Github Fabrikappagency Esp32 Realtime Voice Assistant

Emily Johnson

-Mar 13, 2026, 7:34 AM

github fabrikappagency esp32 realtime voice assistant

I've been working on a super exciting project over the past couple of weeks and couldn't wait to share it with this community. I've built a real-time voice assistant using an ESP32 microcontroller, use as an I/O interface, integrated with a Node Server that uses LangChain and OpenAI. If you're into IoT, embedded systems, or AI, this might interest you. I've documented the entire project in a two-part series, including all the code and detailed explanations: Part 1 - Hardware and C++ Implementation: GitHub Repository: ESP32 Reatime Voice AI Assistant

Welcome back to part two of our ESP32 voice assistant series! In part one, we laid the hardware foundation by configuring the ESP32 to capture voice input and play back responses. Now, we're diving into the exciting realm of giving our assistant intelligence using a Node.js server powered by **LangChain* and OpenAI.* In the first installment, we got our hands dirty with the hardware side of things—connecting microphones, setting up speakers, and ensuring our ESP32 could handle audio input and output. We managed to make the ESP32 record audio and play it back—an essential first step. But let's be real, an assistant that only echoes what you say isn't particularly smart.

So, the next logical step was to infuse it with some intelligence. That's where LangChain and OpenAI come into play. If you missed the part one, here are the relevant medias. The complete source code for this project is available on GitHub: ESP32 AI Assistant Repository Ever since I got my first ESP32 board, I’ve been obsessed with the idea of building my own smart assistant — something like Alexa or Google Home, but completely offline, DIY, and way more... No cloud processing, no big tech snooping on my commands — just aes tiny, powerful microcontroller listening for voice commands and flipping real-world switches.

It started with a simple idea: What if I could talk to my house and it actually listened? Like, literally say “lights on” and see the lamp click on, no phone, no app — just voice and code. So I grabbed an ESP32, a microphone module, some relays, and dove head-first into the world of embedded AI. In this project, I’ll walk you through how to build a voice-controlled smart home assistant using nothing but an ESP32, a few common components, and a bit of clever on-device machine learning. We’re not just talking blinking LEDs here. This is real, usable voice control — trained to recognize your commands, process them locally, and trigger anything from lamps to fans to coffee machines.

And the best part? No internet required. If you’re the kind of person who loves combining wires, code, and a bit of magic to bring your environment to life — you’re in the right place. Gemini-Powered Voice Assistant with ESP32 and Microphone Input include libraries and authenticate API key. schematics of Gemini-Powered Voice Assistant with ESP32 and Microphone Input

This guide shows how to build a AI voice agent device with Realtime AI Speech powered by OpenAI Realtime API, ESP32, Secure WebSockets, and Deno Edge Functions for >10-minute uninterrupted global conversations. An active version of this README is available at ElatoAI. The reference implementation uses an ESP32-S3 microcontroller with minimal additional components: Hardware options: A fully assembled PCB and device is available in the ElatoAI store. Control your ESP32 AI device from your phone with your own webapp. Add the following snippet to your HTML:<iframe frameborder='0' height='385' scrolling='no' src='https://www.hackster.io/techiesms/portable-ai-voice-assistant-using-esp32-gemini-ai-c79b0f/embed' width='350'></iframe>

Ask anything, get answers on the go! Build a portable voice assistant with Gemini AI & ESP32 for seamless, smart voice interactions Ask anything, get answers on the go! Build a portable voice assistant with Gemini AI & ESP32 for seamless, smart voice interactions This project is about creating a compact, low-power, and smart voice assistant that works in real-time using just a single ESP32-S3 microcontroller, a microphone, and a speaker. It listens to your voice, processes your question through Google’s Gemini AI, and speaks out the answer using Text-to-Speech.

It supports general questions, math queries, and even real-time translation – all from your voice. Recent Talks & Demos are for members only You must be an AI Tinkerers active member to view these talks and demos. Learn how to build a real‑time voice assistant using an ESP32 microcontroller, local Node.js server, and LangChain for natural‑language processing. Hi, I have built a Realtime Vocal Assistant that input/output from an ESP32 board, and Langchain agent running on local node server. Your local Alexa but 100 times better.

Making an esp32 microcontroller conversational with WebRTC In this two-part series, we're exploring how to build a real-time voice assistant using an ESP32 microcontroller and the power of AI. In this first installment, we'll focus on setting up the hardware and configuring the ESP32 to handle audio input and output. Then, in part two, we'll dive deep into the C++ implementation, exploring buffer handling, speaker output, and integrating with PlatformIO to bring our voice assistant to life. What was supposed to be a cool 2-day project turned into a 2-week struggle, filled with transistors and WebSocket nightmare. But the result is pretty exciting!

Now I can talk with my AI Agent anytime, just by pressing a button. Before we embark on this project, let's address a few important points: This voice assistant seamlessly merges the realms of embedded systems and modern AI, creating a responsive and intuitive user experience. The key components that power this project include: The complete source code for this project is available on GitHub: ESP32 AI Assistant Repository

Github Fabrikappagency Esp32 Realtime Voice Assistant

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