A hardware Pomodoro timer for the M5Capsule. Physical buttons, LED feedback, and web sync.
- 🔘 Physical Controls — Real buttons for start/pause and mode switching
- 💡 LED Feedback — Color-coded LEDs show current mode (Work/Break)
- 🔊 Audio Alerts — Buzzer notifications when timer completes
- 🌐 Web Sync — Configure settings via USB from your browser
- 💾 Persistent Storage — Settings saved to flash memory
- 🔋 Battery Efficient — Light sleep mode for long battery life
- ⏰ RTC Support — Accurate timing even when device sleeps
- M5Capsule (ESP32-S3 based)
- USB-C cable
# Clone the repository
git clone https://github.com/QQSHI13/M5Timer.git
cd M5Timer
# Build and flash
pio run --target upload
# Monitor serial output
pio device monitor- Connect M5Timer to your computer via USB
- Open https://qqshi13.github.io/M5Timer
- Click "Connect" and select your device
- Adjust settings and sync
- Firmware: C++ (Arduino/ESP32 framework)
- Hardware: M5Capsule (ESP32-S3, BM8563 RTC, WS2812 LED)
- Web UI: HTML, JavaScript (Web Serial API)
- Build: PlatformIO
| Action | Button Press |
|---|---|
| Start/Pause | Single press |
| Switch Mode | Double press |
| Enter Sync | Hold 2 seconds |
| Color | Mode |
|---|---|
| 🔴 Red | Work (25 min) |
| 🟢 Green | Short Break (5 min) |
| 🔵 Blue | Long Break (15 min) |
I love the Pomodoro technique, but phone apps are too distracting. I wanted a dedicated device that:
- Has no notifications except the timer
- Works without my phone
- Feels satisfying to use
- Can be customized via web
- Web Serial API only works in Chrome/Edge
- Battery life depends on LED brightness settings
- Vibration motor support
- Multiple timer profiles
- WiFi sync for remote configuration
- E-ink display version
This project is licensed under the GPL-3.0 License.
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