LamaPLC: APDS - Avago ALS and proximity detection sensors with I²C communication

The Avago APDS-9900, APDS-9930, and APDS-9960 are a series of integrated optical sensor modules that primarily offer ambient light sensing (ALS) and proximity detection, with the APDS-9960 adding advanced gesture recognition and RGB color sensing.

Feature Comparison

Communication: I²C communication, default address: 0x39

FOr APDS-9960 running on an Arduino, the SparkFun APDS-9960 Library “SparkFun APDS9960” is the industry standard.

#include <Wire.h>
#include <SparkFun_APDS9960.h>
 
#define APDS9960_INT 2 // Must be an interrupt pin
SparkFun_APDS9960 apds = SparkFun_APDS9960();
volatile bool isr_flag = false;
 
void setup() {
  Serial.begin(9600);
  pinMode(APDS9960_INT, INPUT);
 
  // Initialize interrupt service routine
  attachInterrupt(digitalPinToInterrupt(APDS9960_INT), interruptRoutine, FALLING);
 
  if (apds.init()) {
    Serial.println(F("APDS-9960 initialization complete"));
  } else {
    Serial.println(F("Something went wrong during APDS-9960 init!"));
  }
 
  // Start sensor gesture 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 loop() {
  if (isr_flag) {
    detachInterrupt(digitalPinToInterrupt(APDS9960_INT));
    handleGesture();
    isr_flag = false;
    attachInterrupt(digitalPinToInterrupt(APDS9960_INT), interruptRoutine, FALLING);
  }
}
 
void interruptRoutine() {
  isr_flag = true;
}
 
void handleGesture() {
  if (apds.isGestureAvailable()) {
    switch (apds.readGesture()) {
      case DIR_UP:    Serial.println("UP");    break;
      case DIR_DOWN:  Serial.println("DOWN");  break;
      case DIR_LEFT:  Serial.println("LEFT");  break;
      case DIR_RIGHT: Serial.println("RIGHT"); break;
      case DIR_NEAR:  Serial.println("NEAR");  break;
      case DIR_FAR:   Serial.println("FAR");   break;
      default:        Serial.println("NONE");
    }
  }
}

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