AP03 STM32 MCU: Arduino-Compatible Microcontroller Leaf

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Read this official Leafony page and explain its key points in English. For hardware help, first ask for a photo or the installed leaf models, assembly and power sources, then the goal and tools. Clarify which LED or display changed and whether a cable or leaf was replaced. Do not equate an unseen reset button with an absent one, or I2C acknowledgement with a working display. Verify specifications against sources; distinguish observations from hypotheses. Follow a redirect to its destination; if unreadable, ask for the relevant text instead of guessing.

Page: AP03 STM32 MCU: Arduino-Compatible Microcontroller Leaf

URL: https://docs.leafony.com/en/leaf/processor/ap03/

Description / headings (excerpt): Find Leafony AP03 STM32L452REI6 specifications, pin assignments, schematics and Arduino board settings, with sensor-reading and BLE beacon examples. / Features / Specification / Block diagram / Pinassign

Features

Run programs that read connected sensors and control other leaves based on their readings. Development with Arduino IDE is supported.

This 32-bit MCU (microcontroller) leaf uses STMicroelectronics’ STM32L452RE series with an Arm Cortex-M4 core and FPU. Use a USB leaf for a USB connection or a Shield leaf for SWD.

Specification

Item	Description
Part number	STM32L452REI6
Core	ARM Cortex-M4
Operating voltage	3.3V
Input voltage	3.0-3.6V
Digital I/O	16
Analog input	6
ADC	12bit
Flash Memory	512 KB
SRAM	160 KB
Clock frequency	80MHz
Others	RTC with HW calendar, alarms and calibration
Arduino IDE Board Settings	Board: “Leafony STM32”
	Board Part number: “Leafony STM32 MCU(16MHz)“
	Board Part number: “Leafony STM32 MCU(80MHz)“
Dimension	W23×D20.5×H4.7mm

Block diagram

Pinassign

See the pin assignment data for details.

Tips

About LEDs and switches

Item	Description
LED	Lights up when in write mode.
Reset switch	Resets the STM32 and other devices.
Program switch	Switch to change to Program mode.

Sample App

How to use it with Arduino

In order to use this leaf with Arduino, you need to configure the board on Arduino IDE.
Please refer to Environment for setting instructions.

Document

Revision history

First edition, November 2020