https://github.com/milovanpms/talk-e

A simple LoRa-based talkie-walkie built with ESP32, operating on the 433 MHz frequency band for long-range, low-power wireless communication.
https://github.com/milovanpms/talk-e

433 433mhz c embedded embedded-c embedded-systems esp32 lora sx1278 sx127x

Last synced: 3 days ago
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A simple LoRa-based talkie-walkie built with ESP32, operating on the 433 MHz frequency band for long-range, low-power wireless communication.

• Host: GitHub
• URL: https://github.com/milovanpms/talk-e
• Owner: milovanpms
• Created: 2026-05-04T06:39:49.000Z (about 2 months ago)
• Default Branch: main
• Last Pushed: 2026-06-16T16:48:37.000Z (5 days ago)
• Last Synced: 2026-06-16T18:24:57.932Z (5 days ago)
• Topics: 433, 433mhz, c, embedded, embedded-c, embedded-systems, esp32, lora, sx1278, sx127x
• Language: C
• Homepage:
• Size: 72.5 MB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

          








Talk-E is a walkie-talkie powered by LoRa and an ESP32-S3, operating on the 433 MHz band. And it mostly works.




  

  

  

  

  

  



milovan.me


## In a nutshell

- **What** : Two identical devices, one button to talk, and that's it.

- **Why** : We didn't have much time, so we wanted something original, interactive, and fun to demo. The kind of project you understand immediately just by holding it in your hands.

- **Context** : Radiocommunication student project, two-person team.

## Documentation

The documentation is quite detailed, so each part has its own page instead of having it all here.

### Find your happiness:

- ⚙️ [Hardware Architecture](./docs/architecture.md): Functional synoptic diagram and component details

- 🛠️ [Firmware](./docs/firmware.md): ESP-IDF, libraries, code architecture

- 📡 [Radio Parameters](./docs/radio.md): How we use LoRa

- 🎙️ [Audio Processing](./docs/audio.md): A voice's journey through the system

- 👤 [Human-Machine Interface](./docs/hmi.md): How does it works for the user

- 🔋 [Power Supply Circuit](./docs/power.md): Power management and energy consumption

- 🔌 [Electronics](./docs/pcb.md): Prototyping, KiCad, RF design, routing rules, our conception choices

- 📐 [CAO](./docs/cao.md): Our vision of an enclosure for this device

## Repository Structure 

```

├── hardware/        # KiCad schematics, PCB

├── firmware/        # ESP-IDF code

├── docs/            # Documentation, conception notes

├── media/           # Images, schematics and illustrations

└── case/            # 3D models

```