STM32 MCU Getting Started Guide

Set up with your favorite AI

Gemini & other AI

Copy the setup prompt into your AI. Work through each step together, from checking your kit to getting it running.

Copy the prompt, then paste it into Gemini’s message box.

View prompt

Guide Leafony setup in English, one step at a time. First check the goal (factory demo or programming), kit, photo or installed leaf models, assembly and all power sources. Then ask only for needed reprogramming history, OS and tools. Clarify which LED/display changed or which cable/leaf was replaced; an unseen reset button is not necessarily absent. Give one action with its expected result and wait. Basic Kit 2 ships with AVR: use the Basic Kit guide for its unchanged demo. Before flashing, explain overwriting and confirm intent. Power off all sources before changing the stack; check USB-leaf reset support and port users. Verify specifications with current official URLs, separating observations from hypotheses. Follow redirects; if unreadable, ask for text or errors rather than guessing.

Page: STM32 MCU Getting Started Guide

URL: https://docs.leafony.com/en/getting-started/stm32/

Getting started: https://docs.leafony.com/en/getting-started/

Basic Kit demo: https://docs.leafony.com/en/getting-started/basic/

Environment setup: https://docs.leafony.com/en/environment/

Description / headings (excerpt): Choose a development tool for STM32 MCU, review the preparation overview, and find setup guides and your first examples. / What to prepare / How to write a program / What to try next / If you need help

Start developing with the STM32 MCU leaf (AP03). Choose a tool below to find its setup guide.

AP03 STM32L452RE

STM32 MCU

The STM32 processor leaf included in Basic Kit 2. Debugger connection instructions are also available.

Development tools

How to connect the debugger

What to prepare

This is a summary of the preparation shared by the guides for uploading through a USB leaf. Check your chosen environment guide and sample page for the detailed configuration and assembly diagram.

AP03 STM32 MCU
A PC running Windows, macOS, or Linux, with an internet connection
A USB leaf and a data cable that fits its connector
Sensors, power leaves, and mounting parts specified by your chosen sample

If you have Basic Kit 2, check which processor is fitted. Stop all power supplies, including USB, batteries, and external power, before changing leaves.

For the equipment needed to use a debugger, see How to connect the debugger.

How to write a program

The Arduino IDE and PlatformIO guides linked above describe board configuration, uploading, and checking the result. For STM32CubeIDE, the English guide covers installation; project creation and upload instructions are available in the Japanese STM32CubeIDE guide.

Start with the check program in the guide for your tool. Once the development environment is working, move on to sensor and communication examples.

What to try next

The following examples are written for Arduino IDE. Each sample page lists its required leaves, libraries, code, and expected result.

Temperature and humidity sensor: display temperature and humidity on your PC
Illuminance sensor: measure ambient light
Accelerometer: observe changes as the leaf tilts or moves
STM32 Logger Beacon: try data logging and BLE transmission

For existing projects in PlatformIO, also follow the sample project instructions in the PlatformIO guide.

If you need help

Start with your development environment guide and the FAQ. The AP03 technical reference shows switch locations and pin assignments.

If the issue continues, contact us with your leaf model numbers, development tools, steps tried, and the complete error message.