IoTsmart ESP32-S3 is a compact controller based on the Waveshare ESP32-S3-Tiny. Designed as a "brain" for the loTextra series , it features dual-core processing , Wi-Fi/Bluetooth , and a rich interface set including EYESPI for displays and dual Qwiic connectors for I2C sensors. It supports Tasmota, Node-RED, and IoTflow , making it an ideal choice for smart automation and edge computing . Full documentation about the module and its use with platforms is available on GitHub.
IoTsmart ESP32-S3 is a high-performance computing module built on the Espressif ESP32-S3 SoC, specifically designed to integrate seamlessly with the IoTextra series of expansion boards (mezzanines). This module acts as the "brain", upgrading standard mezzanines into intelligent, programmable standalone devices for industrial automation, smart home solutions, and edge logic.
Powerful Processing: Features the Xtensa 32-bit LX7 dual-core processor (up to 240 MHz) with 512KB SRAM and 384KB ROM.
Enhanced Memory: Equipped with onboard 2MB PSRAM and 4MB Flash memory to handle demanding applications.
Robust Wireless Suite: Integrated 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth® 5 (LE) for versatile communication.
Optimized Form Factor: The version 2.01 features a compact 47x30 mm footprint for better mechanical compatibility with IoTextra mezzanines.
EYESPI Interface (Optional): Includes a standardized 18-pin FPC connector for plug-and-play support of various LCD and E-Ink displays.
Please check the configuration options.
Dual Qwiic® Connectors: Two onboard connectors allow for easy daisy-chaining of I²C sensors and peripherals without additional hubs.
Persistent Storage: An onboard EEPROM (8 Kbit) stores configuration and user data, accessible via I²C at addresses 0x54-0x57
| Parameter | Specification |
| Microcontroller |
Waveshare ESP32-S3-Tiny |
| Core |
Xtensa 32-bit LX7 dual-core, up to 240MHz |
| Power Supply |
+5VDC via 2-pin PWR connector or Tiny Adapter Board |
| Consumption |
~25 mA (typical) up to 1000 mA max (with mezzanine) |
| I/O Interface |
12-pin HOST connector (H-HOST or V-HOST options) |
| Dimensions |
47x30 mm |
The module offers two orientations for the HOST connector to suit your project's physical layout:
H-HOST (Horizontal): Mounted on the top-side for vertical mezzanine installation.
V-HOST (Vertical): Mounted on the bottom-side for horizontal mezzanine installation.
The IoTsmart ESP32-S3 offers native support for popular IoT platforms and libraries:
IoTflow and Node-RED.
Tasmota, ESPHome, and Blynk.
LVGL for high-performance graphics via the EYESPI interface.
This module is compatible with the entire IoTextra ecosystem, including:
Digital: IoTextra Input, Relay2, SSR Small, Octal, Octal2.
Analog: IoTextra Analog, Analog3.
Hybrid: IoTextra Combo, Combo2.
Note: USB Type-C Tiny Adapter Board, cables, and mezzanines are sold separately.