ESP32 s3 Sense Microphone with Micropython

Products & Technology XIAO
#1

Hi, someone has informations how to use the ESP32s3 sense integrated microphone with micropython? I can use the microphone with C++ and circuitpython samples, but it’s not working with micropython. The only difference I see is that micropython have an additional ws pin that C++ and circuit don’t have. In the esp32s3 schematic the microphone ws pin is grounded and therefore not available.

Mi basic code is following

mic_sck_pin = Pin(42)
mic_ws_pin = Pin(1)
mic_sd_pin = Pin(41)

audio_in = I2S(
    0,
    sck=mic_sck_pin,
    ws=mic_ws_pin,
    sd=mic_sd_pin,
    mode=I2S.RX,
    bits=16,
    format=I2S.MONO,
    rate=16000,
    ibuf=8192,
)

samples = bytearray(2048)
    while True:
        read_bytes = audio_in.readinto(samples)
        # amplify the signal to make it more audible
        I2S.shift(buf=samples, bits=16, shift=4)
        # send bytes to socket
        s.send(samples[:read_bytes])

mic_pin
mic_pin1486×583 72.3 KB

Thank you to anyone can help me
bye

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#2

Hello,

Could you please tell me if you made an progress on reading the sense mic under Micropython? I have one arriving in the post today hopefully and am also keen to get this working. I see what you mean by ws not being supported. Did you try a pin value of -1? Also, do you have the rest of your code for example where you initialise i2s please?

Thanks, G.

#3

I’m looking here in case this helps but again it’d be useful to see more of your code please:

https://docs.micropython.org/en/latest/library/machine.I2S.html

Additionally I got the “-1” idea from the Arduino sketch but I doubt that’s a compatible solution actually.

#4

Hi Grunts, I ended use C++ and got some result. But abandoned the project so I can’t help you with a working solution

1 Like