Waveshare A121 60GHz mmWave Radar Module, High-Precision PCR - UART/I2C/GPIO Interface
Waveshare A121 60GHz mmWave Radar Module, High-Precision PCR - UART/I2C/GPIO Interface - Image 2
Waveshare A121 60GHz mmWave Radar Module, High-Precision PCR - UART/I2C/GPIO Interface - Image 3
SKU: SENS-2416
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Waveshare A121 60GHz mmWave Radar Module, High-Precision PCR - UART/I2C/GPIO Interface

₹2,729.00 (Inclusive of all taxes)
Out of Stock

The Waveshare A121 is a 60GHz Pulsed Coherent Radar (PCR) module for high-precision motion, presence, and distance sensing. Featuring an integrated ARM Cortex-M4 MCU and supporting UART, I2C, and GPIO interfaces, it is designed for seamless integration into embedded systems, robotics, and industrial automation projects operating on 3.3V logic.

Features

  • 60GHz Pulsed Coherent Radar (PCR) technology for robust motion and micro-motion detection.
  • Integrated ARM Cortex-M4 MCU (STM32L431CBT6) with 128KB Flash and 64KB RAM for onboard processing.
  • Configurable detection range from 0.03 meters to 23 meters with high precision.
  • Supports UART, I2C, and GPIO (3.3V logic) interfaces for flexible system integration.
  • Wide operating temperature range of -40°C to +85°C for industrial environments.

Out of stock

Description

The Waveshare A121 leverages Acconeer’s 60GHz Pulsed Coherent Radar (PCR) technology to provide reliable detection of both macro-movements and subtle micro-motions, such as breathing or small gestures. This non-optical sensing method allows the module to operate effectively behind non-metallic enclosures like plastic or glass, making it suitable for discreet installations in smart home, security, and automation systems.

Its integrated STM32L431CBT6 microcontroller handles signal processing and algorithm execution on-board, reducing the computational load on the host system. The module’s wide supply voltage range (2.7V to 5.5V) and 3.3V logic compatibility ensure easy interfacing with common development platforms like Arduino, Raspberry Pi, ESP32, and industrial PLCs.

Key Features

  • Advanced PCR Technology: 60GHz mmWave radar provides high-resolution, reliable sensing unaffected by ambient light or acoustic noise.
  • Onboard Processing Power: Integrated ARM Cortex-M4 MCU enables complex motion detection algorithms and configurable sensitivity settings.
  • Robust Environmental Performance: Operates reliably across an industrial temperature range from -40°C to +85°C.
  • Flexible Communication: Offers multiple interface options (UART, I2C, GPIO) for straightforward integration into diverse electronic systems.
  • Non-Line-of-Sight Capable: Can detect motion and presence through common non-metallic materials, enabling concealed installations.
  • Compact and Lightweight Design: Small 39mm x 39mm footprint and minimal weight facilitate integration into space-constrained applications.

Applications

  • Human presence detection and occupancy sensing in smart buildings and office automation.
  • Proximity detection and gesture recognition for touchless interfaces in consumer electronics and public terminals.
  • Intrusion detection and perimeter security systems requiring robust, all-weather performance.
  • Robotics navigation and obstacle avoidance in dynamic or low-visibility environments.
  • Industrial machine guarding and safety systems where non-contact motion monitoring is critical.

Technical Specifications

Model NumberA121
Radar Frequency60 GHz (Pulsed Coherent Radar - PCR)
Detection Range0.03 m to 23 m
Onboard MCUARM Cortex-M4 (STM32L431CBT6)
Flash Memory128 KB
RAM64 KB
InterfaceUART, I2C, GPIO (3.3V logic)
Operating Voltage2.7 V to 5.5 V DC
Operating Temperature-40°C to +85°C
Dimensions (L x W)39 mm x 39 mm
Weight10 g

Frequently Asked Questions

What is the operating voltage range for the Waveshare A121 radar module?

The A121 module operates from a wide DC supply voltage range of 2.7V to 5.5V. Its communication interfaces (UART, I2C, GPIO) use 3.3V logic levels, making it compatible with most microcontrollers and single-board computers without requiring level shifters.

What communication interfaces does the A121 module support and how do I connect it?

The module supports UART (serial), I2C, and general-purpose GPIO interfaces, all operating at 3.3V logic. Connection is facilitated via the provided MX1.25 10-pin cable. You must configure the desired interface via software commands sent to the onboard MCU before initiating data communication.

Can this radar module detect motion through walls or enclosures?

Yes, the 60GHz mmWave signals can penetrate non-metallic materials like plastic, glass, and drywall. This allows the A121 module to be installed discreetly behind enclosures for applications like in-wall presence detection or concealed security systems, though detection range and sensitivity may be slightly attenuated.

What is the difference between macro-motion and micro-motion detection on this module?

The module's high-resolution PCR technology can distinguish between large movements (macro-motion, like walking) and very subtle movements (micro-motion, like breathing or small hand gestures). This dual capability enables advanced applications ranging from basic occupancy sensing to precise gesture control and vital sign monitoring.

Package Includes

  • 1 x Waveshare A121 60GHz mmWave Radar Module
  • 1 x MX1.25 10-Pin Cable

Additional Information

Weight 0.01 kg
Dimensions 3.9 × 3.9 cm

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