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As of 2025-09-22 How to Set Up Development Tools With Arduino IDE 1.x Instructions for setting up a development tools with Arduino IDE 1.x
This guide explains the procedure for setting up a development tools with Arduino IDE 1.x.
Although you can upload sketches using the latest Arduino IDE 2.x just like with Arduino IDE 1.x, as of May 2023, Java-based plugins such as
arduino-esp32fs-plugin and
EspExceptionDecoder do not work, so the Legacy IDE (1.x) is recommended.
1 - Installing Arduino IDE 1.x How to install the integrated development environment (IDE)
This guide explains the installation procedure for Arduino IDE 1.x.
If you have already installed Arduino IDE 1.x, you can ignore this article.
Download Open the Arduino official download page in your web browser and download the Legacy IDE (1.8.X) .
Software | Arduino
For example, the Windows installer is “Windows Win 7 and newer”.
Installation Run the downloaded file and follow the instructions to install Arduino IDE 1.x.
2 - Installing Arduino core for the ESP32 How to install the toolchain for ESP32
This guide explains how to install the compiler and libraries dedicated to the ESP32 for Arduino.
Launch Arduino IDE 1.x and open File -> Preferences from the toolbar.
Location of Preferences
Enter the following URL into the Additional Board Manager URLs field and click OK.
https://espressif.github.io/arduino-esp32/package_esp32_index.json Preferences Window
Installation Open Tools -> Board: “Arduino Uno” -> Board Manager from the toolbar.
The selected board may not be “Arduino Uno”, but please proceed with the same steps.
Location of Board Manager
Type “ESP32” in the search box and install the esp32 board definitions.
Board Manager
Operation has been confirmed with version 2.0.5 or later through 3.3.0 or earlier.
3 - Configuring Arduino core for the ESP32 How to configure the toolchain for ESP32
This guide explains how to configure the Arduino core for the ESP32 required for TWELITE SPOT firmware development.
From here on, the content is specific to TWELITE SPOT.
Selecting the Board Type From the toolbar, select Tools → Board → ESP32 Arduino → ESP32 Dev Module.
Location of ESP32 Dev Module
Board Settings Please configure as shown in the image below.
Settings after configuration
By default, the Flash size is set to 4MB (32Mb).
Please change this to 16MB (128Mb).
4 - Installing the MWings Library How to install the MWings library for using TWELITE
This guide explains the installation procedure for the MWings library used with TWELITE.
Installation Open Sketch -> Include Library -> Manage Libraries…
Location of the Library Manager
Type MWings in the search box and install MWings.
Library Manager
