STMicroelectronics STEVAL-IDI005V1

Overview

STEVAL-IDI005V1 from STMicroelectronics is an 868 MHz sub-GHz wireless sensor evaluation board powered by a CR2032 coin cell, integrating the SP1ML-868 certified RF module, LIS2DH 3-axis accelerometer, and HTS221 humidity/temperature sensor for ultra-low-power Smart Home sensing nodes.

For engineers reviewing the STEVAL-IDI005V1 datasheet, STEVAL-IDI005V1 pinout, STEVAL-IDI005V1 application, or STEVAL-IDI005V1 equivalent, this board supports P²P AT-command-based communication with STEVAL-SP1ML868, SWD reprogramming, and real-time serial telemetry of motion, ambient humidity, and temperature data.

Technical Context

The board implements a complete sub-GHz sensor node architecture: the SP1ML-868 module handles 868 MHz ISM-band RF transmission using AT command protocol over UART (TXD/RXD), while the LIS2DH and HTS221 communicate via shared I²C bus (SP1MOD_I2C1_SDA/SP1MOD_I2C1_SCL) with dedicated interrupt lines (SP1MOD_INT).

Power management centers on CR2032 battery operation with BAT54J Schottky diodes for reverse-polarity protection and low-quiescent-current biasing; the SP1ML SHDN pin enables hardware-controlled sleep mode, and NRST + SWDIO/SWCLK support full debug and firmware update capability.

Key Specifications

Availability

STEVAL-IDI005V1 is available at Aetrix Electronics and suitable for Smart Home sensor node development, heat allocator prototyping, wireless remote control validation, and sub-GHz industrial condition monitoring requiring stable component supply and rapid proof-of-concept iteration.

Supply support for STEVAL-IDI005V1 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 wireless solutions for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) platform family, engineered to accelerate time-to-proof for sub-GHz IoT sensor applications using certified modules and production-ready firmware stacks.

FAQ

Does STEVAL-IDI005V1 support over-the-air firmware updates?

No - it lacks built-in OTA capability. Firmware updates require physical connection via the 5-pin SWD interface using ST-LINK/V2 or compatible debuggers. The board ships with sample P²P AT-command firmware for sensor data streaming, but no bootloader enabling wireless reprogramming is included or documented.

What is the maximum communication range of the SP1ML-868 module on this board?

In open-field conditions with line-of-sight and matched antennas, the SP1ML-868 achieves up to 1 km range. Real-world indoor Smart Home deployment typically yields 30–100 m depending on wall materials and interference, as validated in ST's AN4792 application note for sub-GHz sensor networks.

Can the LIS2DH and HTS221 operate simultaneously without I²C bus contention?

Yes - both sensors share the same I²C bus (SP1MOD_I2C1_SDA/SP1MOD_I2C1_SCL) but use unique 7-bit addresses (LIS2DH: 0x18/0x19; HTS221: 0x5F), and the SP1ML MCU manages sequential polling with dedicated INT lines (SP1MOD_INT) to avoid arbitration conflicts during concurrent data acquisition.

Is external antenna required, or does the board include an integrated PCB trace antenna?

The board integrates a compact 868 MHz monopole PCB trace antenna directly routed from the SP1ML module's RF pin. No external antenna is needed; the design meets ETSI EN 300 220-1 radiated emission limits with this onboard solution, as confirmed in the module's certification report (CE RED ID: 0086-Sp1ML-868).