nuntino is a tiny thermal printer that brings your digital messages into the physical world.
Send a thought, a reminder, or a heartfelt note from anywhere - and watch it appear as a
printed keepsake in your loved one's home.
Send from anywhere
Compose messages from your phone or computer. No app required - just a web browser.
Prints automatically
Messages print instantly on thermal paper. No ink, no fuss - just simple, reliable delivery.
Screen-free receiving
Perfect for grandparents, kids, or anyone who wants connection without screens.
nuntino
A tiny thermal printer for family messages
nuntino combines a compact ESP32-C3 microcontroller with a thermal printer to create a physical message receiver. Messages sent through the web interface are delivered instantly to your loved ones as printed notes.
Dimensions
Compact desktop form factor
Paper
58mm thermal paper roll
Connectivity
WiFi 802.11 b/g/n
Power
USB-C, 5V 2A
How it works
The system is elegantly simple: a SvelteKit web app handles message creation and storage, while the ESP32 device polls the server every 30 seconds looking for new messages to print.
Compose - Write a message on nuntino.de from any device
Schedule - Set when the message should be delivered
Deliver - The printer automatically fetches and prints your message
Confirm - Publication is confirmed back to prevent duplicates
Web Stack
SvelteKit, SQLite, better-auth
Firmware
PlatformIO, Arduino framework
Protocol
HTTPS REST API, JSON payloads
Electronics
A custom two-layer PCB brings everything together: the ESP32-C3 microcontroller, USB-PD power negotiation, voltage regulation, and the thermal printer interface. The design uses through-hole components where practical for easier assembly.
Core Components
Microcontroller
ESP32-C3 Super Mini (RISC-V @ 160MHz, 400KB SRAM, 4MB Flash)
