Using Multiple PPK2 Simultaneously

[akash1]

Hello,

I am looking to use multiple PPK2 to measure current across 2+ voltage rails at the same time. Is there a way to connect 2+ PPK2 and synchronize the data from the 2 instruments, either in the tool or outside?

[Øyvind]

Hello, apologies for the late reply on this. 

I've discussed internally and our developers tell me that it is currently not supported but that the data recorded uses absolute time which can be used to combine/sync data outside of the app. 

Kind regards,
Øyvind

[akash1]

Hi Øyvind , hope you are doing well.

Thanks for feedback. Do you have anything that can be used as a starting point for this endeavor?

[Øyvind]

Hello again,

I have forwarded the question and awaiting response from our team. I expect to have an answer on Monday or Tuesday. 

Kind regards,
Øyvind

[akash1]

Hi Øyvind ,

I tried to look into this today but when selecting Absolute Timestamps, it is showing absolute timestamps in the tool but when I export the data to .csv to combine the data outside the app as suggested, it only has relative timestamps. Is this a bug?

Perhaps the starting absolute time could be captured in the exported file name but that file name is associated to the time at which the export is made rather than the start or end time of the capture and also only has the time up to seconds rather than 10us resolution (aligning with the chosen 100k sample rate).

[Øyvind]

Hello, 
our developers inform me that the absolute time stamp is not exported to the .csv, but they have taken note and added a feature request for this. They state:

The absolute time in only in the metadata.json and is in https://github.com/NordicSemiconductor/pc-nrfconnect-ppk/blob/f60119b807f0c83c33ce9dcb2e10600ebc59c486/src/utils/saveFileHandler.ts#L32 -> `startSystemTime`

Let me know how that works for you

Kind regards,
Øyvind