CodeCell: Sensing Tap Detection

CodeCell includes a built-in BNO085 motion sensor capable of detecting tap gestures through its onboard accelerometer and sensor fusion algorithms. 

How it Works

The BNO085 continuously monitors acceleration patterns and detects sudden short impulses that match a “tap” motion. Tap detection is handled entirely by the sensor and read through the CodeCell Library, which makes it easy to use with just two lines of code:

myCodeCell.Init(MOTION_TAP_DETECTOR);   // Enable tap detection mode

if (myCodeCell.Motion_TapRead()) {
  // Executes when a tap is detected
}

Each tap triggers a digital flag that can be used to control LEDs, motors, or other actions -all without writing any complex filtering logic.

Example 1 – Basic Tap Detection

This example lights up CodeCell’s onboard LED in yellow for one second whenever a tap is detected.

#include <CodeCell.h>

CodeCell myCodeCell;

void setup() {
  Serial.begin(115200);
  myCodeCell.Init(MOTION_TAP_DETECTOR);  // Enable tap detection
}

void loop() {
  if (myCodeCell.Run(10)) {              // Run at 10 Hz
    if (myCodeCell.Motion_TapRead()) {   // Detect tap
      myCodeCell.LED(0xA0, 0x60, 0x00);  // Yellow LED feedback
      delay(1000);                       // Hold LED for 1 second
    }
  }
}

Customization Tips

• Change LED Feedback: Modify the LED color or brightness for different tap patterns.
• Expand Actions: Trigger buzzers, actuators, or other modules for more interactive effects.
• Combine Sensors: Mix tap detection with light or proximity sensing to create gesture-based projects.