Chain PIR (STM32G031)

Name: Chain PIR (STM32G031)
Brand: M5Stack
SKU: U225

Best price from 1 store

£6.20 GBP

Lowest ever

Best price at The Pi Hut

Priced in GBP — no conversion needed

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1 viewed today

52-wk Low

£6.20

Average

£6.20

52-wk High

£6.20

Priceino Verdict

A quick read on fit, value and timing.

The Chain PIR (STM32G031) offers a balance of performance and flexibility for developers, though its value depends on the included accessories and build quality.

Good fit for

DIY home automation projectsSecurity and intrusion detection systemsEducational robotics and embedded systems learning

Avoid if

You need a simple plug-and-play sensor with no programmingYou require a very long detection range or wide field of view

Where to buy

Prices verified within 48 hours

★ The Pi Hut Best price In stock · Price checked 1 day ago £6.20 GBP Store currency Buy now

30-day price prediction

Price likely to remain stable over the next 30 days

40%

confidence

Price has been relatively stable over the last 30 days

Currently at all-time low — historically tends to rise after

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About this product

The Chain PIR (STM32G031) is a passive infrared motion sensor module powered by the STM32G031 microcontroller, designed for accurate human detection in DIY projects, smart home automation, and security systems. It features a 32-bit ARM Cortex-M0+ MCU, low power consumption, and flexible GPIO options for integration.

Key features

Powered by STM32G031 32-bit ARM Cortex-M0+ MCU for precise motion detection algorithms
Passive infrared (PIR) sensing technology for human body heat detection
Low power consumption suitable for battery-operated applications
Programmable GPIO pins for easy integration with microcontrollers and IoT platforms
Compact module design for embedding into DIY and commercial solutions

Pros

Uses reliable STM32G031 MCU for enhanced processing capabilities
Low idle current extends battery life in portable applications
Simple I/O interface works with common development boards
Ideal for custom automation and security setups

Cons

Limited detection range compared to larger PIR modules (typically 5-8 meters, check specs)
Requires knowledge of microcontroller programming for advanced use
May need additional components for voltage regulation in some applications

Buying advice

Who should consider this product and what to check before buying.

This Chain PIR is best for makers and professionals who need a motion sensor with a powerful MCU for custom logic. Verify the detection range and voltage requirements (likely 3.3V) before purchasing. Good value for those seeking programmability and low power.

Price History

Last updated · 1 store

Price Timeline

Key pricing milestones tracked by Priceino.

21 Aug 2026

First tracked

Priceino started monitoring this product

23 Oct 2026

Today — £6.20 · lowest ever

The cheapest we have ever recorded — a great time to buy

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Frequently asked questions

Common questions about buying this product.

Who is this product best for?

This product is best for electronics hobbyists, makers, and engineers who want a motion sensor with an integrated STM32G031 MCU to implement custom detection logic or low-power IoT applications.

What should shoppers check before buying?

Shoppers should verify the operating voltage (likely 3.3V), detection range and angle, output type (digital or analog), and whether it includes a lens and mounting hardware. Also check for documentation and example code to ensure it suits their project.

What is the best price for Chain PIR (STM32G031)?

The best current price for Chain PIR (STM32G031) is £6.20 at The Pi Hut. We track prices daily across multiple stores.

Is now a good time to buy Chain PIR (STM32G031)?

The price is around the historical average. Check our price history chart for trends.

How often does the price of Chain PIR (STM32G031) change?

We update prices daily. Use our price history chart to see how the price has changed over time and set a price alert to be notified when it drops.