ESP8266 for audio recording!
Posted:
Sat Dec 07, 2019 1:26 am
by Subham Hati
Using NODEMCU ESP8266 and MAX9814 Electret microphone module, i want to stream the audio samples to a server. My audio requirements are basic- 8kHz in .wav format.
The closest project I have found is :
https://www.hackster.io/middleca/sendin ... net-f097b4Is this possible?
Re: ESP8266 for audio recording!
Posted:
Fri Dec 13, 2019 4:28 am
by eriksl
Yes, best way is to use an external ADC which is connected to the ESP using I2S. I2C could do as well, I think, for this sample rate, but then you would have to use a very efficient I2C implementation, i.e. not the one that comes from Espressif.
Re: ESP8266 for audio recording!
Posted:
Thu Dec 02, 2021 6:33 am
by White Tiger
Have you managed to make your project work with I2S? I am doing the same audio recording in my project, but cannot figure out how to do it.
Re: ESP8266 for audio recording!
Posted:
Sun Jan 02, 2022 9:53 am
by eriksl
Yes, I2S can be made working, although you'll need some experimenation because the documentation is as good as non-existant. Having some sort of oscilloscope or protocol analyzer nearby will also help.
I am using I2S to generate wave forms for ledpixel devices, also known als ws2812 etc.