Sensors and I/O
A portable ESP32-based walkie-talkie that uses an embedded neural network for voice activity detection and keyword spotting, enabling push-to-talk-free operation.
Official path: https://oshwhub.com/corebb/bbtalkie
BBTalkie is a compact ESP32-based walkie-talkie designed for hands-free use.
An embedded neural network performs voice activity detection (VAD) and keyword spotting (KWS); transmission is triggered automatically when speech or a wake word is detected.
The hardware is open source: PCB, firmware, CAD drawings, and development tools are all provided in the repository.
MCU: ESP32 family (exact variant per schematic).
Audio: onboard microphone input and speaker driver for voice capture and playback.
RF: uses ESP32 Wi-Fi or Bluetooth for wireless voice streaming (protocol and band per firmware).
Power: Li-ion battery with charging management (voltage and charger IC per schematic).
Interfaces: programming/debug header (UART or USB) for flashing and debugging.
Firmware is built on ESP-IDF or Arduino, handling audio capture, neural network inference, and wireless transmission.
The neural network model performs VAD and KWS; it is quantized for deployment on ESP32.
The open-source repository includes full code, PCB design files, CAD drawings, and auxiliary tools and references used during development.
Voice activity detection (VAD)
Keyword spotting (KWS)
Hands-free operation
ESP32 audio processing
中文
传感器与外设
一款基于 ESP32 的便携对讲机，内置嵌入式神经网络，自动检测人声并识别关键词，无需按键即可通话。
官方路径: https://oshwhub.com/corebb/bbtalkie
本项目为 BBTalkie，一款基于 ESP32 的迷你对讲机，主打免按键操作。
通过嵌入式神经网络实现语音活动检测（VAD）和关键词识别（KWS），检测到人声或特定关键词时自动触发发射。
硬件开源，包含 PCB、代码、CAD 图纸及开发工具和参考资料。
主控：ESP32 系列（具体型号见原理图）。
音频：板载麦克风输入和扬声器驱动，用于语音采集和播放。
射频：使用 ESP32 的 Wi-Fi 或蓝牙进行无线语音传输（具体频段和协议见固件）。
供电：锂电池供电，带充电管理（具体电压和充电 IC 见原理图）。
接口：预留编程/调试接口（如 UART 或 USB），用于固件烧录和调试。
固件基于 ESP-IDF 或 Arduino 框架开发，实现音频采集、神经网络推理和无线传输。
神经网络模型用于语音活动检测和关键词识别，模型量化后部署在 ESP32 上。
开源仓库包含完整代码、PCB 设计文件、CAD 图纸以及开发过程中使用的工具和参考资料。
语音活动检测（VAD）
关键词识别（KWS）
免按键通话
ESP32 音频处理