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Topic: SIM800 GSM Module and PCM (Read 144 times) previous topic - next topic


Jul 09, 2019, 07:08 pm Last Edit: Jul 09, 2019, 07:09 pm by Mesmer

I need to get audio data from a GSM module into Arduino or ESP32 and then interface this data to Google Speech to text.

I noticed that the SIM800 modules have a PCM interface:

Would it be possible to use already existing libraries for I2S in order to get this data? Or do i need to code the serial communication all from scratch??

From what i gathered the PCM "interface" is very similar to I2S.


I have tested SIM800 for my project and it seems that do not support PCM output. When switching from analog audio to PCM audio by its AT commands, the analog audio is stopped but there is no any clock on PCM port.

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