Download example app from the Google Play store:

Brainboxes provides a JAR which allows easy integration of Brainboxes Remote IO modules into your Java code.

Requirements

• Windows, Linux, Mac OS X
• Android Studio
• Brainboxes Remote IO Module (e.g. ED-588, ED-038 etc)
• Basic Java Programming Knowledge
• The Brainboxes.IO.jar download here

Java Code Samples

Example Code

package com.brainboxes.edconsole2;

import android.annotation.TargetApi;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Build;
import android.os.Bundle;
import android.app.Activity;
import android.text.Editable;
import android.text.TextWatcher;
import android.text.method.ScrollingMovementMethod;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class MainActivity extends Activity {

    private EDDevice EDDevice;

    Button bConnect, bSend;
    EditText etIP1, etIP2, etIP3, etIP4, etPortNumber, etSendCommand;
    RelativeLayout rlIpAddress, rlPortNumber, rlSendCommand, rlConnect;
    TextView tvConsole;
    String ipAddress = "";
    int portNumber = 9500;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        InitializeUI();
        EditTextListeners();
        ButtonOnClickListeners();
    }

    @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
    public void InitializeUI() {
        rlIpAddress = (RelativeLayout) findViewById(R.id.rlIpAddress);
        rlPortNumber = (RelativeLayout) findViewById(R.id.rlPortNumber);
        rlConnect = (RelativeLayout) findViewById(R.id.rlConnect);
        rlSendCommand = (RelativeLayout) findViewById(R.id.rlSendCommand);
        rlSendCommand.setVisibility(View.GONE);
        bConnect = (Button) findViewById(R.id.bConnect);
        bSend = (Button) findViewById(R.id.bSend);
        etIP1 = (EditText) findViewById(R.id.etIP1);
        etIP2 = (EditText) findViewById(R.id.etIP2);
        etIP3 = (EditText) findViewById(R.id.etIP3);
        etIP4 = (EditText) findViewById(R.id.etIP4);
        etPortNumber = (EditText) findViewById(R.id.etPortNumber);
        etSendCommand = (EditText) findViewById(R.id.etSendCommand);
        etSendCommand.setAllCaps(true);
        tvConsole = (TextView) findViewById(R.id.tvConsole);
        tvConsole.append("nn");
        tvConsole.setMovementMethod(new ScrollingMovementMethod());
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    public void ButtonOnClickListeners() {
        bConnect.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (bConnect.getText().equals("Connect")) {
                    if(ConnectionBoxes()){
                        ipAddress = etIP1.getText() + "." + etIP2.getText() + "." + etIP3.getText() + "." + etIP4.getText();
                        portNumber = Integer.parseInt(etPortNumber.getText().toString());
                        EDDevice = new EDDeviceTCP(ipAddress, portNumber);
                        connect();
                    }
                }else{
                    disconnect();
                }
            }

        });
        bSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String command = (etSendCommand.getText().toString().toUpperCase()) + "r";
                String response;
                try {
                    response = EDDevice.SendCommand(command);
                    appendTextAndScroll("Sending:  " + command + "n");
                    appendTextAndScroll("Received: " + response + "nn");
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public void connect(){
        appendTextAndScroll("Connecting to " + ipAddress.toString() + "...n");
        try{
            System.out.println("Connecting...");
            EDDevice.Connect();
            System.out.println("Connected");
            appendTextAndScroll("Connected!nn");
            bConnect.setText("Disconnect");
            rlIpAddress.setVisibility(View.GONE);
            rlPortNumber.setVisibility(View.GONE);
            rlSendCommand.setVisibility(View.VISIBLE);
            bSend.setEnabled(true);
            etSendCommand.requestFocus();
        } catch (Exception e){
            System.out.println("Error Connecting: " + e.getMessage());
        }
    }

        public void disconnect(){
            EDDevice.Disconnect();
            bConnect.setText("Connect");
            appendTextAndScroll("Disconnectednn");
            rlIpAddress.setVisibility(View.VISIBLE);
            rlPortNumber.setVisibility(View.VISIBLE);
            rlSendCommand.setVisibility(View.GONE);
            bSend.setEnabled(false);
    }

    public void appendTextAndScroll(String text) {
        tvConsole.append(text);
        final int scrollAmount = tvConsole.getLayout().getLineTop(tvConsole.getLineCount()) - tvConsole.getHeight();
        if (scrollAmount [gt] 0)
            tvConsole.scrollTo(0, scrollAmount);
        else
            tvConsole.scrollTo(0, 0);
    }

    private void EditTextListeners() {
        etIP1.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {
            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {
                if (etIP1.getText().toString().length() == 3) {
                    etIP2.requestFocus();
                }
            }

            @Override
            public void afterTextChanged(Editable editable) {
            }
        });
        etIP2.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {
            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {
                if (etIP2.getText().toString().length() == 3) {
                    etIP3.requestFocus();
                }
            }

            @Override
            public void afterTextChanged(Editable editable) {
            }
        });
        etIP3.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {
            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {
                if (etIP3.getText().toString().length() == 3) {
                    etIP4.requestFocus();
                }
            }

            @Override
            public void afterTextChanged(Editable editable) {
            }
        });
        etIP4.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {
            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {
                if (etIP4.getText().toString().length() == 3) {
                    etPortNumber.requestFocus();
                }
            }

            @Override
            public void afterTextChanged(Editable editable) {
            }
        });
    }

    private boolean ConnectionBoxes() {
        boolean CanWeConnect = true;
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        DialogInterface.OnClickListener dialogInterface = new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
            }
        };
        if (etIP1.getText().length() == 0 || etIP2.getText().length() == 0 || etIP3.getText().length() == 0 || etIP4.getText().length() == 0) {
            builder.setMessage("Please enter a valid IP address");
            builder.setTitle("Incorrect IP Address");
            builder.setPositiveButton("OK", dialogInterface);
            builder.show();
            CanWeConnect = false;
        } else if (etPortNumber.getText().length() == 0) {
            builder.setMessage("Please enter a valid port number");
            builder.setTitle("Incorrect Port Number");
            builder.setPositiveButton("OK", dialogInterface);
            builder.show();
            CanWeConnect = false;
        }
        return CanWeConnect;
    }

}

Reference

For a full list of ASCII protocol commands which can be sent to the device see: Brainboxes Remote IO ASCII protocol reference