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dhvie / enviro-plus

Pimoroni Enviro+ parallelized API wrapper with MQTT integration
MIT License
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WARNING:root:Failed to read PMS5003 #2

Closed ftosteve closed 4 years ago

ftosteve commented 4 years ago

Today I have been trying to run your code and keep getting numerous messages stated above. It's on a Pi1B(newest), with a Enviro+ and PMS5003, all brand new. If I run Pimoroni's particulates.py it runs fine and continuous with no errors so the equipment is fine.

After several of the warning's it sometimes crashes out with the following error: Process Process-1: Traceback (most recent call last): File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 501, in read 'device reports readiness to read but returned no data ' serial.serialutil.SerialException: device reports readiness to read but returned no data (device disconnected or multiple access on port?)

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "/usr/lib/python3.7/multiprocessing/process.py", line 297, in _bootstrap self.run() File "/usr/lib/python3.7/multiprocessing/process.py", line 99, in run self._target(*self._args, *self._kwargs) File "/home/pi/.local/lib/python3.7/site-packages/enviro_mqtt/enviro.py", line 272, in __run_loop func(args, **kwargs) File "/home/pi/.local/lib/python3.7/site-packages/enviro_mqtt/enviro.py", line 256, in display_all pms = self.particulates File "/home/pi/.local/lib/python3.7/site-packages/enviro_mqtt/enviro.py", line 236, in particulates pms_data = self.pms5003.read() File "/usr/local/lib/python3.7/dist-packages/pms5003-0.0.5-py3.7.egg/pms5003/init__.py", line 125, in read sof = self._serial.read(1) File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 509, in read raise SerialException('read failed: {}'.format(e)) serial.serialutil.SerialException: read failed: device reports readiness to read but returned no data (device disconnected or multiple access on port?)

Any ideas? Thanks Steve

dhvie commented 4 years ago

I have the same setup as you. I think I have a fix for you that I must have forgotten to push.

Let me take a look tonight and hopefully we can get you up and running.

I find that after a few hours of running the PMS5003 becomes unresponsive for a bit (i.e. the errors you are posting) and then eventually recovers.

dhvie commented 4 years ago

I think this might be a race condition. (multiple access on port - part of the error). I'll take a look how this can be fixed

dhvie commented 4 years ago

I just updated the code. Give this a go and let me know if you still have the same errors. I'm not getting them on my test setup at the moment.

ftosteve commented 4 years ago

Not at desk right now. Will try updated code first thing in the morning and let you know. Thanks for the quick response.

ftosteve commented 4 years ago

Well it seems your update did the trick. Thanks so much for the updated code, much appreciated. It's now been running 5 hours straight with no errors :o) On a seperate note, I dont suppose you know of any code to use the MEMS microphone to get an overall A-weighted SPL value? Thanks again.

dhvie commented 4 years ago

I had actually forgotten there was a mic on it. I don't know of any code that will do it out of the box, but it doesn't seem to hard. I'll take a look on the weekend as I will want to upgrade my deployment too. :)

Sounds good?

ftosteve commented 4 years ago

Lol. Easily done :o) Looking around it soounds sound is quite complex. If you get change to have a look that would be really appreciated. Sounds great :o)

Pimoroni do 2 examples but I believe the numbers output or amplitue rather than SPL. https://github.com/pimoroni/enviroplus-python/blob/master/examples/noise-profile.py https://github.com/pimoroni/enviroplus-python/blob/master/examples/noise-amps-at-freqs.py

If you get SPL working then I owe you a few drinks ;o) Thanks again.