VoIP using ESP32-D0WD-V3 and custom hardware feasibility

[goliveira]

Hello,

I am searching for a VoIP solution and found that the Espressif SDK has some examples regarding this subject.

From what I understood, the example only exists for the full board (either ESP32-LyraT-Mini or ESP32-S3-Korvo-2)

I would like to know the feasibility of VoIP using a ESP32-D0WD-V3 chip without an external ADC and without codec.

Is it possible to modify the SDK to make a VoIP work in these conditions? If yes, how long would it be?

Thank you for your time,
Gabriel

[jason.mao]

Hi goliveira，

ESP32-D0WD-V3 does not integrate audio codec, so you can use a PDM microphone to record voice and use the PDM TX for audio output.
However, this hardware structure may have some problems such as poor playback quality and poor echo suppression effect. It is recommended to add a codec to make your product.