🔘 One Button, Infinite Possibilities — Meet the One Key Bluetooth Keyboard
Got a presentation coming up? Hate fumbling with your phone or keyboard mid-talk? This tiny build might be your new favorite gadget.
Adafruit's One Key is a minimalist Bluetooth Keyboard built with just ONE button — powered by an ESP32 board running CircuitPython.
📋 What you need
- Adafruit Matrix Portal S3 or QT Py ESP32
- CircuitPython (runs right out of the box)
- One tactile button + a LiPo battery
🔧 How it works
- Wire a single button to your board
- Flash the CircuitPython BLE HID code
- Press the button → sends your configured keystroke over Bluetooth!
✨ Perfect for
- ** Presentations** — advance slides hands-free
- Accessibility — one-tap control for mobility-impaired users
- Mobile workflow — trigger actions from across the room
💡 Pro tip
Design a custom 3D-printed case and turn it into a sleek desk accessory!
🔗 Full guide + code: Adafruit Learning System
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