package com.ociweb.grove;
import static com.ociweb.iot.grove.GroveTwig.Button;

import com.ociweb.iot.maker.CommandChannel;
import com.ociweb.iot.maker.DeviceRuntime;
import com.ociweb.iot.maker.Hardware;
import com.ociweb.iot.maker.IoTSetup;
import com.ociweb.iot.maker.Port;
import com.ociweb.gl.api.GreenCommandChannel;

import static com.ociweb.iot.grove.GroveTwig.*;

import static com.ociweb.iot.maker.Port.*;

public class IoTApp implements IoTSetup
{
    ///////////////////////
    //Connection constants 
    ///////////////////////
    // // by using constants such as these you can easily use the right value to reference where the sensor was plugged in
      
    private static final Port BUTTON_PORT = D3;
    private static final Port RELAY_PORT  = D7;
    
    @Override
    public void declareConnections(Hardware c) {
        ////////////////////////////
        //Connection specifications
        ///////////////////////////
        
        // // specify each of the connections on the harware, eg which component is plugged into which connection.        
              
        c.connect(Button, BUTTON_PORT); 
        c.connect(Relay, RELAY_PORT);         
        //c.connect(LightSensor, LIGHT_SENSOR_PORT); 
        //c.connect(LED, LED_PORT);        
        c.useI2C();
        
    }


    @Override
    public void declareBehavior(DeviceRuntime runtime) {
        //////////////////////////////
        //Specify the desired behavior
        //////////////////////////////
        
        //  //Use lambdas or classes and add listeners to the runtime object
        //  //CommandChannels are created to send outgoing events to the hardware
        //  //CommandChannels must never be shared between two lambdas or classes.
        //  //A single lambda or class can use mulitiple CommandChannels for cuoncurrent behavior
        
        
                final CommandChannel channel1 = runtime.newCommandChannel(GreenCommandChannel.DYNAMIC_MESSAGING);
        //        //this digital listener will get all the button press and un-press events 
                runtime.addDigitalListener((port, connection, time, value)->{ 
        //            
        //            //connection could be checked but unnecessary since we only have 1 digital source
        //          
                	channel1.setValue(RELAY_PORT, value);
                	//{
                        //keep the relay on or off for 1 second before doing next command
                        //channel1.block(RELAY_PORT, 1000); 		
                    //}
                	
                 });
    }
        
  
}

package com.ociweb.grove;
import com.ociweb.iot.maker.*;
import static com.ociweb.iot.grove.GroveTwig.*;
import static com.ociweb.iot.maker.Port.*;

public class IoTApp implements IoTSetup
{
    private static final Port BUTTON_PORT = D3;
    private static final Port RELAY_PORT  = D7;
    
    @Override
    public void declareConnections(Hardware c) {
        c.connect(Button, BUTTON_PORT); 
        c.connect(Relay, RELAY_PORT);         
        c.useI2C();
    }

    @Override
    public void declareBehavior(DeviceRuntime runtime) {
    
        final CommandChannel channel1 = runtime.newCommandChannel(DYNAMIC_MESSAGING);
        runtime.addDigitalListener((port, connection, time, value)->{ 
            channel1.setValueAndBlock(RELAY_PORT, value == 1, 500); //500 is the amount of time in milliseconds that                                                                                         //delays a future action
        });
    }
}

Create IoTApp.java