Read real time data on raspberry PI

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Cosimo Mercuro
Cosimo Mercuro 2021-2-10
回答： Prasanth Sunkara 2021-2-18
Hi.
Is there any way to read realtime, live, data produced on a raspberry PI directly on Matlab ( don't using ThigSpeak)?
I.e. I'd like to read live Raspberry CPU temp in matlab without using ThingSpeak.
Any idea?
Thanks in advance

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回答（3 个）

Manash Sahoo
Manash Sahoo 2021-2-10
I'm not experienced with directly reading from raspberry Pi/arduino, but this link might help you out.
https://www.mathworks.com/help/supportpkg/raspberrypiio/ref/raspi.serialdev.read.html
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Cosimo Mercuro
Cosimo Mercuro 2021-2-11
Hi Manash.
Thanks for you reply.
Actually I need to read a data that are produced from a runnig code on Raspberry PI.
Like CPU temp in this example:
How to Send Data to ThingSpeak Cloud using Raspberry Pi (iotdesignpro.com)
I haven't nay serial device attached to my Raspberry Pi

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Vinod
Vinod 2021-2-11
Have you looked at the Raspberry Pi Support Package?
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Cosimo Mercuro
Cosimo Mercuro 2021-2-12
Hi Vinod.
Thanks for you reply.
Yes, I've read carefully all docs on Raspberry Pi Support Package but I don't know how create a "link" between Matlab and Raspberry so that , i.e., every value of the CPU's temp printed on Raspberry (and that I can view by means Putty) at the same time will be trasferred to Matlab.
I can do this via ThingSpeak but not directly from Raspberry PI to Matlab on my PC.
Obviously Rasberry and my PC are conntected on the same LAN.
Any idea?

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Prasanth Sunkara
Prasanth Sunkara 2021-2-18
Hi Cosimo,
One approach is to use the "timer" feature in MATLAB and in the timer callback, you can call the function which reads the cpu temperature( probably using "system" command of Raspbery Pi Support package).
Please see the below timer example for reference:
https://mathworks.com/help/matlab/ref/timer-class.html#btwomz1-13
Alternatively, you may find the "Raspberry Pi Resource Monitor App" handy for similar usecases.
https://mathworks.com/help/supportpkg/raspberrypi/ug/raspberrypiresourcemonitor-app.html
Thanks,
Prasanth

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