Perancangan Viskometer Digital Berbasis Arduino Uno Untuk Mengukur Viskositas Cairan Dan Smartphone Android Sebagai Display

(1)

LAMPIRAN 1

Tampilan Alat

Gambar 1. Sistem Sensor didalam Kotak Hitam

(2)

(3)

LAMPIRAN 2

Tampilan aplikasi pada Android

Gambar 1. Tampilan awal

aplikasi

Gambar 2. Tampilan menu

Gambar 3. Tampilan menu

setting

(4)

LAMPIRAN 3

Gambar 5. Tampilan setelah

jarak sensor diatur

Gambar 6. Perhitungan

viskositas gliserin

Gambar 7. Perhitungan

(5)

1 Program Untuk Modul Arduino

#include <Usb.h>

#include <AndroidAccessory.h>

//jenis paket yang akan dikirim

#define perintah 0x1

#define targetTerima 0x2

#define comAtur 0x3

#define tarAtur 0x4

#define koma 0x5

AndroidAccessory acc("ajirdoank",

"Vizcouz",

"1.0",

"http://www.brainhover.blogspot.co.vu",

"123456789");

//pin analog yang digunakan

#define ldr1 2

#define ldr2 0

byte msg[6];

int xAmbang = 10;

int yAmbang = 100;

int valLdr1;

int valAkhirLdr1;

int valLdr1Kirim;

boolean valLdr1Picu;

int valLdr2;

int valAkhirLdr2;

int valLdr2Kirim;

(6)

float ubah1 = 0;

Serial.begin(9600);

acc.powerOn();

if(valLdr1Picu)

{

return;

}

(7)

//baca nilai ldr1;

valLdr1 = analogRead(ldr1);

//jika selisih prubahan ldr1 lebih besar dari nilai yAmbang;

if(abs(valAkhirLdr1 - valLdr1) >= yAmbang)

{

//Serial.print("ldr1 = ");

//Serial.print(valLdr1);

valAkhirLdr1 = valLdr1;

}

//jika nilai ldr1 yg skrang besar dari nilai awal ldr1;

if(valAkhirLdr1 > valLdr1)

{

//hitung persentase perubahan nilai;

ubah1 = ((float)(valAkhirLdr1 - valLdr1) / (float)valLdr1)

* 1000;

//nah jika nilai presentase perubahan tersebut lebih besar

dari nilai xAmbang;

if(ubah1 > xAmbang)

//nilai ldr1 yg sekarang dikembalikan dengan nilai ldr1 yg

(8)

}

//baca nilai ldr2;

valLdr2 = analogRead(ldr2);

//jika selisih prubahan ldr2 lebih besar dari nilai yAmbang;

if(abs(valAkhirLdr2 - valLdr2) >= yAmbang)

{

//Serial.print(" ldr2 = ");

//Serial.print(valLdr2);

}

//cek ldr2 hanya jika ldr1 udah terpicu;

if(valLdr1Picu && valAkhirLdr2 > valLdr2)

{

//hitung persentase perubahan dari ldr2;

ubah2 = ((float)(valAkhirLdr2 - valLdr2) / (float)valLdr2)

* 2000;

//jika nilai ubah2 lebih besar daripada nilai xAmbang;

if(ubah2 > xAmbang)

}

void kirimData(){

if (acc.isConnected()){

msg[0] = perintah;

(9)

msg[2] = (byte) (val >> 24);

msg[3] = (byte) (val >> 16);

msg[4] = (byte) (val >> 8);

msg[5] = (byte) (val);

acc.write(msg, 6);

delay(2);

}

void atur(){

if (acc.isConnected()){

int len = acc.read(msg, sizeof(msg), 1);

if(len > 0){

if(msg[0] == comAtur){

if(msg[1] == tarAtur){

byte titik = msg[2];

if(titik == koma){

reset();

}

delay(2);

}

void loop()

{

if(acc.isConnected());

cekLdr1();

cekLdr2();

atur();

delay(1);

}

2 Program Untuk Aplikasi Android

(10)

2.1.1 main.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/RelativeLayout1"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="@color/white"

android:gravity="center_horizontal"

tools:context=".Veloz" >

<TextView

android:id="@+id/viscText"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@+id/LH1"

android:layout_centerHorizontal="true"

android:layout_marginTop="95dp"

android:text="@string/viscV"

android:textSize="16pt"

android:textAppearance="?android:attr/textAppearanceLarge"

/>

<GridLayout

android:id="@+id/LH4"

android:layout_width="match_parent"

android:layout_alignParentLeft="true"

android:layout_below="@+id/viscText"

android:columnCount="7"

android:orientation="horizontal" >

<Button

android:id="@+id/button1"

(11)

android:width="150dp"

android:height="20dp"

android:layout_column="6"

android:layout_gravity="center_horizontal|bottom"

android:layout_marginBottom="15dp"

android:layout_row="0"

android:text="@string/rstButton"

android:textSize="7pt" />

</GridLayout>

<GridLayout

android:id="@+id/LH1"

android:layout_width="400dp"

android:layout_height="30dp"

android:layout_alignParentTop="true"

<TextView

android:id="@+id/textTime"

android:layout_gravity="center_horizontal|left"

android:layout_marginLeft="20dp"

android:text="@string/waktu"

android:textAppearance="?android:attr/textAppearanceMedium"

android:textColorHint="@color/black"

<Space

android:layout_gravity="fill_vertical"

android:layout_row="3" />

(12)

android:id="@+id/UnitTime"

android:layout_gravity="center_horizontal|right"

android:layout_marginRight="20dp"

android:layout_gravity="center_horizontal|top"

android:layout_marginLeft="25pt"

android:layout_width="wrap_content"

android:layout_below="@+id/viscText"

android:text="@string/viscUnit"

android:layout_alignParentLeft="true"

android:layout_alignParentTop="true"

<TextView

(13)

android:layout_gravity="center_horizontal|left"

android:layout_marginLeft="20dp"

android:text="@string/jarakPisah"

android:textAppearance="?android:attr/textAppearanceMedium"

android:textColorHint="@color/black"

<Space

android:layout_gravity="fill_vertical"

android:layout_row="3" />

<TextView

android:id="@+id/TextView02"

android:layout_gravity="center_horizontal|right"

android:layout_marginRight="20dp"

android:text="@string/jarakSatuan"

<TextView

android:id="@+id/SensSD"

android:layout_gravity="center_horizontal|top"

android:layout_marginLeft="25pt"

android:text="@string/jarakTx"

</GridLayout>

</RelativeLayout>

(14)

<item

android:id="@+id/aboutMe"

android:title="@string/about_me"/>

<item

android:id="@+id/setting"

android:title="@string/setting"/>

<item

android:id="@+id/instruct"

android:title="@string/instrux"/>

<item

android:id="@+id/exit"

android:title="@string/extButton"/>

</menu>

2.2 Untuk Java Source Code

2.2.1 Ajirdoank/src/Veloz.java

package com.ajirdoank.velozity;

//script untuk menerima dan mengirimkan byte ke Arduino

//ditulis oleh achmad muhajir

//@ajirdoank

import java.io.IOException;

import java.io.FileDescriptor;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.text.DecimalFormat;

import com.ajirdoank.velozity.Prefs;

import android.os.Bundle;

import android.os.ParcelFileDescriptor;

import android.preference.PreferenceManager;

(15)

import android.app.PendingIntent;

import android.content.BroadcastReceiver;

import android.content.Intent;

import android.content.IntentFilter;

import android.content.Context;

import android.content.SharedPreferences;

import android.util.Log;

import android.widget.Button;

import android.widget.TextView;

import android.view.MenuInflater;

import android.view.MenuItem;

import android.view.View;

import android.view.View.OnClickListener;

import com.android.future.usb.UsbAccessory;

import com.android.future.usb.UsbManager;

public class Veloz extends Activity {

private static final String tag =

Veloz.class.getSimpleName();

private PendingIntent mPermissionIntent;

private static final String ACTION_USB_PERMISSION =

"com.android.example.USB_PERMISSION";

private boolean mPermissionRequestPending;

private UsbManager mUsbManager;

private UsbAccessory mAccessory;

private ParcelFileDescriptor mFileDescriptor;

private FileInputStream mInputStream;

private FileOutputStream mOutputStream;

private static final byte perintah = 0x1;

private static final byte targetTerima = 0x2;

private static final byte comAtur = 0x3;

private static final byte tarAtur = 0x4;

private static final byte koma = 0x5;

(16)

public double waktux, var1, BDy, BMy, LDy, SDy, TDy, GRy,

visc, DB, CF;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

mUsbManager = UsbManager.getInstance(this);

mPermissionIntent = PendingIntent.getBroadcast(this,

0, new Intent(

ACTION_USB_PERMISSION), 0);

IntentFilter filter = new

IntentFilter(ACTION_USB_PERMISSION);

filter.addAction(UsbManager.ACTION_USB_ACCESSORY_DETACHED);

registerReceiver(mUsbReceiver, filter);

setContentView(R.layout.main);

SharedPreferences pengaturan =

PreferenceManager.getDefaultSharedPreferences(getBaseContext());

//ini bagian untuk setting variable

//bagian di preference yg uda dibuat dan dishare ke

mainActivity

String BDx = pengaturan.getString("BD", "0");

String BMx = pengaturan.getString("BM", "0");

String LDx = pengaturan.getString("LD", "0");

String SDx = pengaturan.getString("SD", "0");

String TDx = pengaturan.getString("TD", "0");

String GRx = pengaturan.getString("GRV", "0");

//konversi

BDy = Double.valueOf(BDx);

BMy = Double.valueOf(BMx);

LDy = Double.valueOf(LDx);

SDy = Double.valueOf(SDx);

TDy = Double.valueOf(TDx);

GRy = Double.valueOf(GRx);

(17)

DB = BMy/( (4.0 / 3.0 )*Math.PI*Math.pow(BDy/2.0, 3));

//variable tetap sebelum perhitungan viskositas

var1 = ( 2.0 / 9.0 )* GRy * Math.pow(BDy/2.0, 2)*(DB -

LDy)/SDy;

//untuk faktor koreksi

CF = 1.0 - (2.104 * (BDy/TDy)) + (2.09 *

(Math.pow(BDy/TDy, 3))) - (0.95 * (Math.pow(BDy/TDy, 5)));

//pengaturan teks yang muncul pada mainActivity

SenSD = (TextView)findViewById(R.id.SensSD);

SenSD.setText(String.valueOf(SDy));

vizcouz = (TextView)findViewById(R.id.viscText);

time = (TextView)findViewById(R.id.timeVal);

Button reset = (Button)findViewById(R.id.button1);

reset.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

time.setText("0");

vizcouz.setText("0");

byte[] buffer = new byte[3];

buffer[0] = comAtur;

buffer[1] = tarAtur;

buffer[2] = koma;

try{

mOutputStream.write(buffer);

}catch(IOException e){

Log.e(tag, "pesan tidak dikenal", e);

}

});

(18)

//cek broadcast data streaming yang masuk

private final BroadcastReceiver mUsbReceiver = new

BroadcastReceiver() {

@Override

public void onReceive(Context context, Intent intent) {

String action = intent.getAction();

if (ACTION_USB_PERMISSION.equals(action)) {

synchronized (this) {

//sinkron dan baca apa usb tersamsubung atau tidak

UsbAccessory accessory = UsbManager.getAccessory(intent);

if

(intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED,

false)) {

openAccessory(accessory);

} else {

Log.d(tag, "sambungan ditolak" + accessory);

}

mPermissionRequestPending = false;

}

} else if

(UsbManager.ACTION_USB_ACCESSORY_DETACHED.equals(action)) {

//jika sambungan Usb dicabut

UsbAccessory accessory = UsbManager.getAccessory(intent);

if (accessory != null && accessory.equals(mAccessory)) {

closeAccessory();

}

};

//ketika meresume aplikasi

@Override

public void onResume(){

super.onResume();

if (mInputStream != null && mOutputStream != null) {

return;

}

(19)

UsbAccessory accessory = (accessories == null ? null :

accessories[0]);

if (accessory != null) {

if (mUsbManager.hasPermission(accessory)) {

openAccessory(accessory);

} else {

synchronized (mUsbReceiver) {

if (!mPermissionRequestPending) {

mUsbManager.requestPermission(accessory, mPermissionIntent);

mPermissionRequestPending = true;

}

} else {

Log.d(tag, "android tak tersambung");

}

//ketika aplikasi dipause

@Override

public void onPause(){

super.onPause();

closeAccessory();

}

//ketika data streaming tidak ada

@Override

public void onDestroy(){

super.onDestroy();

unregisterReceiver(mUsbReceiver);

}

//untuk menutup aplikasi

private void closeAccessory() {

try{

if(mFileDescriptor != null){

mFileDescriptor.close();

(20)

}finally{

mFileDescriptor = null;

mAccessory = null;

}

//inisialisasi ketika USB di insert

private void openAccessory(UsbAccessory accessory) {

mFileDescriptor = mUsbManager.openAccessory(accessory);

if (mFileDescriptor != null){

mAccessory = accessory;

FileDescriptor fd = mFileDescriptor.getFileDescriptor();

mInputStream = new FileInputStream(fd);

mOutputStream = new FileOutputStream(fd);

Thread thread = new Thread(null, jalankan, tag);

thread.start();

Log.d(tag, "handphone tersambung");

}else{

Log.d(tag, "sambungan gagal");

}

//proses penerimaan data straming via USB

Runnable jalankan = new Runnable() {

@Override

public void run() {

int ret = 0;

final byte buffer[] = new byte[6];

while (ret >= 0){

try{

ret = mInputStream.read(buffer);

break;

}

(21)

case perintah:

if(buffer[1] == targetTerima){

final int waktu = ((buffer[2] & 0xFF) << 24)

+((buffer[3] & 0xFF) << 16)

+ ((buffer[4] & 0xFF) << 8)

+ (buffer[5] & 0xFF);

if (waktu > 0){

runOnUiThread(new Runnable() {

@Override

public void run() {

//perhitungan viskositas

time.setText(String.valueOf(waktu));

waktux = Double.valueOf(waktu);

//viskositas akhir

double x = var1 * waktux / 1000.0;

//hasil akhir dari perhitungan

vizcouz.setText(new

Log.d(tag, "no data found" + buffer[0]);

break;

}

};

//script untuk menu option

@Override

public boolean onCreateOptionsMenu(android.view.Menu menu) {

super.onCreateOptionsMenu(menu);

MenuInflater muncul = getMenuInflater();

muncul.inflate(R.menu.veloz, menu);

(22)

}

//script ketika item dari menu option dipilih

@Override

public boolean onOptionsItemSelected(MenuItem item) {

switch(item.getItemId()){

case R.id.aboutMe:

Intent a = new Intent("com.ajirdoank.velozity.ABOUT");

startActivity(a);

return true;

case R.id.setting:

Intent s = new Intent("com.ajirdoank.velozity.PREFS");

startActivity(s);

return true;

case R.id.instruct:

Intent i = new Intent("com.ajirdoank.velozity.INSTR");

startActivity(i);

return true;

case R.id.exit:

finish();

}

return false;

}

// the end of this application from @ajirdoank

}

2.2.2 Velozity/src/Prefs.java

package com.ajirdoank.velozity;

import android.os.Bundle;

import android.preference.PreferenceActivity;

public class Prefs extends PreferenceActivity{

@Override

(23)

super.onCreate(savedInstanceState);

addPreferencesFromResource(R.xml.preferences);

}

2.3 Untuk accessory_filter.xml

<usb-accessory manufacturer="ajirdoank" model="Vizcouz"

version="1.0" />

</resources>

2.4 Untuk preferences.xml

<PreferenceScreen

xmlns:android="http://schemas.android.com/apk/res/android" >

<EditTextPreference

android:title="Ball Diameters (m)"

android:key="BD"

android:inputType="numberDecimal"

android:summary="input Ball diameter">

</EditTextPreference>

<EditTextPreference

android:title="Ball Mass (kg)"

android:key="BM"

android:summary="input Ball Mass">

<EditTextPreference

android:title="Liquid Density (kg/m3)"

(24)

android:summary="input Liquid Density">

<EditTextPreference

android:title="Both Sensors Distance (m)"

android:key="SD"

android:summary="input what distance both of sensor

placed">

<EditTextPreference

android:title="Tube Diameters (m)"

android:key="TD"

android:summary="input Tube Diameters">

<EditTextPreference

android:title="Gravitation (m/s2)"

android:key="GRV"

android:summary="input Gravitation value">