01
Core
The common part that runsA compact MCU module with the minimum circuitry required for stable operation. Develop it on a Station, then install it in the device.
AN OPEN HARDWARE PROJECT
One development path,
from prototype to product.
CraftVia is an open embedded development platform combining product-oriented MCU Cores with a Station for development and measurement. Build quickly, verify with real measurements, move the same Core into your device, and graduate to an integrated MCU design when the time is right.
Overview
Bridging development boards
and custom PCBs.
- 01
Reduce the work of rebuilding a product-oriented MCU circuit for every project.
- 02
Bring programming, power control, logging, voltage, and current measurement into one reusable Station.
- 03
Carry circuits, firmware, and measured results from an early prototype into the next design.
System
Three clearly separated roles
02
Station
The place where you developA reusable environment for wiring, programming, power control, logging, voltage measurement, and current measurement.
03
Carrier
The place where the Core worksThe application-specific circuit connecting the Core to sensors, communications, drivers, power, and the outside world.
The Core model
Move development features
off the MCU board.
A typical MCU development board combines the MCU with a debugger, USB interface, power supplies, switches, LEDs, and other development features. CraftVia moves reusable development functions to the Station and keeps only the circuitry necessary for reliable MCU operation on the Core.
Typical MCU development board
CraftVia Core
On-board functions
MCU and development features combined
MCU and sufficient operating circuitry
Programming and debug
On each board or externally attached
Centralized on a common Station
Power and measurement
Different for every board
Shared and measurable on the Station
Moving into a device
Carry development features or redesign
Move the developed Core directly
MULTI-MCU PLATFORM
Different MCUs. One development environment.
The same separation principle and Core interface can be applied across multiple MCU families. Choose the Core that fits the application, then use a common Station and a consistent workflow for programming, power, and measurement.
CORE-SG031
CORE-SESP32-C3
CORE-SRP2040
STATION-SCommon StationPROGRAM · POWER · MEASURE
Development path
The goal is not to use a Core forever.
Delay the need for a custom PCB, then use the published design assets to move to a directly integrated MCU when scale or requirements demand it.
1Station + Core↓
2Prototype / perfboard↓
3Core + custom Carrier↓
4Integrated MCU design
Development status
Hardware currently in development
Core
Core-S G031
v1 Rev0 · Frozen design · UnverifiedBoards ordered
The first STM32G031-based Core-S implementation, providing the MCU and the circuitry required for its intended operating configuration.
GitHub ↗
Station
Station-S
v1 Rev0 · Frozen design · UnverifiedBoards ordered
A reusable Core-S development and measurement platform for programming, power control, UART logging, breakout access, and voltage/current measurement.
GitHub ↗
MakerCard
MakerCard-S
v1 Rev0 · Frozen design · UnverifiedBoards ordered
A reference implementation combining the Core-S G031 circuit with breakout, breadboard-style strips, power rails, and a universal prototyping field.
GitHub ↗Core
Core-S ESP32-C3
Specification in progress
A candidate next Core with wireless connectivity. Its application to the Core-S interface is under consideration.
GitHub ↗Core
Core-S RP2040
Specification in progress
A candidate next Core based on RP2040. Power, programming, and pin allocation are under consideration.
GitHub ↗Design principles
Open, measurable, reproducible.
Develop, measure, move, graduate
Develop and measure on the Station, move into the device, and graduate to direct MCU integration.
Measure from the beginning
Programming, logs, voltage, current, and test points are part of the design—not an afterthought.
Document the reasoning
Publish constraints, failures, measurement conditions, and decisions alongside design files.
Validate through real projects
Improve the platform using evidence from real prototypes, fixtures, and devices.
Project resources
Explore the project
Documentation
Standards, compatibility, design guidance, and Getting Started.
Hardware repositories
Editable sources, Gerbers, BOMs, CPLs, and schematics.
Contributing
Issue reporting, design review, and ways to participate.
This English version is the canonical source. The Japanese version is maintained as an official translation.