SparkFun Pulsed Coherent Radar Sensor - Acconeer XM125 Qwiic

The SparkFun Pulsed Coherent Radar Sensor with Acconeer XM125 uses 60GHz pulsed coherent radar to measure distance, speed, and motion. It can distinguish stationary objects from moving targets and supports applications such as presence detection, level measurement, gesture recognition, and robot navigation.

The board includes two Qwiic connectors for solderless I2C integration, a USB-C connector with a CH340C USB-to-serial converter, and 2.54mm-spaced pins for breadboard use. Depending on the target, environment, and optional lens, the measurable range can reach up to 20m.

Highlighted features

• 60GHz pulsed coherent radar with Acconeer A121 sensor
• Detects distance, speed, motion, and objects
• Distinguishes stationary objects from moving targets
• Two horizontal Qwiic connectors for I2C
• USB-C connection with CH340C USB-to-serial converter
• Reset and boot buttons for configuration and firmware management
• Arduino library available for presence and distance detection

Technical specifications

• Radar frequency: 60GHz
• Measurement range: up to 20m, depending on target and application
• Supply voltage: 5V or 3.3V
• Logic level: 3.3V
• Microcontroller: STM32L431CBY6, 32-bit Arm Cortex-M4
• Clock speed: 80MHz
• Flash memory: 128kB
• RAM: 68kB
• Interfaces: I2C and USB serial
• Default I2C address: 0x52
• I2C pull-up resistors: 2.2kΩ
• Qwiic connectors: 2
• Dimensions: 25.4mm x 50.8mm
• Weight: 6.35g