STMicroelectronics STEVAL-IDI004V2

Overview

STEVAL-IDI004V2 from STMicroelectronics is an IoT wireless bridge evaluation kit supporting concurrent Wi-Fi (2.4 GHz IEEE 802.11 b/g/n), Sub-GHz RF (868 MHz ETSI-certified), Bluetooth Classic v3.0, and NFC (13.56 MHz) communication protocols. It uses an STM32F103RET6 microcontroller as protocol translator, interfaces modules via UART (Wi-Fi/Bluetooth/Sub-GHz) and SPI (NFC), and powers from a 5 V, 1 A wall adapter.

For engineers reviewing the STEVAL-IDI004V2 datasheet, STEVAL-IDI004V2 pinout, STEVAL-IDI004V2 application, or STEVAL-IDI004V2 equivalent, this board serves as a root node in 6LoWPAN Contiki 3.0 mesh networks, enables PC-based configuration via USB VCOM and GUI, supports Android app access to sensor node data over Bluetooth, and provides debug logging and multi-interface status indication via five LEDs.

Technical Context

The board integrates four certified radio modules: SPWF01SA.11 (Wi-Fi with integrated TCP/IP stack and TLS/SSL security), SP1ML-868 (868 MHz Sub-GHz using SPIRIT1 transceiver + STM32L1 MCU + balun), SPBT2632C2A (Bluetooth v3.0 with CE/FCC/IC/TELEC certification and low-power mode), and CR95HF (NFC transceiver with SPI interface and PCB antenna).

Communication between modules and the STM32F103 host is strictly segregated: UART3 for Sub-GHz, UART1 for Bluetooth, UART2 for Wi-Fi, and SPI3 for NFC. All modules expose AT command sets for configuration, and firmware updates are supported over-the-air (Wi-Fi) or via SWD (STM32F103 and SP1ML-868).

Key Specifications

Availability

STEVAL-IDI004V2 is available at Aetrix Electronics and suitable for smart home gateway development, industrial IoT mesh network prototyping, and multi-protocol wireless interoperability validation requiring stable component supply and full-stack evaluation capability.

Supply support for STEVAL-IDI004V2 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, Switzerland, designing and manufacturing microcontrollers, sensors, power ICs, and wireless solutions for industrial, automotive, and consumer applications.

This evaluation kit belongs to ST's IoT Connectivity & Sensor Solutions product line, engineered to accelerate development of interoperable, standards-compliant wireless gateways for heterogeneous sensor networks.

FAQ

Does STEVAL-IDI004V2 support firmware updates over Wi-Fi?

Yes - the SPWF01SA.11 Wi-Fi module supports secure over-the-air (OTA) firmware updates using TLS/SSL encryption. The STM32F103 host MCU manages update scheduling and integrity verification before applying new firmware images to the Wi-Fi module.

Can STEVAL-IDI004V2 operate as a standalone mesh root node without a PC?

Yes - once configured via the PC GUI, the board functions autonomously as a root node in a 6LoWPAN Contiki 3.0 mesh network. It relays sensor data from STEVAL-IDI002V2/3V2 nodes and exposes it via Bluetooth to Android devices without ongoing PC connection.

What NFC standards does the CR95HF transceiver support on this board?

The CR95HF supports ISO/IEC 14443 Type A and B, ISO/IEC 15693, and NFC Forum Tag Types 1 through 4. It interfaces exclusively via SPI (PB3–PB5, PA15) and drives a 13.56 MHz PCB etched antenna with matching network components (C41–C44, L13, R17–R22).

Is the Sub-GHz module compatible with LoRaWAN or only proprietary protocols?

The SP1ML-868 module uses the SPIRIT1 transceiver and supports proprietary Sub-GHz protocols only - it does not implement LoRa modulation or LoRaWAN stack. Its 868 MHz operation complies with ETSI EN 300 220 but requires custom MAC/PHY layer implementation for mesh networking.