Sparkfun’s Coherent Pulse Radar Sensor Has An Acconeer XM125 60GHz Module, Penetrates Walls And Ranges Up To 20 Meters

SparkFun has launched a new Qwiic board for Acconeer

We’ve seen compact 24GHz or 60GHz radar devices for years, and late last year Supachai reviewed Seeed Studio’s mmWave sensor with ESPHome and Home Assistant as a solution based on frequency modulated continuous wave (FMCW) technology. accountant

Sparkfun Coherent Radar Sensor Specifications:

  • Accconeer -M4 MCU, up to 80 MHz, 128 KB Flash, 68 KB SRAM Size – 18.6 x 15 mm
  • A121 60 GHz Pulse Coherent Radar (PCR) package integrates baseband, RF front end and antenna Detects range, speed, motion and objects up to 20 meters Readout with millimeter accuracy Low power consumption
  • Baseband, RF front end and antenna integrated into the package
  • Detects distance, speed, movement and objects up to 20 meters away.
  • Accurate readings down to the millimeter
  • low energy consumption
  • STMicro STM32L431CBY6 32-bit Arm Cortex-M4 MCU, up to 80MHz, 128KB Flash, 68KB SRAM
  • Size – 18.6 x 15 mm
  • USB – 1 USB type connector with ESD protection diode for data lines, CH340C USB serial converter
  • 2x 11-pin horizontal Qwiic connector + 9-pin header extension with GPIO, I2C, UART, SWD, 5V, 3.3V, 1.8V, GND…
  • 2 horizontal Qwiic connectors
  • 11-pin + 9-pin connector supporting GPIO, I2C, UART, SWD, 5V, 3.3V, 1.8V, GND…
  • Bug fix – 2×5 SWD head trace
  • Various reset and boot buttons, power LED jumper, USB shield (SHLD), power LED (LED), I2C pull-up resistor (I2C), alarm (WU), I2C address (ADDR) – not yet implemented, addresses are currently fixed. there is. At 0x52
  • Reset and boot button
  • LED signal
  • Jumper USB Shield (SHLD) Power LED (LED) I2C Pull-up Resistor (I2C) Wakeup (WU) I2C Address (ADDR) – Not yet implemented, address currently fixed at 0x52.
  • USB Shield (SHLD)
  • Power indicator (LED)
  • I2C (I2C) pull-up resistor
  • wake up (ouch)
  • I2C Address (ADDR) – Not yet implemented, the address is currently fixed at 0x52.
  • Power management voltage – 5V or 3.3V (all logic is 3.3V) AP2112K voltage regulator 3.3V/600mA RT9080 voltage regulator 1.8V/600mA
  • Voltage – 5V or 3.3V, but all logic is 3.3V.
  • AP2112K 3.3V/600mA voltage regulator
  • RT9080 1.8V/600mA voltage regulator
  • Size – 50.8 x 25.4 mm
  • Weight – 6.35g
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This module is open source hardware and Sparkfun provides PDF schematics and Eagle’s hardware design files. The Arduino library is also on GitHub, and instructions on how to get started can be found on the documentation site. The XM125 breakout board must connect to an Arduino-compatible Qwicci connector board and use both Arduino code and STM32 tools. Sparkfun says it’s not as easy to use as other boards because it requires some extra steps.

In addition to measuring distances with millimeter accuracy, the device can also detect movement, measure the speed of an object, and support gesture recognition. In the video below, you can see a video of human distance measurement, including a demonstration of how it works through walls, which is impossible with ultrasonic or ToF sensors.

Sparkfun sells the “Coherent Pulse Radar Sensor – Acconeer XM125 (Qwiic)” module for $49.95 plus shipping.

Jean-Luc started working part-time at CNX in 2010 before leaving as a software engineering manager, and began writing daily news and reviews full-time in late 2011.

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