MeetingRecorder

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MeetingRecorder

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AI-powered meeting recorder on XIAO ESP32-S3 — live transcription, summaries, and AI chat

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- ARCHITECTURE.md
- FILES.md
- MeetingRecorder_Features.html
- MeetingRecorder_Features.pdf
- README.md
- ShubhJson_LICENSE.txt
- - ArrayData.hpp
  - ArrayImpl.hpp
  - ElementProxy.hpp
  - JsonArray.hpp
  - JsonArrayConst.hpp
  - JsonArrayIterator.hpp
  - Utilities.hpp
- - CollectionData.hpp
  - CollectionImpl.hpp
- - DeserializationError.hpp
  - DeserializationOptions.hpp
  - deserialize.hpp
  - Filter.hpp
  - NestingLimit.hpp
  - Reader.hpp
- - JsonDocument.hpp
- - EscapeSequence.hpp
  - JsonDeserializer.hpp
  - JsonSerializer.hpp
  - Latch.hpp
  - PrettyJsonSerializer.hpp
  - TextFormatter.hpp
  - Utf16.hpp
  - Utf8.hpp
- - Alignment.hpp
  - Allocator.hpp
  - MemoryPool.hpp
  - MemoryPoolList.hpp
  - ResourceManager.hpp
  - ResourceManagerImpl.hpp
  - StringBuffer.hpp
  - StringBuilder.hpp
  - StringNode.hpp
  - StringPool.hpp
- - SerializedValue.hpp
- - endianness.hpp
  - ieee754.hpp
  - MsgPackBinary.hpp
  - MsgPackDeserializer.hpp
  - MsgPackExtension.hpp
  - MsgPackSerializer.hpp
- - arithmeticCompare.hpp
  - convertNumber.hpp
  - FloatParts.hpp
  - FloatTraits.hpp
  - JsonFloat.hpp
  - JsonInteger.hpp
  - parseNumber.hpp
- - JsonObject.hpp
  - JsonObjectConst.hpp
  - JsonObjectIterator.hpp
  - JsonPair.hpp
  - MemberProxy.hpp
  - ObjectData.hpp
  - ObjectImpl.hpp
- - alias_cast.hpp
  - assert.hpp
  - attributes.hpp
  - ctype.hpp
  - integer.hpp
  - limits.hpp
  - math.hpp
  - pgmspace.hpp
  - pgmspace_generic.hpp
  - preprocessor.hpp
  - type_traits.hpp
  - utility.hpp
- - CountingDecorator.hpp
  - measure.hpp
  - serialize.hpp
  - Writer.hpp
- - IsString.hpp
  - JsonString.hpp
  - StringAdapter.hpp
  - StringAdapters.hpp
  - StringTraits.hpp
- - Converter.hpp
  - ConverterImpl.hpp
  - JsonVariant.hpp
  - JsonVariantConst.hpp
  - JsonVariantCopier.hpp
  - JsonVariantVisitor.hpp
  - VariantAttorney.hpp
  - VariantCompare.hpp
  - VariantContent.hpp
  - VariantData.hpp
  - VariantDataVisitor.hpp
  - VariantImpl.hpp
  - VariantOperators.hpp
  - VariantRefBase.hpp
  - VariantRefBaseImpl.hpp
  - VariantTag.hpp
  - VariantTo.hpp
- compatibility.hpp
- Configuration.hpp
- Namespace.hpp
- version.hpp
- - api.cpp
  - api.h
  - api_chat.cpp
  - api_chat.h
- - audio.cpp
  - audio.h
- - config.cpp
  - config.h
- - globals.h
- - ShubhJson.h
  - ShubhJson_core.h
  - ShubhJson_core.hpp
- - process.cpp
  - process.h
- - ntp_time.h
- - html_pages.h
  - web_extras.cpp
  - web_extras.h
  - web_handlers.cpp
  - web_handlers.h
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index.html
manifest.json
MeetingRecorder.ino
README.md

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> **Pocket-sized AI meeting recorder you can build yourself.**
> Live transcription, comprehensive summaries, unlimited duration, and chat with your meetings — all on a XIAO ESP32-S3.

A standalone meeting recorder built on the **Seeed XIAO ESP32-S3 Sense**. Press one button, talk freely, and walk away with an accurate transcript, an AI-generated multi-section summary, and the ability to chat with the meeting after it ends. No phone required. No subscription required. Just hardware, WiFi, and a microSD card.

> Built and created by **[Shubh](https://github.com/Shubhjaiswal408)** · Showcased on **[techiesms](https://www.youtube.com/@techiesms)**

---

## ✨ Features at a glance

### 🎙️ AI Transcription, Live
Every word from every speaker is transcribed in real time by **ElevenLabs Scribe** — handles multiple voices, accents, and technical terms. Accurate text appears chunk by chunk while the meeting is still in progress.

### 🧠 Comprehensive Meeting Summaries
**GPT-4o-mini** generates a rolling summary during the meeting and a polished multi-section final report the moment you press stop. Overview, Key Discussion Points, Decisions Made, Action Items, and Names + Dates + Numbers — ready before you even leave the room.

### ♾️ Unlimited Duration
A built-in **map-reduce summarisation pipeline** handles meetings of any length. The transcript is streamed off SD in 25 KB segments, each summarised separately, then merged into one polished summary. A 4-hour conference is summarised as accurately as a 5-minute test — without ever running out of RAM.

### ↺ Regenerate Summary
A button on every past-meeting card re-runs the full summary pipeline against the saved transcript. Recover meetings whose original summary call failed, or upgrade older meetings after prompt improvements — no need to record again.

### 💬 Chat With Your Meetings
Ask anything about a current or past meeting and get instant grounded answers, with conversation memory for natural follow-ups. Find decisions, list action items, or summarise in three bullets — without scrolling a single transcript.

### 🔌 Plug-and-Record. No Computer Needed.
Standalone hardware with a one-touch record button and a smart WiFi setup wizard. First boot launches a hotspot for configuration; once your home WiFi is saved, the device is reachable at **`http://meetingrecorder.local`** from any phone or laptop on the same network — your devices stay on home WiFi, internet keeps working.

### 📱 Beautiful Dashboard on Any Device
Modern dark-themed web interface that works on phones, tablets, and laptops — no app to install. Live transcript, live summary, meeting history, and AI chat, all behind one mobile-friendly URL.

### 💾 Your Data, Your Card
Every meeting saved locally to a microSD card — full WAV audio, transcripts, and summaries — yours to keep. Download from the dashboard or pop the card into any computer; no cloud storage subscription required.

### 🔋 Battery Friendly
Bluetooth fully disabled, WiFi modem sleep enabled, dynamic CPU clock (80 MHz idle / 240 MHz active), and a slow heartbeat LED blink during recording — adds up to ~50 mA of continuous savings. A 1000 mAh LiPo runs the device for days of idle time and several full meetings per charge.

### ⚠️ Factory Reset
Two-step confirmation in Settings wipes every meeting, every credential, and reboots into setup mode. Great for handing the device to a friend or starting fresh.

---

## 🧰 Hardware

| Component | Notes |
|---|---|
| **Seeed XIAO ESP32-S3 Sense** | Built-in PDM microphone on the Sense expansion board |
| **microSD card (FAT32)** | Any size; meetings auto-archive here |
| **Push-button** | Wired between D1 (GPIO 1) and GND for one-touch record |
| **USB-C power** | Or a Li-Po battery on BAT+/BAT- pads for portable use |

Pin assignments live in [`src/core/globals.h`](src/core/globals.h).

---

## 🚀 Quick start

1. **Install** Arduino IDE 2.x and the [ESP32 board package](https://docs.espressif.com/projects/arduino-esp32/en/latest/installing.html) (board: **XIAO_ESP32S3**).
2. **Clone** this repo and open `MeetingRecorder.ino` in the IDE.
3. **Upload.** No Library Manager step — the JSON parser is bundled as `Shubh'Json` inside the sketch.
4. **First boot:** the device creates a WiFi hotspot called `MeetingRecorder` (password `recorder123`). Connect from your phone, open <http://192.168.4.1/setup>, and enter:
   - Your home WiFi SSID + password
   - An **ElevenLabs** API key (for speech-to-text)
   - An **OpenAI** API key (for summaries)
5. **After save:** the device switches to your home WiFi and the AP shuts down. Open **<http://meetingrecorder.local>** from any device on the same network.
6. **Press the button or hit Start in the dashboard.** That's it.

Full setup, troubleshooting, and architecture notes in [`docs/README.md`](docs/README.md).

---

## 📚 Project documentation

- **[docs/README.md](docs/README.md)** — full setup, build & flash, features, web API, troubleshooting
- **[docs/ARCHITECTURE.md](docs/ARCHITECTURE.md)** — runtime architecture, FreeRTOS task layout, map-reduce summarisation flow, SD storage map
- **[docs/FILES.md](docs/FILES.md)** — file-by-file source reference
- **[docs/MeetingRecorder_Features.pdf](docs/MeetingRecorder_Features.pdf)** — printable feature sheet

---

## 🧪 Bundled libraries

This sketch is **zero-install** — no Library Manager step required.

- **Shubh'Json** (in [`ShubhJson/`](ShubhJson/) + [`src/json/`](src/json/)) — bundled JSON parser, branded for this project. Derived from the MIT-licensed ArduinoJson by Benoit BLANCHON; original LICENSE preserved in [`docs/ShubhJson_LICENSE.txt`](docs/ShubhJson_LICENSE.txt) as required.

---

## 📐 Footprint

| | Used | Available |
|---|---|---|
| **Flash** | ~1.30 MB | 3.34 MB (39%) |
| **RAM** | ~42 KB | 320 KB (12%) |

Plenty of headroom for OTA updates, speaker diarisation, multi-language transcripts, and more.

---

## 🤝 Credits

- Project, hardware integration, and Shubh'Json bundling by **[Shubh Jaiswal](https://github.com/Shubhjaiswal408)**
- YouTube showcase and tutorials on **[techiesms](https://www.youtube.com/@techiesms)**
- JSON parser internals: [ArduinoJson](https://arduinojson.org) by Benoit BLANCHON (MIT)
- Speech-to-text: [ElevenLabs Scribe](https://elevenlabs.io)
- Summarisation & chat: [OpenAI GPT-4o-mini](https://platform.openai.com)

MeetingRecorder

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MeetingRecorder

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