Questions related to AggreGate device drivers, reading and updating data from/in various devices and data sources.
4 posts • Page 1 of 1
Hi, I'm looking at building a LabVIEW device driver and am considering just parsing data using the flexible driver, but being new to all this I'm not sure how much of the expressions work for parsing JSON table data. Ideally, I'd like to build a dynamic metadata driver in LabVIEW so I can easily add channels and hardware, but need help with the expressions.
Are there any example devices or JSON parsing devices in the community or a place to see some of these and how they are built? Not much help in the help document aside from the what it all is, nothing on real world parsing examples, which are needed.
Any suggestions would be great.
Hi I'm still trying to get some custom device communications working and can't figure out how to use the flexible device or just a EthernetTCP device to parse the data. I can get either connected fine and the input string messages are showing my line of data such as (12.5, 344.3, 33.2) but I can figure out how to parse that into fields within a variable (assuming that is the way to do it, say in the flexible driver).
I can customize the data string from my other system to be anything I want, and really just want to parse a set of data stream in for live display/logging.
Any help with how to do this using these darn (so far confusing) expressions for this kind of data?
I can make any format to help, but can't seem to figure out how to even separate 2 comma delimited fields yet. More complex JSON structure would be nice too though.
I think you don't need to use a flexible driver. What protocols are supported by your device?
You need to connect it to the AggreGate via the right protocol and use tableFromJson() function for collected data.
You can find the function description following this link https://aggregate.tibbo.com/docs/en/ls_ ... ctions.htm.
OK, its just a pure TCP/IP device sending datastreams. I can write any data I want, but am not using any particular protocol on top of TCP. I'll have a look at that function though, would be great to convert it directly into a table. Thanks for the tip.
4 posts • Page 1 of 1
Users browsing this forum: No registered users and 2 guests