Grove - Gesture V1.0. Introduction. Features

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Brook Burns
5 years ago
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Grove - V1.0 Introduction The sensor on Grove - is PAJ7620U2 that integrates gesture recognition function with general I2C interface into a single chip.

1 Grove - V1.0 Introduction The sensor on Grove - is PAJ7620U2 that integrates gesture recognition function with general I2C interface into a single chip. It can recognize 9 basic gestures,and these gestures information can be simply accessed via the I2C bus. Application: You can use as an input device to control another grove, or a computer, mobile phone, smart car, robot, and more with a simple swipe of your hand. Features Built-in proximity detection Various main boards support : Arduino UNO/Seeeduino/Arduino Mega Basic gestures Up Down Left Right Forward Backward Clockwise Count Clockwise Wave

2 Tip More details about Grove modules please refer to Grove System Specification Spec Name Value Sensor Power supply Ambient light immunity speed in Normal Mode speed in Gaming Mode Interface type IIC interface Operating Temperature Dimensions Detection range PAJ7620U2 5V < 100k Lux 60 /s to 600 /s 60 /s to 1200 /s up to 400 kbit/s -40 C to +85 C 20 * 20mm 5-15mm With Arduino/Seeeduino Suggest Reading for Starter - Download Arduino and install Arduino driver - Getting Started with Seeeduino/Arduino Hardware Installation Grove products have a eco system and all have a same connector which can plug onto the Base Shield. Connect this module to the I2C port of Base Shield, however, without Base Shield, you can also connect Grove - to Arduino directly by jumper wires.

You can connect INT pad to digit 2 of Arduino by using jumper wire.

3 Arduino UNO Base Shield Grove - 5V I2C port VCC GND I2C port GND SDA I2C port SDA SCL I2C port SCL Digit 2 Not connected INT (Reserved pad) INT: detection interrupt flag mask. You can connect INT pad to digit 2 of Arduino by using jumper wire. Below image shows how to plug Grove - onto the I2C port of Base shield Then plug Base shield onto the Arduino UNO

4 Library We have created a library to help you start playing quickly with the Seeeduino/Arduino, in this section we ll show you how to set up the library and introduce some of the functions. Setup Download the library code as a zip file from the _PAJ7620 github page. Unzip the downloaded file into your /arduino/libraries. Rename the unzipped folder (or: _PAJ7620 ) Start the Arduino IDE (or restart if it is open). Simple Demo The following simple demo will show you a very easy application: When you move up, the red led will be turned on, otherwise the red led will be turned off. #include <Wire.h> #include "paj7620.h" void setup() paj7620init(); void loop() uint8_t data = 0; // Read Bank_0_Reg_0x43/0x44 for gesture result. paj7620readreg(0x43, 1, &data); // When different gestures be, the variable 'data' will be set to different values by paj7620readreg(0x43, 1, &data). if (data == GES_UP_FLAG) // When up gesture be,the variable 'data' will be set to GES_UP_FLAG. digitalwrite(4, HIGH); // turn the LED on (HIGH is the voltage level)

5 if (data == GES_DOWN_FLAG) // When down gesture be,the variable 'data' will be set to GES_DOWN_FLAG. digitalwrite(4, LOW); // turn the LED off by making the voltage LOW Description of functions These are the most important/useful function in the library, we invite you to look at the.h and.cpp files yourself to see all the functions available. 1.Initialize the gesture sensor chip PAJ7620 void setup() paj7620init(); This initialization code should be added to each demo. 2.Read data from PAJ7620 register via I2C - paj7620readreg(uint8_t addr, uint8_t qty, uint8_t data[]) - addr: Register address - qty: Number of data to read, addr continuously increase. - data[]: The starting address(a variable or array) to store data. void loop() uint8_t data = 0; // Read Bank_0_Reg_0x43/0x44 for gesture result. paj7620readreg(0x43, 1, &data); // When different gestures be, the variable 'data' will be set to different values by paj7620readreg(0x43, 1, &data). if (data == GES_UP_FLAG) // When up gesture be,the variable 'data' will be set to GES_UP_FLAG. digitalwrite(4, HIGH); // turn the LED on (HIGH is the voltage level)

6 if (data == GES_DOWN_FLAG) // When down gesture be,the variable 'data' will be set to GES_DOWN_FLAG. digitalwrite(4, LOW); // turn the LED off by making the voltage LOW We define some register data of gesture, refer to the following table. Register Data Register Address If Yes If Not Up data==ges_up_flag 0x43 Down data==ges_down_flag 0x43 Left data==ges_left_flag 0x43 Right data==ges_right_flag 0x43 Forward data==ges_forward_flag 0x43 Backward data==ges_backward_flag 0x43 Clockwise data==ges_clockwise_flag 0x43 Count Clockwise data==ges_count_clockwise_flag 0x43 Wave data==ges_wave_flag 0x44 Examples/Applications These examples are going to show you how to recognize gestures from this Grove -.] Open File->Examples->(or:_PAJ7620)->example->paj7620_9gestures sketch for a complete example.

7 Description: This example can recognize 9 gestures and output the result, including move up, move down, move left, move right, move forward, move backward, circleclockwise, circle-counter clockwise, and wave. You also can use as an input device to control another grove, or a computer, mobile phone, smart car, robot, and more with a simple swipe of your hand. Note When you want to recognize the Forward/Backward gestures, your gestures reaction time must less than GES_ENTRY_TIME(0.8s). You also can adjust the reaction time according to the actual circumstance. /* Notice: When you want to recognize the Forward/Backward gestures, your gestures' reaction time must less than GES_ENTRY_TIME(0.8s). You also can adjust the reaction time according to the actual circumstance. */ #define GES_REACTION_TIME 500 // You can adjust the reaction time according to the actual circumstance. #define GES_ENTRY_TIME 800 // When you want to recognize the Forward/Backward gestures, your gestures' reaction time must less than GES_ENTRY_TIME(0.8s). #define GES_QUIT_TIME 1000 Following are the main program used in the demo: void setup() uint8_t error = 0; Serial.begin(9600); Serial.println("\nPAJ7620U2 TEST DEMO: Recognize 9 gestures."); error = paj7620init(); // initialize Paj7620 registers if (error) Serial.print("INIT ERROR,CODE:");

8 Serial.println(error); else Serial.println("INIT OK"); Serial.println("Please input your gestures:\n"); void loop() uint8_t data = 0, data1 = 0, error; error = paj7620readreg(0x43, 1, &data); // Read Bank_0_Reg_0x43/0x44 for gesture result. if (!error) switch (data) // When different gestures be, the variable 'data' will be set to different values by paj7620readreg(0x43, 1, &data). case GES_RIGHT_FLAG: delay(ges_entry_time); paj7620readreg(0x43, 1, &data); if(data == GES_FORWARD_FLAG) Serial.println("Forward"); else if(data == GES_BACKWARD_FLAG) Serial.println("Backward");

9 else Serial.println("Right"); case GES_LEFT_FLAG: delay(ges_entry_time); paj7620readreg(0x43, 1, &data); if(data == GES_FORWARD_FLAG) Serial.println("Forward"); else if(data == GES_BACKWARD_FLAG) Serial.println("Backward"); else Serial.println("Left"); case GES_UP_FLAG: delay(ges_entry_time); paj7620readreg(0x43, 1, &data); if(data == GES_FORWARD_FLAG) Serial.println("Forward");

10 else if(data == GES_BACKWARD_FLAG) Serial.println("Backward"); else Serial.println("Up"); case GES_DOWN_FLAG: delay(ges_entry_time); paj7620readreg(0x43, 1, &data); if(data == GES_FORWARD_FLAG) Serial.println("Forward"); else if(data == GES_BACKWARD_FLAG) Serial.println("Backward"); else Serial.println("Down"); case GES_FORWARD_FLAG: Serial.println("Forward");

11 case GES_BACKWARD_FLAG: Serial.println("Backward"); case GES_CLOCKWISE_FLAG: Serial.println("Clockwise"); case GES_COUNT_CLOCKWISE_FLAG: Serial.println("anti-clockwise"); default: paj7620readreg(0x44, 1, &data1); if (data1 == GES_WAVE_FLAG) Serial.println("wave"); delay(100); In your own project, you may need multi-gestures instead of a single gesture to realise one function, welcome to share!

Grove - Mini I2C Motor Driver v1.0

Grove - Mini I2C Motor Driver v1.0 Introduction 3.3V 5.0V I2C This Grove - MIni I2C motor driver includes two DRV8830. The DRV8830 provides an integrated motor driver solution for battery-powered toys,