tapdemo.ino

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// Basic demo for tap/doubletap readings from Adafruit LIS3DH
 
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_LIS3DH.h>
#include <Adafruit_Sensor.h>
 
// Used for software SPI
#define LIS3DH_CLK 13
#define LIS3DH_MISO 12
#define LIS3DH_MOSI 11
// Used for hardware & software SPI
#define LIS3DH_CS 10
 
// software SPI
//Adafruit_LIS3DH lis = Adafruit_LIS3DH(LIS3DH_CS, LIS3DH_MOSI, LIS3DH_MISO, LIS3DH_CLK);
// hardware SPI
//Adafruit_LIS3DH lis = Adafruit_LIS3DH(LIS3DH_CS);
// I2C
Adafruit_LIS3DH lis = Adafruit_LIS3DH();
 
// Adjust this number for the sensitivity of the 'click' force
// this strongly depend on the range! for 16G, try 5-10
// for 8G, try 10-20. for 4G try 20-40. for 2G try 40-80
#define CLICKTHRESHHOLD 80
 
void setup(void) {
#ifndef ESP8266
  while (!Serial) yield();     // will pause Zero, Leonardo, etc until serial console opens
#endif
 
  Serial.begin(9600);
    Serial.println("Adafruit LIS3DH Tap Test!");
  
  if (! lis.begin(0x18)) {   // change this to 0x19 for alternative i2c address
    Serial.println("Couldnt start");
    while (1) yield();
  }
  Serial.println("LIS3DH found!");
  
  lis.setRange(LIS3DH_RANGE_2_G);   // 2, 4, 8 or 16 G!
  
  Serial.print("Range = "); Serial.print(2 << lis.getRange());  
  Serial.println("G");
 
  // 0 = turn off click detection & interrupt
  // 1 = single click only interrupt output
  // 2 = double click only interrupt output, detect single click
  // Adjust threshhold, higher numbers are less sensitive
  lis.setClick(2, CLICKTHRESHHOLD);
  delay(100);
}
 
 
void loop() {
  uint8_t click = lis.getClick();
  if (click == 0) return;
  if (! (click & 0x30)) return;
  Serial.print("Click detected (0x"); Serial.print(click, HEX); Serial.print("): ");
  if (click & 0x10) Serial.print(" single click");
  if (click & 0x20) Serial.print(" double click");
  Serial.println();
 
  delay(100);
  return;
}