The PAJ7620 integrates gesture recognition function with general I2C interface into a single chip forming an image analytic sensor system. It can recognize 9 human hand gesticulations such as moving up, down, left, right, forward, backward, circle-clockwise, circle-counter Key Parameters clockwise, and waving. It also offers built-in proximity detection in sensing approaching or departing object from the sensor. The PAJ7620 is packaged into module form in-built with IR LED and optics lens as a complete sensor solution.
- PAJ7620U2-based gesture recognition sensor, high accuracy, long detecting distance(the distance on the datasheet is 0-15cm, but actually it's up to 20cm during our test).
- We expanded a slow detection mode with 2s recognition cycle. Besides the original 9 gestures, we specifically expanded four gesutres for this mode: slowly move left and right, slowly move up and down, slowly move forward and backward, wave slowly and randomly, which is very suitable for the beginners.
Product Link（https://www.dfrobot.com/product-2003.html）
SKU：SEN0315
In this Arduino library, we will show you the basic usage of the PAJ7620 gesture sensor. You can experience the functions below using the built-in examples:
- Read the 9 gestures' function in fast mode.
- Read the function of the 9 basic gestures and 4 expanded gestures in slow mode.
- An example of gesture sequence recognition in fast mode, we call it gesture password.
There are two ways to use the library:
- Open the Arduino IDE, search for "DFRobot_BMX160" in Tools --> Manager Libraries on the status bar, and install the library.
- First download the library file, paste it into the \Arduino\libraries directory, then open the examples folder and run the demo in that folder.
/**
* @fn DFRobot_PAJ7620U2
* @brief init function
* @return return 0 if initialization succeeds, otherwise return non-zero.
*/
int begin(void);
/**
* @fn setGestureHighRate
* @brief Set gesture detection mode
* @param b true Set to fast detection mode, recognize gestures quickly and return.
* @n false Set to slow detection mode, system will do more judgements.
* @n In fast detection mode, the sensor can recognize 9 gestures: move left, right, up, down,
* @n forward, backward, clockwise, counter-clockwise, wave.
* @n To detect the combination of these gestures, like wave left, right and left quickly, users need to design their own
* @n 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 expanded gestures
* @n 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, forward, backward,
* @n clockwise, counter-clockwise, wave, slowly move left and right, slowly move up and down, slowly move forward and backward,
* @n wave slowly and randomly.
*/
void setGestureHighRate(bool b);
/**
* @fn gestureDescription
* @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 doesn't exist,
* @n return null string.
*/
String gestureDescription(eGesture_t gesture);
/**
* @fn getGesture
* @brief Get gesture
* @return Return gesture, could be any value except eGestureAll in eGesture_t.
*/
eGesture_t getGesture(void);| MCU | Work Well | Work Wrong | Untested | Remarks |
|---|---|---|---|---|
| Arduino Uno | √ | |||
| Mega2560 | √ | |||
| Leonardo | √ | |||
| ESP32 | √ | |||
| micro:bit | √ |
- 2021/10/20 - Version 1.0.1 released.
- 2019/07/16 - Version 1.0.0 released.
Written by Alexander([email protected]), 2019. (Welcome to our website)