made that will require actual communications with the datalogger.
Hello,
I've tried using the GetDLLVersion() function, but I'm receiving weird strings (&#"_~). The returned code is still 0.
I have tried passing the return_data argument as a C string pointer and as a pointer to an array of bytes, with no luck.
Any advice would be appreciated.
Thank you.
Assuming you are using the v4.5 BMP5 Direct SDK, you should take a careful look at the MS-VS2015 C++ example code.
In earlier SDKs the C++ project was called Mfc, MFC-VS2013, or MSC++. Take a look at the file simplepb.h. This shows how each of the SDK commands should be declared in a C/C++ environment. My understanding is that LabView would make declarations for these functions in a very similar, if not identical way. This should clarify for you where pointers are used as arguments in the function calls, etc.
Then by looking at the C++ code (SimpleExample.cpp, ConnectTabDlg.cpp, MainDlg.cpp) you can see how these functions are called. I think if you try to use LabView to declare and execute the calls in the same way as the C/C++ code that it will work for you.
Also - remember that there are other ways for LabView to communicate with a CR1000 : RS-232 via C-ports, and MODBUS. The LoggerNet SDK can also be used - these are ActiveX/COM controls that can be embedded into a LabView VI. If the regular LoggerNet software is available and running, then the PC-OPC server can be used to obtain datalogger data via LabView.
Another approach - if the CR1000 has an IP address is to use Web-API commands - basically a set of specific URLs that can query data out of the datalogger via HTTP (see Chapter 4 of the CS Web Server manual:
https://s.campbellsci.com/documents/us/manuals/csi-web-server.pdf )