Analog Devices ADXL345 Accelerometer(SPI)

File:TArduinoADXL345Accelerometer SPI.png

Summary

Analog Devices ADXL345 3-axis digital accelerometer with SPI interface for advanced motion sensing applications.

Description

The **ADXL345 Accelerometer** provides 3-axis acceleration data with programmable full-scale ranges, advanced activity detection, free-fall detection, and tap sensing functionality. It features configurable resolution modes, power settings, activity/inactivity monitoring, and supports both single and double tap detection with adjustable thresholds and timing parameters. The sensor communicates via SPI interface.

Diagram:

Properties

• Enabled – Enables or disables the sensor (Default: True).
• Name – Component identifier name.
• SPISpeed – SPI communication speed in Hz (Default: 8000000).
• Full Scale Range – Acceleration measurement range (Default: a2g).
• High Resolution – High resolution mode (Default: True).
• Low Power – Low power mode (Default: False).
• Sampling Rate – Sampling rate in Hz (Default: 3200).
• Offsets – Acceleration offsets:
  • Enabled – Enables offset compensation (Default: False).
  • X – X-axis offset (Default: 0).
  • Y – Y-axis offset (Default: 0).
  • Z – Z-axis offset (Default: 0).
• Activity – Activity detection:
  • Active – Active state detection:
    • ACMode – AC-coupled mode (Default: True).
    • Threshold – Activity threshold in G (Default: 0.25).
    • X – X-axis activity detection (Default: True).
    • Y – Y-axis activity detection (Default: True).
    • Z – Z-axis activity detection (Default: True).
  • Inactive – Inactive state detection:
    • ACMode – AC-coupled mode (Default: True).
    • Threshold – Inactivity threshold in G (Default: 0.125).
    • Time – Inactivity time in seconds (Default: 0).
    • X – X-axis inactivity detection (Default: True).
    • Y – Y-axis inactivity detection (Default: True).
    • Z – Z-axis inactivity detection (Default: True).
    • Linked – Links activity/inactivity (Default: True).
• Free Fall – Free-fall detection:
  • Threshold – Free-fall threshold in G (Default: 0.44).
  • Time – Free-fall time in milliseconds (Default: 30).
• Sleep – Sleep mode configuration:
  • Auto Sleep – Auto sleep enable (Default: False).
  • Sampling Rate – Sleep sampling rate (Default: 8).
  • Sleep – Sleep mode enable (Default: False).
• Standby – Standby mode (Default: False).
• Tap – Tap detection configuration:
  • Suppress – Tap suppression enable (Default: True).
  • Threshold – Tap threshold in G (Default: 0.25).
  • Timing – Tap timing parameters:
    • Double Tap – Double tap settings:
      • Latency – Double tap latency (Default: 100).
      • Window – Double tap window in milliseconds (Default: 250).
    • Duration – Tap duration in milliseconds (Default: 9.375).
  • X – X-axis tap detection (Default: True).
  • Y – Y-axis tap detection (Default: True).
  • Z – Z-axis tap detection (Default: True).

Pins

Input Pins

• Clock – Sensor clock input.
• Chip Select – SPI chip select input.

Output Pins

• X (analog) – X-axis acceleration output in G.
• Y (analog) – Y-axis acceleration output in G.
• Z (analog) – Z-axis acceleration output in G.
• Tap: Single X (digital) – Single tap X-axis detection.
• Tap: Single Y (digital) – Single tap Y-axis detection.
• Tap: Single Z (digital) – Single tap Z-axis detection.
• Tap: Double X (digital) – Double tap X-axis detection.
• Tap: Double Y (digital) – Double tap Y-axis detection.
• Tap: Double Z (digital) – Double tap Z-axis detection.
• Free Fall: Out (digital) – Free-fall detection output.
• Activity: Active Out (digital) – Activity detection output.
• Activity: Active X (digital) – X-axis activity detection.
• Activity: Active Y (digital) – Y-axis activity detection.
• Activity: Active Z (digital) – Z-axis activity detection.
• Activity: Inactive Out (digital) – Inactivity detection output.
• Sleep: Out (digital) – Sleep status output.
• Interface (spi) – SPI communication interface.

Categories

• File:TArduinoDigitalCategory.png Category Digital – Digital sensor components.
• File:TArduinoSPICategory.png Category SPI – SPI-enabled devices.
• File:TArduinoSensorCategory.png Category Sensors – Motion sensors.
• File:TArduinoAccelerometerCategory.png Category Accelerometer – Acceleration sensors.