Sample apps

Blink an LED with STM32CubeIDE

Use an STM32CubeIDE project to turn the AP03 STM32 MCU LED on and off every second. Covers downloading, importing, building, programming, and checking the result.

Read battery

Read the battery voltage using the AD converter on the CR2032 coin cell leaf.

Button

Displays the status of the boot mode switch on the ESP32 MCU leaf on the serial monitor.

Temperature and humidity sensor

This sample reads the value of the temperature and humidity sensor on the 4-Sensors Leaf and displays it on a serial monitor.

Temperature and humidity sensor

This sample reads the value of the temperature and humidity sensor on the 4-Sensors Leaf and displays it on a serial monitor.

Read HTS221 Temperature and Humidity with ESP32

Use Leafony AP02 ESP32 MCU and AI01 4-Sensors to read HTS221 data in Arduino's serial monitor. Covers assembly, sample code and two-point correction.

Illum sensor

This sample reads the value of the illuminance sensor on the 4-Sensors leaf and displays it on the serial monitor.

Illum sensor

This sample reads the value of the illuminance sensor on the 4-Sensors leaf and displays it on the serial monitor.

Illum sensor

This sample reads the value of the illuminance sensor mounted on the 4-Sensors leaf and displays it on the serial monitor.

Accelerometer

Read acceleration with AP03 STM32 MCU and AI01 4-Sensors using Arduino IDE. Includes required libraries, the I2C address, 115200 bps output, and checks.

Accelerometer

This sample reads the value of the accelerometer on the 4-Sensors Leaf and displays it on a serial monitor.

Accelerometer

This sample reads the value of the accelerometer mounted on the 4-Sensors leaf and displays it on the serial monitor.

Read battery

Read the battery voltage using the AD converter on the CR2032 coin cell leaf.

IR sensor

Using an infrared sensor IC (AKM AK9754AE) for close-range detection on the SP&PIR Leaf, let's create a system that makes a sound when a person approa

IR sensor

Using an infrared sensor IC (AKM AK9754AE) for close-range detection on the SP&PIR Leaf, let's create a system that makes a sound when a person approa

IR sensor

Using an infrared sensor IC (AKM AK9754AE) for close-range detection on the SP&PIR Leaf, let's create a system that makes a sound when a person approa

Sound level meter

Let's assemble leaves as shown in the figure below.

Sound level meter

As you rotate the volume, the number of LEDs light up in proportion to the amount of rotation. You can also turn on the number of LEDs according to th

Sound level meter

As you rotate the volume, the number of LEDs light up in proportion to the amount of rotation. You can also turn on the number of LEDs according to th

Distance sensor

An example of using Seeed Studio's Grove series of sensors. The distance measured by the ultrasonic sensor is displayed on the LCD. Ultrasonic sensors

Requires a Grove ultrasonic distance sensor

Real time clock

In order to make this sketch work, you need to install the libraries If you haven't installed it yet, refer to Environment to install it.

Speaker

Use the piezoelectric loudspeaker in the SP&PIR Leaf to make the melody sound.

自動測定監視システム(抵抗と温度を測定してGoogle Sheetsに保存)

このサンプルはGoogle SheetsをつかったIoTサービス入門で紹介したものと抵抗測定を組み合わせたものです。 Leafony で恒温槽内複数の被測定基板の抵抗と温度を測定してBeaconで送信しRaspberry Piを使ってGoogle スプレッドシートに測定データを保存します。

Requires a Raspberry Pi and a prototyping board

micro SD

c++ / Connect the SD card to the following pins: SD Card ESP32 D2 - D3 SS CMD MOSI VSS GND VDD 3.3V CLK SCK VSS GND D0 MISO D1 - / include "FS.h" incl

Requires a microSD card

LCD

Let's assemble leaves as shown in the figure below.

体重計

このサンプルはWeb Bluetoothを使ったIoTアプリ入門で紹介したものと歪センサーを組み合わせたものです。BLEを使って体重をスマートフォンやパソコンに表示することができます。

Requires strain sensors and an HX711 board

Web Bluetooth IoT with STM32

This sample is an STM32 implementation of the one introduced in the Basic Kit Web Bluetooth IoT. The Web Bluetooth application uses the same one as th

Speaker

Use the piezoelectric loudspeaker in the SP&PIR Leaf to make the melody sound.

STM32 Simple BLE Beacon

This is a simple BLE Beacon sample design using STM32 Leaf. Send the string "HELLO BEACON" for a period of time, then repeat the sleep cycle.

Blink

Turns on and off the LEDs on the AVR MCU leaf every second.

LCD

Let's assemble leaves as shown in the figure below.

Wi-Fi touch sensor

View ESP32 Wi-Fi Kit touch readings in a phone or PC browser. Connect to Leafony's Wi-Fi and explore 29pin header touch inputs and the detection threshold.

STM32 Logger Beacon

This is a sample design of a BLE Beacon that can record temperature, humidity and measurement time using the Flash memory in the STM32 leaf.

Speaker

Use the piezoelectric loudspeaker in the SP&PIR Leaf to make the melody sound.

Log and Visualize ESP32 Sensor Data in Google Sheets

Send readings from ESP32 Wi-Fi Kit 2 with 4-Sensors or DHT22 to Google Sheets. Set up Apps Script, Arduino or PlatformIO, and plot your data in Grafana.

Google Sheetsを使ったIoTサービス

Leafony blockは、センシングデータをBeacon ^1 の電波で飛ばします。beaconの電波をRaspberry Piが受け、インターネット経由でGoogle スプレッドシートに書かせて、データの可視化ができます。

Requires a Raspberry Pi

LCD

The display has 8 characters per line and 2 lines . Hello, World! has 13 characters and does not fit on one line. This sample uses Hello! , which fits

4-sensors LCD

(/examples/advanced/avr-mcu/exten/4-sensors_lcd/lcd_overview2.png)

PIR melody test

Using the infrared sensor IC for short range detection (AKM AK9754AE) installed in the SP&PIR leaf, let's create a system that plays a melody when a p

低電力にポスト投函検出してLINE通知（過去版）

ESP32の省電力動作と加速度センサを使ったポスト投函検出の過去の実装例。LINE Notifyは2025年3月31日に終了しており、掲載の通知手順は現在利用できません。

STM32 LoRa クイックスタート

(/examples/advanced/stm32-mcu/stm32/stm32_lora_tx_sensors/ap07_fig2.jpg)

Requires a transmitter and receiver; add an LCD to display RSSI

Watering plants with a motor

This sample app is a combination of the one introduced in the Basic Kit Web Bluetooth IoT and Motorleaf. Using Bluetooth, you can control the electric

Requires an electric pump

STM32 LoRa 署名付き通信

このチュートリアルではAC07 LoRa Maryリーフに搭載されるATECC608Aを使用して、LoRaの通信に署名をつける方法を紹介します。 通信に署名をつけることで、データの送り元が、受信者が意図したデバイスであるかどうかを判定することができ、通信の安全性が向上します。

Requires both a transmitter and a receiver

Web Bluetooth IoT

This sample is the same as the one introduced in Basic Kit Getting Started Guide. Let's read the source code to understand how it works.

STM32 セルラー通信クイックスタート

^1 : このサンプルのセルラー通信は、携帯電話のLTE網を使うIoT向けのCat-M1方式です。

Requires an IoT SIM, power leaf, and other parts listed in the article

Google Sheets IoT

We will create an IoT environment sensor using Leafony Beacon1) and Raspberry Pi, and visualize the sensor data using Google Spreadsheet.

Requires a Raspberry Pi

STM32で人物検出する推論ネットワークの実装

- Emmbedded Software Packages Manager というウィンドウが開かれます。 - STMicroelectronics というタブを選択します。 - X-CUBE-AI をクリックすると様々なバージョンの Artificial Intelligence が表示されますの

Requires a camera, display, and other parts listed in the article

LoRa

Using LoRa Easy leaf, sensor data (temperature, humidity, illumination, tilt) can be sent to a distant location and output to a PC terminal.

Requires both a transmitter and a receiver

Camera

An example of using Seeed Studio's Grove series sensors. Let's try to save an image taken by the camera once a minute to a microSD card.

Requires a camera, RTC & microSD leaf, and microSD card

【過去版】ESP32とGoogle Sheetsでセンサデータを記録する

ESP32 MCUと4-Sensorsを使う旧サンプルのGoogle Sheets設定手順。旧Apps Script画面向けの資料として残し、現在のESP32 Wi-Fi Kit 2向け手順へ案内します。

【過去版】Google Sheets連携のESP32組み立て・設定

ESP32 MCUと4-Sensorsを使う旧Google Sheets連携サンプルの組み立てとスケッチ設定。使用リーフ、Wi-Fi接続、送信間隔の設定と現行手順へのリンクを掲載しています。