beacon for nrf52

[stefano.luna]

Hello!

I have to sample audio signal from a microphone (MAX 9814 adafruit) with the nrf52 board. I use the saadc and then I perform a FFT of the data using the sdk 13 examples. My idea is to sample for a very little time (e.g. 10 ms), do the FFT and send data to a raspberry PI, repeating this loop every a certain amount of time.

I need to deploy many microphones to detect noise from different places and i'd like to choose some beacons to deploy the microphones. I found the page below but there are too many beacons and I'm not sure on which one I should rely... any suggestion?

Thank you!

www.nordicsemi.com/.../3rd-Party-Bluetooth-low-energy-Modules

[endnode]

You mean modules? (Beacon is typically called "simple BLE broadcaster") However only you know about parameters how to chose: how many GPIO lines you need, what power consumption you are aiming for, what exact form factor/dimensions you need, what price at what quantity, what is availability at your region/distributors, what certifications you need etc.

[stefano.luna]

Yes I meant those modules. I'm a beginner in this field, so I don't have much information. For now I need around 100 modules as small as possible, with about ten GPIO lines (the microphone has 5 pins, but i don't know if more will be needed). I don't care about the price but the power consumption should be the smallest possible.

[endnode]

Well I'm afraid there is no one here who would try the modules before you or for you so you either pick some based on the spec sheet (knowing that vendor can put pretty anything on the paper;) or purchase few and do your pre-selection in the lab (which will be probably painful/boring testing with arguable ROI;).

[stefano.luna]

oh, not good news...thank you anyway for your replies!

[endnode]

(oh yes, I'm sorry, there seems to be no free hugs and lunches in this universe;)