fix #3

examples/AccelerometerTap/AccelerometerTap.ino

@@ -0,0 +1,49 @@
+/*
+  Arduino LSM6DS3 - Accelerometer Tap
+
+  this code is to detect tap
+  using IMU.accelerationAvailable()
+*/
+
+#include <Arduino_LSM6DS3.h>
+
+float tapThreshold  ;
+float xi, yi , zi ; 
+
+void setup() {
+
+  Serial.begin(9600);
+
+  while (!Serial);
+
+  while (!IMU.begin()) {
+    Serial.println("Failed to initialize IMU!");
+    delay(3000); // wait for 3 sec and check if it can be initialized again
+  }
+
+  if (IMU.accelerationAvailable()) {
+    IMU.readAcceleration(xi, yi, zi); //To set initial values of acceleration, including gravity and some zero error.
+  }
+
+  tapThreshold  = 0.05; //0.05 g acceleration in some direction is considered as tap. it can be changed for the required sensitivity.
+}
+
+void loop() {
+  float x, y, z;
+  if (IMU.accelerationAvailable()) {
+    IMU.readAcceleration(x, y, z);
+
+    // works on the difference from initial acceleration to the current acceleration
+    if (x -xi > tapThreshold || x-xi < -tapThreshold){
+      Serial.println("Tap detected across X-axis");
+    }
+
+    if (y-yi > tapThreshold || y-yi < -tapThreshold){
+      Serial.println("Tap detected across Y-axis");
+    }
+
+    if (z-zi > tapThreshold || z-zi < -tapThreshold)   {
+      Serial.println("Tap detected across Z-axis");
+    }
+  }
+}