Imported from GitHub: kiisu-io/kiisu-smol · commit ebf8586 · license CERN-OHL-S-2.0

Description

Hardware design files, schematics, and 3D models for KIISU SMOL — modular networking development board

README

KIISU SMOL

Modular & Small like never before!

Hardware design files, schematics, and 3D models for KIISU SMOL — a modular networking development board built around the STM32WB55 with Flipper Zero firmware compatibility and pluggable expansion modules for Wi-Fi, GPS, LoRa (Meshtastic), NFC and RFID.

🚀 Now on Indiegogo

KIISU SMOL is currently crowdfunding. Back the campaign and get yours:

👉 Support on Indiegogo

Highlights

• Main MCU: STM32WB55RGV / STM32WB55VGY (Cortex-M4, 64 MHz, 1 MB flash, 256 KB RAM)
• Sub-GHz: CC1101 (300–348 / 387–464 / 779–928 MHz)
• NFC: ST25R3916 (13.56 MHz, ISO14443 / ISO15693)
• RFID: 125–132 kHz
• Bluetooth: built-in with antenna
• IR: receiver and transmitter
• Display: 128×64 OLED (SSD1306-compatible)
• GPIO: 2×12-pin, 2.54 mm pitch, Flipper Zero pin-compatible
• Storage: soldered 512 MB SD
• Power: USB-C, LiPo connector, on-board 5 V → 3.3 V LDOs

Expansion modules

• Dual-Band Wi-Fi / GPS / SD (ESP32-C5)
• LoRa (Meshtastic-compatible, SMA connector)
• NFC / RFID + LIR2032 add-on

Repository contents

File / Folder	Description
kiisu smol v1a schematics.pdf	KIISU SMOL V1a schematics
kiisu smol v1a model.step / .glb	3D model of the main board
kiisu smol kicad extension board/	Sample KiCad project (CR2032 expansion board) and 3D packages

Firmware

• Main firmware (Flipper Zero–compatible): kiisu-smol-firmware

Where to buy

• Direct (EU): https://store.rainwalker.ee/
• Indiegogo (worldwide): https://www.indiegogo.com/projects/rainwalker/kiisu-smol---networking-development-board

Community

• 💬 Discord — https://discord.gg/kiisu
• 📰 Reddit — https://www.reddit.com/r/KIISU_IO/
• ✈️ Telegram — https://t.me/kiisu_io
• 📸 Instagram — https://instagram.com/kiisu.io
• 📘 Facebook — https://facebook.com/profile.php?id=61576595588296

License

Hardware design files (schematics, PCB project, 3D models) are released under the CERN Open Hardware Licence Version 2 — Strongly Reciprocal (CERN-OHL-S v2).

Documentation, manuals and this README are released under the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0).

Note: the previous internal name of this board was Kiisu Mini. Some artifacts in the KiCad sample project (km-2032, kiisumini.step, etc.) still carry the legacy km / kiisumini prefix to preserve internal references.

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Made with ♥ by RainWalker OÜ · Tallinn, Estonia