The library is what your device needs to talk to the app: one header, InstantIoT.h. This page gives the two ways to get it and where the source lives.
Arduino Library Manager
In the Arduino IDE: Sketch → Include Library → Manage Libraries, search InstantIoT, install. Updates arrive the same way. Step by step: Install the library in the Arduino IDE.
GitHub
The source, the releases and the examples: github.com/jeanloickdt/InstantIoT. Download a release ZIP and extract it into your Arduino libraries/ folder for a manual install.
Supported devices
ESP32 (all variants), ESP8266, Arduino UNO R4 WiFi, MKR WiFi 1010, Nano 33 IoT, Uno WiFi Rev.2, and Arduino Mega over Ethernet — the table by connection: Install the library in the Arduino IDE.
Next
→ Connect your device: Wi-Fi, Ethernet, Bluetooth, Cloud or Direct.
