A voice-activated sticker printer. Press and hold the button, describe what you want, and it generates a black and white coloring page sticker that prints to a thermal printer.

1. Hold the button and speak (max 15 seconds)
2. Whisper transcribes your voice
3. Google Imagen generates a coloring page based on your description
4. Image displays in browser and prints to USB thermal printer

1. Install dependencies:

pnpm install

2. Create .env file:

GEMINI_API_KEY=your_api_key_here 

3. Connect a USB thermal printer. Currently only supports USB printer in MacOS - I would like to get this running with bluetooth or a receipt printer instead.

Start the backend server:

pnpm server

Start the frontend (in another terminal):

pnpm dev

Open http://localhost:5173.

To use your phone, you'll need to visit the page on your local network. Since it uses microphone access, this needs to be a secure origin. I use Cloudflare tunnels for this.

TLDR: The Phomemo PM2 will work great over bluetooth or USB.

While any printer will work, I'm using a 4x6 thermal printer with 4x6 shipping labels. These printers are fast, cheap and don't require ink.

Theoretically a bluetooth printer will work as well, but I have not tested. I'd love to get this working with these cheap Niimbot / Bluetooth "Cat printer", though those labels are plastic and not colour-able.

The image prints right away, which is magical. Sometimes you can goof up. In this case, simply say "CANCEL", "ABORT" or "START OVER" as part of your recording.

It would be great if this was more portable. That app has 2 pieces: Client and Server. The TTS happens on the client. The Gemini API calls and printing happens on the server.

The server does not do anything computationally expensive - just API calls -, so it could theoretically be run on Raspberry PI or an ESP32, which may require re-writing in C++. The server also sends the data to the printer - so there would need to be drivers or use a lower level protocol use ESC/POS.

It could not be run 100% on an iphone browser as WebSerial / Web USB isn't supported on Safari. Perhaps it could as a react native app?