Arduino gesture sensor tutorial

In this tutorial, Author will hook up a gesture sensor to a dizmo. Author is going to use an Arduino and WebSockets.

Parts needed

• Sparkfun APDS-9660 Gesture Sensor
• Arduino Ethernet
• Level converter
• Breadboard
• Jumper cables
• Serial to USB Adaptor: https://www.sparkfun.com/products/9716

Code

#include <SPI.h>
    #include <Wire.h>
    #include <Ethernet.h>
    #include <SparkFun_APDS9960.h>

    // Enabe debug tracing to Serial port.
    #define DEBUG true
    #define STATICIP false

    // Pins
    #define APDS9960_INT    2 // Needs to be an interrupt pin

    // Here we define a maximum framelength to 64 bytes. Default is 256.
    #define MAX_FRAME_LENGTH 64

    #include <WebSocket.h>

    byte mac[] = { 0x90, 0xA2, 0xDA, 0x00, 0x91, 0x8C };

    #if STATICIP
    byte ip[] = {10,0,1,100};
    #endif

    // Create a Websocket server
    WebSocketServer wsServer;

    void onConnect(WebSocket &socket) {
    Serial.println("onConnect called");
    }

    // You must have at least one function with the following signature.
    // It will be called by the server when a data frame is received.
    void onData(WebSocket &socket, char* dataString, byte frameLength) {

    #ifdef DEBUG
    Serial.print("Got data: ");
    Serial.write((unsigned char*)dataString, frameLength);
    Serial.println();
    #endif

    // Just echo back data for fun.
    socket.send(dataString, strlen(dataString));
    }

    void onDisconnect(WebSocket &socket) {
    Serial.println("onDisconnect called");
    }


    // Global Variables
    SparkFun_APDS9960 apds = SparkFun_APDS9960();
    int isr_flag = 0;



    void setup() {
    #ifdef DEBUG  
    Serial.begin(9600);
    #endif

    #if STATICIP
    Ethernet.begin(mac, ip);
    #else
    if (Ethernet.begin(mac) == 0) {
    #if DEBUG
    Serial.println("Unable to set server IP address using DHCP");
    #endif
    for(;;)
    ;
    }
    #if DEBUG
    // report the dhcp IP address:
    Serial.println(Ethernet.localIP());
    #endif
    #endif

    wsServer.registerConnectCallback(&onConnect);
    wsServer.registerDataCallback(&onData);
    wsServer.registerDisconnectCallback(&onDisconnect);
    wsServer.begin();

    delay(100); // Give Ethernet time to get ready


    // Set interrupt pin as input
    pinMode(APDS9960_INT, INPUT);

    // Initialize interrupt service routine
    attachInterrupt(0, interruptRoutine, FALLING);

    // Initialize APDS-9960 (configure I2C and initial values)
    if ( apds.init() ) {
    Serial.println(F("APDS-9960 initialization complete"));
    } else {
    Serial.println(F("Something went wrong during APDS-9960 init!"));
    }

    // Start running the APDS-9960 gesture sensor engine
    if ( apds.enableGestureSensor(true) ) {
    Serial.println(F("Gesture sensor is now running"));
    } else {
    Serial.println(F("Something went wrong during gesture sensor init!"));
    }

    }

    void interruptRoutine() {
    isr_flag = 1;
    }

    String handleGesture() {
    String gesture;
    gesture="NONE  ";

    if ( apds.isGestureAvailable() ) {
    switch ( apds.readGesture() ) {
    case DIR_UP:
    Serial.println("UP   ");
    gesture="UP";
    break;
    case DIR_DOWN:
    Serial.println("DOWN");
    gesture="DOWN ";
    break;
    case DIR_LEFT:
    Serial.println("LEFT");
    gesture="LEFT ";
    break;
    case DIR_RIGHT:
    Serial.println("RIGHT");
    gesture="RIGHT";
    break;
    case DIR_NEAR:
    Serial.println("NEAR");
    gesture="NEAR  ";
    break;
    case DIR_FAR:
    Serial.println("FAR");
    gesture="FAR  ";
    break;
    default:
    Serial.println("NONE");
    gesture="NONE ";
    }
    }

    return gesture;

    }

    String rv;
    char gest[6];

    void loop() {
    // Should be called for each loop.
    wsServer.listen();

    // Do other stuff here, but don't hang or cause long delays.
      delay(100);

      if( isr_flag == 1 ) {
        detachInterrupt(0);
        rv=handleGesture();
        isr_flag = 0;
        attachInterrupt(0, interruptRoutine, FALLING);

      if (rv!="NONE ") {

        if (wsServer.connectionCount() > 0) {
          rv.toCharArray(gest, 6);
          wsServer.send(gest, 6);
        }

      } 

      }

    }

Result

If hold your finger a few centimeters above the sensor and move it left or right .. You should see the sensed gesture in this project

For more detailed information, refer to this url.

https://www.dizmo.com/arduino-gesture-sensor-tutorial/

Source : https://www.dizmo.com/arduino-gesture-sensor-tutorial/