pin write and python sleep() issue? about pyfirmata HOT 5 CLOSED

Hmm, yeah processes will fight for CPU time. Get a bigger one ;).

Note that pyFirmata is great for prototyping and getting stuff working. If you some high performance or more stability, it often pays of to write some stuff that runs directly on the Pi (and thus is not affected by Chrome and the likes). The waveform function is easily ported to C++, and you can set it up as a sysex function. That way you can still call it from python, but it runs directly on the Pi.

Good luck!

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I am not completely sure what problem is. You seem to have it working when you don't put in a time.sleep() right?

Google Chrome being of influence on the sleep or execution time seems highly unlikely, unless it's eating all your CPU.

Also be aware that if you run this on Python 2, 1/1000 == 0.

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Thank you for the response. It does work fine without time.sleep(). I was able to reproduce the problem by putting the block of codes into a second thread, and it slowed down regardless of what is opened. Thinking of how to fix that now because my application needs to send data constantly and I don't want it to be interrupted by other apps. And it's more like python issue itself, not from the serial connection or so.
Again, thanks a lot man.

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I finally got it working. It's the OS system. Not pyfirmata :D

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Ah sweet!

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