I tested the sound module(max9814) with mic on arduino's env.. beaceuse I needed some library(https://github.com/arjo129/uSpeech) with this mic sound module(max9814).
When I test the module using the uSpeech library on arduino, I got some right tunning values (threshold and etc) according to debug_uSpeech app(the tuning app such as file type .ino on arduino env.) for the library to provide and guide on wiki(https://github.com/arjo129/uSpeech/wiki).
Then I ported the library and the debug_uSpeech app to mongoose os based on esp32 module and I succeeded to get some variable analog adc values from the mic sensor module.
But I coudn't get some right tuning values on mongoose os env.. because I was not able to see the definite different values according to tuning items from the ported debug_uSpeech app. Anyway, when I say some sounds into the mic, from analog adc to the values for uSpeech lib. to guide did not seem to variate differently definitely. So I was not tune it and get some tuning values such as threshold.
Let me know what it is the cause of the problem. In addition, I used the one of the adc1 channels on eps32.