STMicroelectronics STEVAL-SMARTAG1

Overview

STEVAL-SMARTAG1 from STMicroelectronics is an NFC-enabled sensor node evaluation board integrating ST25DV64K dynamic NFC tag, STM32L031K6 ARM Cortex-M0+ MCU, LIS2DW12 3-axis accelerometer, LPS22HB barometric pressure sensor, HTS221 humidity/temperature sensor, and STLQ015 low-quiescent LDO - all powered via CR2032 battery or NFC energy harvesting. It supports real-time sensor data logging and configuration over NFC on Android/iOS.

For engineers reviewing the STEVAL-SMARTAG1 datasheet, STEVAL-SMARTAG1 pinout, STEVAL-SMARTAG1 application, or STEVAL-SMARTAG1 equivalent, this page details its sensor fusion architecture, NFC-powered operation mode, ultra-low-power sensor node design, and compatibility with STM32Cube FP-SNS-SMARTAG1 firmware and ST SmarTag mobile apps.

Technical Context

The board implements a self-contained, battery-optional sensor node where the ST25DV64K serves as both NFC interface and I²C slave EEPROM, enabling contactless read/write of sensor logs and configuration without MCU wake-up. The STM32L031K6 executes sensor acquisition, preprocessing, and NFC command handling in sub-μA sleep modes between events.

Sensor data path includes LIS2DW12 (±2g/±4g/±8g/±16g FS, ODR up to 1.6 kHz), LPS22HB (absolute pressure 260–1260 hPa, RMS noise 0.007 hPa), and HTS221 (20–95% RH ±3.5%, 0–60°C ±0.5°C), all interfaced via shared I²C bus with configurable interrupts routed to the MCU.

Key Specifications

Availability

STEVAL-SMARTAG1 is available at Aetrix Electronics and suitable for IoT asset tracking, cold-chain monitoring, smart packaging validation, and battery-constrained environmental sensing applications requiring stable component supply and rapid prototyping capability.

Supply support for STEVAL-SMARTAG1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, sensors, power ICs, and analog/mixed-signal devices for industrial, automotive, and consumer markets.

This board belongs to ST's Smart Sensor Node evaluation platform family, engineered to accelerate development of NFC-enabled, ultra-low-power wireless sensing solutions for logistics, healthcare, and smart infrastructure applications.

FAQ

Does STEVAL-SMARTAG1 support NFC energy harvesting only, or can it operate solely on CR2032 battery?

Yes, STEVAL-SMARTAG1 operates in dual-power mode: it functions autonomously using the onboard CR2032 coin cell, and also supports NFC energy harvesting via the ST25DV64K to power the sensor node during NFC communication - eliminating battery drain during read operations.

What software tools are required to customize sensor behavior or update firmware?

Customization requires STM32CubeMX for initialization code generation, STM32CubeIDE for firmware development, and the official FP-SNS-SMARTAG1 function pack - which includes drivers, middleware, and sample projects for sensor fusion, NFC command parsing, and data logging.

Can the LIS2DW12 accelerometer trigger wake-up events independently of the MCU?

Yes, the LIS2DW12 integrates autonomous motion detection features including free-fall, tap recognition, and 6D orientation change - all configurable to assert interrupt signals directly to the STM32L031K6's EXTI pins, enabling wake-from-stop without CPU polling.

Is the LPS22HB pressure sensor calibrated at factory, and does it require user calibration before deployment?

The LPS22HB is fully factory-calibrated for pressure and temperature compensation; no user calibration is needed. Its digital output delivers compensated hPa values directly via I²C, with typical accuracy of ±0.1 hPa over 95% of its 260–1260 hPa operating range.