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Gravity: PAJ7620U2 3D gesture recognition Sensor (3~20cm)

Reference

Last revision 2026/01/12

Library

API Description

Functions for reference:

DFRobot_PAJ7620U2(TwoWire *pWire=&Wire); 
 /**
  * @brief Constructor
  * @param mode Call the function and designate the device's default working mode. 
  */

 int begin(void) 
  /**
  * @brief Init function
  * @return Return 0 if the initialization succeeds, otherwise return non-zero.
  */

void setGestureHighRate(bool b);
  /**
  * @brief Set the gesture recognition mode 
   * @param b true Fast detection mode, recognize gestures quickly and return. 
   * @n  false Slow detection mode, the system will do more judgements. 
   * @n  In fast detection mode, the sensor can recognize 9 gestures: move left, right, up, down, forward,
   * @n  backward, clockwise, counter-clockwise, wave.  
   * @n  To detect the combination of these gestures, like wave left, right and left quickly, users need to  
   * @n  design their own algorithms logic. 
   * @n  Since users only use limited gestures, we didn't integrate too much expanded gestures in the library. 
   * @n  If necessary, you can complete the algorithm logic in the ino file by yourself.   
   * @n
   * @n
   * @n  In slow detection mode, the sensor recognize one gesture every 2 seconds, and we have integrated the       
   * @n  expanded gestures inside the library, which is convenient for the beginners to use.  
   * @n  The slow mode can recognize 9  basic gestures and 4 expanded gestures: move left, right, up, down,      
   * @n  forward, backward, clockwise, counter-clockwise, wave, slowly move left and right, slowly move up 
   * @n  and down, slowly move forward and backward, wave slowly and randomly.
   */

 String gestureDescription(eGesture_t gesture);
 /**
   * @brief Get the string descritpion corresponding to the gesture number. 
   * @param gesture Gesture number inlcuded in the eGesture_t
   * @return Textual description corresponding to the gesture number:if the gesture input in the gesture table      
   * @n doesn't exist, return null string 
   * @n Normally, it may return "None","Right","Left", "Up", "Down", "Forward", "Backward", "Clockwise",
   * @n "Anti-Clockwise", "Wave", "WaveSlowlyDisorder", "WaveSlowlyLeftRight", "WaveSlowlyUpDown",
   * @n "WaveSlowlyForwardBackward"
  */

eGesture_t getGesture(void);
/**
   * @brief Get gesture
   * @return The gesture value it may return: eGestureNone  eGestureRight  eGestureLeft  eGestureUp  
   * @n     eGestureDown  eGestureForward  eGestureBackward  eGestureClockwise
   * @n     eGestureWave  eGestureWaveSlowlyDisorder  eGestureWaveSlowlyLeftRight  
   * @n     eGestureWaveSlowlyUpDown  eGestureWaveSlowlyForwardBackward
   */

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