In this project we see how to make a walkie-talkie using an ESP32; audio data is transmitted via UDP or ESP-NOW transmission. So the Walkie-Talkie will work even without a WiFi network! The system is based on an I2S microphone and an I2S amplifier, but it will work equally well with analog microphones and headphones with a small change in the code.
The schematic is very simple: using I2S boards for both the microphone and the speaker we made the wiring to the ESP32 very simple. We have added extra circuitry to the board to create a clean power supply for the microphones, specifically we take a direct power supply from the battery, filter it with an LC filter and then pass it to a Low Drop Out regulator. This gives us a nice and clean power supply for microphones that removes many noise problems.
Hi! I have a question. I am working on this project, and I was wondering if you could help me. I wanted to ask how are speakers generally programmed if we are receiving an audio signal from a different device. Would I use the DAC of the microcontroller I am using or would I need to use a communication protocol. I am an Electrical engineering student, but my project requires coding. Thank you
Sarei interessato al code..
Gentilmente potresti fornirmelo?
Please can i have a code?