Example using the timer and event module to stagger LED animations on different color channels

StaggeredLEDAnimation.java

import com.mbientlab.metawear.api.MetaWearController;
import com.mbientlab.metawear.api.Module;
import com.mbientlab.metawear.api.controller.Event;
import com.mbientlab.metawear.api.controller.LED;
import com.mbientlab.metawear.api.controller.LED.ChannelDataWriter;
import com.mbientlab.metawear.api.controller.LED.ColorChannel;
import com.mbientlab.metawear.api.controller.Timer;

public class StaggeredLEDAnimation {
    ///< Duration for one pulse, in milliseconds
    private static final short DURATION= 5000;
    
    public static void programChannel(ChannelDataWriter writer) {
        writer.withHighIntensity((byte) 31)
                .withHighTime(DURATION / 2)
                .withFallTime(DURATION / 2)
                .withPulseDuration(DURATION)
                .withRepeatCount((byte) 1).commit();
    }
    
    public static void setup(final MetaWearController mwCtrllr) {
        final Event eventCtrllr= (Event) mwCtrllr.getModuleController(Module.EVENT);
        final Timer timerCtrllr= (Timer) mwCtrllr.getModuleController(Module.TIMER);
        final LED ledCtrllr= (LED) mwCtrllr.getModuleController(Module.LED);
        
        mwCtrllr.addModuleCallback(new Timer.Callbacks() {
            private byte green= -1, blue= -1;
            
            @Override
            public void receivedTimerId(byte timerId) {
                eventCtrllr.recordMacro(Timer.Register.TIMER_NOTIFY, timerId);
                
                if (green == -1) {
                    green= timerId;
                    programChannel(ledCtrllr.setColorChannel(ColorChannel.GREEN));
                } else {
                    programChannel(ledCtrllr.setColorChannel(ColorChannel.BLUE));
                    mwCtrllr.removeModuleCallback(this);
                }
                
                eventCtrllr.stopRecord();
                timerCtrllr.startTimer(timerId);
            }
        });
        
        programChannel(ledCtrllr.setColorChannel(ColorChannel.RED));
        
        ///< For API < 1.7.0 the 'delay' parameter is reversed, use false to delay the timer instead of true
        ///< For API >= 1.7.0, the delay parameter is correctly used.
        timerCtrllr.addTimer(DURATION, (short) 1, false);
        timerCtrllr.addTimer(DURATION * 2, (short) 1, false);
        
        ///< Play the pattern with autoplay enabled
        ledCtrllr.play(true);
    }
}