Sound meter

[nonnih]

Thanks alot for this great project, i am currently implementing 10x in a factory to measure pollution and this is helping us alot as we can control the HVAC much better in real time and i tried to go with the MQTT way, but your ways is fantastic. There is one thing i see that is missing and would benefit alot is that the enviro+ board has a sound sensor, and with that i could also log "sound pollution". Can you or someone add that to the script to pull the sound. Again thanks!!! :)

[tijmenvandenbrink]

Hi Nonnih, what would you like to measure? I see there are two examples in the enviroplus-python repo. One which measures amps at three given frequencies and the other generating a noise profile (i.e. Bins all frequencies into 3 weighted groups expressed as a percentage of the total frequency range.)

Let me know what makes most sense.

[KindOfOK]

I entirely agree, and would love for some code to be included! I also saw the 'examples' provided by Pimironi but neither seemed to work as-provided out of a clean, fresh install from their script (as of Jan and Feb 2021). Perhaps I'm missing something and/or perhaps the Pimironi examples are borked. Can you provide your experience/success and whether you'd be willing to add any code in your repository and/or contribute any fix upstream to the examples?

Also, for context, I'm pretty new to all this python and sensor world, so I could be missing something!!

[HOD42]

I would suggest using the Pimoroni examples/noise-amps-at-freqs.py as the basis. Personally, I'm just after a general "noise" level, so any/all of the 3 frequencies would be of interest. Maybe treat in a similar way to the PM sensor readings?