I have written a code which performs a connection to a NTRIP caster and receives data in RTCM3 format.
I have been able to decode these messages and I can distinguish them in base to their code such as (1006, 1008, 1013, etc..).
But I don't know which of this data I have to use to correct my GPS position and how to perform this correction.
Could you give me some hints or references?
Always mentioned which module you're using, what are the hardware interfaces.
I don't think you need to decode the data coming from the NTRIP server. Most of the time the RTK module does that on his own, all you have to do is redirect the data coming from the NTRIP server to the RTK module (without changing anything).
Related
In Order use a PLC as a Client (formerly “Slave”), one has to configure the PDO channels, since the default values of the manufacturer are often not suitable. In my case, I need the PDOs so send INT valued instead of the default UNSIGNED8 (see. Picture).
Therefore my question: What kind of workflow would you recommend, to map the CANopen Client PDO channels?
I found the following workflow suitable, however I appreciate any improvements and recommendations from your side!
Start by locating the .eds file from the manufacturer. The image show this in the B&R Automation Studio Programming Environment
Open the file in a eds. Editor. I found the free Vector CANEds Editor very useful. Delete all RxPODs and RxPDO mappings that you don’t need.
Assign the needed Data Type (e.g. INTEGER16) and Channel Name (“1 Byte In (1)”).
Add the necessary PDOs and PDO mapping from the database. (This might actually be a bug, but if you just edit the PDOs without deleting and recreating them, I always receive error messages)
Map the Date to the Channels
Don't forget to write the number of channels in the first entry (in this image: 1601sub0)
Check the eds file for Errors (press F5) and copy&paste the eds file to the original location point 1.)
Add the PLC Client device in Automation Studio and you should see the correct mappings.
(PS: I couldn't make the images smaller ... any recommendations about formating this question are welcome!)
I'd like to store some JMeterVariables together with the sampleResults to an influxdb using a BackendListenerClient for influxdb (I am using package rocks.nt.apm.jmeter to get the raw results).
My current test logs in for a random customer requests some random entities and logs out. Most of the results are within a range, I'd like to zoom in to certain extreme sample results, find out for which customer / requested entity these results are. We have seen in the past we can find performance issues with specific configurations this way.
I store customer and entity ID in a variable. My issue is that the JMeterVariables are not accessible from the BackendListenerClient. I looked at the sample_variables property, but this property will store the variables in the sampleEvent, which is not accessible in the BackendListener.
I could use the threadName, or sample label to store the vars, but I saw the CSVwriter can actually write the var values from the event, which is a much nicer solution.
Looking forward on your thoughts,
Best regards, Spud
You get it right - the Backend Listener is not customizable in terms of fine-shaping the data you're sending to Influx.
Alas.
However, there's a Swiss Army Knife always available in JMeter: the JSR223 components.
The JSR223 listener, in your case.
The InfluxDB line protocol is simple as simple could be, the HTTP/Rest libraries are
in abundance (Apache HTTP must have been already included with standard JMeter, to my recollection, no additional jars needed) - just pick it all up, form your timeseries as you like, toss it towards your InfluxDB REST endpoint, job's done.
Could you explain what is the usage of Modules with select query?
For example if I write (as shown on this page https://cumulocity.com/guides/users-guide/administration/):
select * from MeasurementCreated
Is it useful to get real time notifications by subscribing of the related channel? Is the module reachable by an angularJs Module? Can this module be used in other CEL statements?
Just selecting data without putting it into another stream can make sense in the case you want to make this data available via a real-time channel to some external application (this could be of course AngularJs).
Take a look at this section in the docs: http://cumulocity.com/guides/reference/real-time-statements/#notifications
This very one example though does not make a lot of sense because raw measurement data is already provided on a real-time channel
http://www.cumulocity.com/guides/reference/measurements/#notifications
As for the second part of the question:
Yes it is possible to communicate with other modules within your tenant.
e.g. You can declare some stream in module a and it will be available in module b.
It's basicly all in the title, how do I know or how can I access the duration of a soundNode in Web Audio API. I was expecting something like source.buffer.size or source.buffer.duration to be available.
The only alternative I can think of in case this is not possible to acomplish is to read the file metadata.
Assuming that you are loading audio, when you decode it with context.decodeAudioData the resulting arrayBuffer has a .duration property. This would be the same arraybuffer you use to create the source node.
You can look at the SoundJS implementation, although there are easier to follow tutorials out there too.
Hope that helps.
Good and bad news; nodes do not have length - but I bet you can achieve what you want another way.
Audio nodes are sound processors or generators. The duration of a sound processed or made by a node can change - to the computer it is all the same, lack of sound is a buffer full of zeroes instead of other values.
So, if you needed to dynamically determine the duration of a sound, you could write a node which timed 'silences' in the input audio it received.
However I suspect from your mentioning of meta data that you are loading existing sounds - in which case you should indeed use their meta data, or determine the length by loading into an audio element and requesting the length from that.
I am using GPS module for my application. I want only the RMC data. So what am I supposed to do in my code to get only this data, i.e all the other formats like GGA,GSA,VTG should be disabled.
Please Help.
Thanks
You cannot disable the other messages, and there is no reason to do so. Some GPS units support commands to enable/disable messages, but it is anything but standard.
Simply use a switch statement in your code on the sentence identifying field, and have a case block for GPRMC.