STMicroelectronics STEVAL-BLUEPIRV1

Overview

STEVAL-BLUEPIRV1 from STMicroelectronics is an evaluation board implementing a wireless passive infrared (PIR) motion detector with Bluetooth® Low Energy v5.2 connectivity, built around the BlueNRG-M2SA module (Arm® Cortex®-M0), TSU102IST nanopower op-amp (580 nA quiescent current), and TS883IST dual nanopower comparator (0.9 V operation). It supports CR2032 coin-cell battery power and achieves ~1-year operational lifetime.

For engineers reviewing the STEVAL-BLUEPIRV1 datasheet, STEVAL-BLUEPIRV1 pinout, STEVAL-BLUEPIRV1 application, or STEVAL-BLUEPIRV1 equivalent, key selection considerations include PIR signal conditioning topology, sub-μA analog front-end power budget, BLE sensor node firmware compatibility via STBLESensor app, and PCB-level integration of Fresnel lens (IML-0688) and antenna layout for FCC/IC-certified radio performance.

Technical Context

The board implements a two-stage analog signal chain: first-stage amplification and filtering using the rail-to-rail TSU102IST op-amp (V_OS = 150 µV max, GBW = 11 kHz), followed by window comparison via the TS883IST dual comparator with independent hysteresis control. The STLQ020PUR LDO delivers stable 2.5 V to analog and digital sections at <1 µA quiescent current.

BLE communication is handled entirely by the embedded BlueNRG-M2SA module, which integrates flash memory, RF transceiver, and BLE stack - eliminating external host MCU requirements. Motion detection logic runs on-chip, with configurable interrupt output (DIO4/DIO5) and ADC inputs (ADC1/ADC2) for ambient light or temperature auxiliary sensing.

Key Specifications

Availability

STEVAL-BLUEPIRV1 is available at Aetrix Electronics and suitable for wireless security sensors, smart building occupancy monitors, and battery-powered IoT motion nodes requiring stable component supply, rapid prototyping validation, and FCC/IC-compliant BLE radio integration.

Supply support for STEVAL-BLUEPIRV1 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) series - purpose-built reference designs that demonstrate system-level implementation of sensor + connectivity + power management subsystems for rapid customer validation and design-in.

FAQ

Does STEVAL-BLUEPIRV1 require an external microcontroller to operate?

No. The BlueNRG-M2SA module integrates an Arm Cortex-M0 processor, flash memory, BLE protocol stack, and RF transceiver - enabling standalone motion detection, signal processing, and BLE advertising without any external host MCU. All firmware runs natively on the module.

What is the role of the TSU102IST and TS883IST on this board?

The TSU102IST op-amp amplifies and filters the weak AC signal from the IRA-S210ST01 PIR sensor, while the TS883IST dual comparator implements a precise window detection circuit to reject noise and confirm valid motion events before triggering the BLE module - both operating below 1 µA total quiescent current.

Can the detection range be extended beyond 5 m?

No - the 5 m range is fixed by the optical properties of the included IML-0688 Fresnel lens and the sensitivity of the IRA-S210ST01 PIR element. Range extension would require mechanical redesign (e.g., larger lens, higher-gain optics) and revalidation of analog signal chain stability and power consumption.

Is STBLESensor app source code or SDK available for custom firmware development?

Yes - ST provides the X-CUBE-BLE1 software expansion package, including BLE middleware, example projects, and full SDK access for custom firmware development on BlueNRG-M2SA. The STBLESensor app source (iOS/Android) is also publicly available on ST's GitHub repository under open-source license.