Leaf catalog

AVR MCU

Run programs to read sensors and control other leaves. Uses an ATmega328P with digital I/O, PWM outputs, and analog inputs.

STM32 MCU: Arduino-Compatible Microcontroller Leaf

Read sensors and control other leaves with a 32-bit STM32 microcontroller. Use a USB leaf for USB connections or a Shield leaf for SWD connections.

STM32 MCU

Read sensors and control other leaves. A redesigned version of AP03, equipped with an STM32L452REI6.

Design reference available; AP03B upload instructions in preparation

STM32N6

An MCU leaf intended for evaluating image processing and edge AI. Uses an STMicroelectronics STM32N6-series microcontroller.

ESP32 MCU

Run programs and send or receive data over Wi-Fi or Bluetooth LE. Uses an ESP32-WROOM-32 with Japanese radio certification, and supports uploading sketches over USB.

BLE Sugar

Combine with an MCU leaf to send and receive sensor data and other information over Bluetooth LE. Uses a Silicon Labs BGM11S22F256GA-V2 module with Japanese radio certification.

LoRa Mary

Combine with an MCU leaf to exchange data with compatible devices over LoRa radio. Uses a Murata Type ABZ module and a STAF chip antenna covered by Japanese radio design certification.

LTE-M Mary

Combine with an MCU leaf to send and receive data using Cat-M1, an IoT cellular communication technology that runs on mobile operators' LTE networks. Requires an AV06 power leaf, a compatible SIM, and a mobile service contract. Uses a Murata Type 1SC module and a certified chip antenna.

Cat-M1 TY

A leaf for data communication over Cellular LPWA Cat-M1 networks. Includes a Taiyo Yuden WSCLxADAH2Z-series module, a nanoSIM slot, and a U.FL connector for an external antenna.

LoRa Easy

Send and receive data over LoRa radio. This leaf is discontinued. Its successor is AC07 LoRa Mary , which changes the MCU interface from UART to SPI.

LTE-M King M

Send and receive data using cellular communication. Requires AC05, a compatible SIM, and a mobile service contract. This leaf is discontinued. The successor cellular configuration uses AC08 LTE-M Mary and the AV06 power leaf.

LTE-M King S

Combine with LTE-M King M to supply power, upload programs to the MCU, and read battery voltage. This leaf is discontinued. For a new cellular configuration, see AC08 LTE-M Mary and the AV06 power leaf.

Wi-Fi Mary

Combine with an STM32 MCU to send and receive data over Wi-Fi. AVR MCU is not supported. This leaf is discontinued.

4-Sensors: Temperature, Humidity, Light and Acceleration

Measure temperature, humidity, and light, and use acceleration to detect tilt or movement. Combine with an MCU leaf to monitor the surrounding environment or the movement of an attached object.

Env Sensors

Measure temperature, humidity, pressure, and 3-axis acceleration. The standard configuration uses a BME280 and LIS2DW12, read over I2C by an MCU leaf.

Specifications and connections available; sensor example in preparation

Motor

SP&PIR

Detect an approaching person and play sound through a speaker. An MCU can control actions such as playing a melody when someone approaches.

MIC&VR&LED

Read ambient sound or a potentiometer setting, and light an LED. An MCU can use these readings to produce an indication based on sound level.

LCD

Display text or numbers on an 8-character × 2-line LCD and accept input from two switches. The reference page includes power setup, libraries, and a text-display quickstart.

CR2032

Supply 3.3V to the leaves from a CR2032 coin cell. An MCU can read battery voltage, and a power switch turns the supply on or off.

Solar Charger — Documentation in Preparation

A power leaf for supplying power and charging using a solar panel.

Specifications and connection instructions in preparation

1.8V–5.5V

Supply 3.3V at up to 1A from a 1.8V–5.5V battery connected through a PH connector. An MCU can read the battery voltage.

CR2450

Supply 3.3V to the leaves from a CR2450 coin cell and read battery voltage through an MCU. Includes a power switch.

AA BAT

Supply 3.3V to the leaves from AA batteries and read battery voltage through an MCU. Includes a battery holder and power switch.

A 2V～4.5V

Supply 3.3V to the leaves from a battery connected through an SH connector. An MCU can also read the battery voltage.

Shield

Connect Arduino Shields to add functions, or attach SWD/ICSP tools. Includes Arduino Shield connectors and three leaf interfaces.

29 pin

Connect leaf signals to external circuits for prototyping and signal checks. Breaks out all 29 leaf interface pins to 2.54mm-pitch through holes.

29-pin

Connect external circuits for prototyping and signal checks. Breaks out the 29 Leafony Bus pins to 2.54mm-pitch through-hole pads.

Spacer

Increase the spacing between stacked leaves to prevent components from touching.

I Meas Current Measurement Leaf

Connect an external current meter to measure current on the Leafony Bus V33 and VBUS lines. Inserts the instrument in series with the power line.

Terminal

Leaf x2

A connector leaf for arranging leaves side by side.

I Meas

Connect an external ammeter to measure current on the 3.3V and VBUS lines.

Grove&5V

Connect 5V Grove modules. Supports UART, I2C, analog input, and digital input.

Back to back

A connector leaf for connecting leaves back to back.

29pin header

Connect leaf signals to external circuits through pin headers. Breaks out all 29 leaf interface pins at a 2.54mm pitch.

USB

Connect this leaf to upload sketches to an AVR MCU or use the serial monitor. It uses an FTDI FT232RQ USB-to-UART converter. A step-down circuit converts USB VBUS (5V) to 3.3V, supplying both VBUS and 3.3V to the leaves. The successor is AZ01C USB-C . Uploading to AP01 through AZ01C requires a manual reset.

USB-C

Connect to a computer through USB Type-C for serial communication and 3.3V power to the leaves. Uploading a program to AP01 requires a manual reset.

Connector

Electrically connect stacked leaves. Place ACR (anisotropic conductive rubber) between the leaves and compress it with screws to make contact.

Connector Cover

The Connector Cover protects the ACR (anisotropic conductive rubber) from dirt.

Nut Plate

The Nut Plate secures leaves with screws. Do not use ordinary hex nuts, as they may touch board contacts and cause a short circuit.

Basic kit case

Houses Basic Kit and attaches to a magnetic surface using the magnet on its base.

RTC&microSD

Read the time and store data on a separately purchased microSD card. Combine with an MCU to record measurements with timestamps.

AAA battery holder

Connect AAA batteries to the AV04 power leaf. Includes a JST SH connector.

18650 battery holder

Connect an 18650 battery to the AV04 power leaf. Fits a battery measuring 18mm in diameter and 65mm in length, and includes a JST SH connector.