ESP32 MCU: Arduino IDE Setup

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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: ESP32 MCU: Arduino IDE Setup

URL: https://docs.leafony.com/en/environment/esp32/arduino/

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): Set up Arduino IDE for the AP02 ESP32 MCU leaf and upload a program. / What to prepare / Installing Arduino IDE / Previous IDE releases / Connecting to PC

Use Arduino IDE to set up the development environment for the AP02 ESP32 MCU leaf (ESP32-WROOM-32).

What to prepare

ESP32 Wi-Fi Kit
Data-capable USB cable
PC (Windows, macOS or Linux)

Installing Arduino IDE

Open the Arduino website and go to SOFTWARE.
Download the installer for your operating system.
Run the installer and follow its instructions.

Previous IDE releases

Older versions are available from Previous IDE Releases.

Connecting to PC

Connect to your PC with a USB cable.

Configuration of the microcontroller board

To use the ESP32 MCU leaf with the Arduino IDE, you need to install Arduino core for the ESP32.

Open the File → Preferences in the Arduino IDE and enter the following URL in the Additional Board Manager URL: field.

　　https://dl.espressif.com/dl/package_esp32_index.json

Select Tools -> Board -> Board Manager, search for esp32 by Espressif Systems and press the Install button. Use the version selector if you need to select a specific version.

Choose Tools → Board → ESP32 Dev Module.
Choose the connected serial port from Tools → Serial Port. If it is not listed, see Serial port not found.

Checking the operation of the microcontroller board

Let’s write a Sample App and get the ESP32 Wi-Fi Kit running.

Launch the Arduino.
Paste the following sample code into your code editor.

//*****************************
// ボタン入力の状態をシリアルモニタに表示するサンプル
//*****************************
int pushButton = 0;

void setup() {
  Serial.begin(115200);
  pinMode(pushButton, INPUT);
}

void loop() {
  int buttonState = digitalRead(pushButton);
  Serial.println(buttonState);
  delay(1);
}

Select the COM port to which the ESP32 leaf is connected.
Push the write to microcomputer board button to write a sketch.
Press and hold the Boot mode switch on the ESP32 leaf when the following message appears during the writing process.

Open the serial monitor and set the communication speed to 115200bps.
Press the Boot mode switch (IO0) and see if the input state of the switch changes.

Specifying pins for a sketch

Pin should be specified by Port, not Name.

Restrictions

※1：Output cannot be set
※2：①For UART1, the pin number is set to RX=26 and TX=25. For UART0 and UART2, the pin number is not specified.

HardwareSerial Serial1(1); // UART1 (RX=9, TX=10)

void setup() {
  Serial1.begin(9600, SERIAL_8N1, 26, 25); // ピンを変更 (RX=26, TX=25)
}

　　②Cannot be used as analog input if WiFi.h is included

※3: Pull-up prohibited because it is used for bootstrapping

Installing Libraries

To use some of the leaves, you will need to install additional libraries.
Here to install all libraries in advance.

When in doubt.

If it doesn’t work, go to “If it doesn’t work…” to find a solution.