Traffic light that does things BambuLab integrated

Smart traffic light that does things — Bambu Lab integrated

An RGB desk indicator that shows your printer status at a glance.
No notifications. No apps. No screen to unlock.

Just look at it.

🎮 Interactive Demo (try it before printing)

You can test the traffic light directly in your browser.
Simulate printer states, RGB effects, weather and automations — no hardware required.

👉 https://gabemx5.github.io/ESP32-C3-Semaphore/demo/

🐼 Bambu Lab Integration

Connects to your printer over your local network and updates automatically in real time:

🟢 Printing
🟡 Paused / heating / waiting
🔴 Error or attention needed
⚪ Idle or offline

Compatible with X1, X1C, P1S, P1P, A1, A1 Mini.
Fully local — no cloud, no account.

✨ What it actually does

Not just a printer indicator.

• RGB effects: rainbow, party, cycle, Morse code
• Weather & air quality colors (Open-Meteo)
• Weekly timers with custom actions
• Home Assistant & MQTT (auto-discovery)
• Alexa voice control (local only)
• OTA updates with rollback

A small object that quietly tells you everything.

🖨️ Printing

Two plates, two materials.

• Body & rings → Black PLA (fuzzy skin for matte finish)
• Lenses → Translucent PETG (for smooth light diffusion)

Settings:

• 0.4 mm nozzle
• 0.2 mm layers
• 15% infill
• No supports

🔧 Assembly

Five minutes. No tools.

• Insert WS2812B LEDs into the rings
• Place lenses in front
• Insert the ESP32-C3 in the back
• Close with a drop of CA glue

Done.

⚡ Hardware

• Seeed XIAO ESP32-C3 (with OLED)
• 3× WS2812B LEDs
• USB 5V

📲 Firmware (no drivers, no hassle)

Flash directly from your browser:

👉 https://gabemx5.github.io/ESP32-C3-Semaphore

WiFi setup runs immediately after flashing.

📁 Source & Documentation

• Wiki: https://github.com/GabeMx5/ESP32-C3-Semaphore/wiki
• Source: https://github.com/GabeMx5/ESP32-C3-Semaphore

💡 Why this works well

Because you don’t need to check anything.
It tells you.

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You can find more designs here: https://makerworld.com/it/@mary83