A121 60GHz mmWave Radar

A121 60GHz mmWave radar Micro-Motion Detection module, based on pulsed coherent radar (PCR) technology, supports high-precision distance measurements

mmWave Radar Sensor

60GHz mmWave Radar

Micro-Motion Detection module for detecting human motion and micro-motion
within the detection range

Version Options

A121 Range Sensor
Standard version, without holder

A121 Range Sensor Box
With holder (includes lens kit)

Features at a glance

The A121 Range Sensor is based on 60GHz Pulsed Coherent Radar (PCR) technology, enabling human presence and motion detection, supporting high-precision distance measurements. Its detection area and sensitivity parameters are configurable, offering excellent anti-interference capability. The module integrates an Arm Cortex-M4 MCU (STM32L431CBT6), allowing it to either function as a standalone unit with user applications directly deployed on the Acconeer RSS, or communicate with external host controllers via a register command protocol.
It features compact size, low power consumption, and easy integration, suitable for applications such as human presence detection, proximity sensing, contactless triggering, and vital signs monitoring.

• A121 60GHz Pulsed Coherent Radar (PCR), integrated Baseband, RF front-end, and Antenna, supports human presence detection, micro-motion detection, and high-precision distance measurements
• Integrated Arm Cortex-M4 MCU (STM32L431CBT6), up to 80MHz frequency, with 128KB Flash and 64KB RAM, supports local radar processing
• Compact 39 × 39 (mm) dimensions with optimized antenna structure, enabling high gain and stable detection
• 3.3V IO interface power supply
• Supports UART, I2C, and GPIO interfaces, outputting radar detection results based on a register protocol
• Supports behind-plastic or behind-glass installation, enabling reliable operation without additional openings in the enclosure
• Reserved PCB and SWD pads for RSS and user application development, as well as production line programming and testing
• Operating temperature: -40°C ~ 85°C, suitable for industrial and harsh environments

Specifications

Pinout Definition

Compatible With Multiple Platforms

Provides Demo And User Manual For Raspberry Pi, Raspberry Pi Pico, ESP32, and Arduino.
Easier To Develop And Integrate, And Better Expansibility

Raspberry Pi

Raspberry Pi Pico

ESP32

Arduino-Compatible Board

Visual Host Support

Easily connect to host software for configuration and debugging via a Type-C cable

* for reference only, please refer to the package content for detailed part list.

Direction & Detection Range

Detection Range Display

Flat cover lens

Hyperbolic lens

FZP (Fresnel Zone Plate) lens

Application Scenarios

Pulse Rate Monitoring

Velocity Measurement

Distance Measurement

Range Detection

Outline Dimensions

A121 Range Sensor (without holder)

A121 Range Sensor Box (with holder)

Resources & Services

Wiki: www.waveshare.com/wiki/A121_Range_Sensor

Weight: 0.028 kg

A121 Range Sensor

1. A121 Range Sensor x1
2. MX1.25 10PIN cable x1

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A121 Range Sensor Box

1. A121 Range Sensor Box x1
2. Hyperbolic lens x1
3. Flat cover lens x1
4. FZP lens x1
5. MX1.25 10PIN cable x1
6. Screws pack x1

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