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

38

LAMPIRAN 1
Tampilan Alat

Gambar 1. Sistem Sensor didalam Kotak Hitam

Gambar 2. LASER

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Gambar 3. Tabung Volumetri dan Bola Besi didalam Sampel

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LAMPIRAN 2
Tampilan aplikasi pada Android

Gambar 1. Tampilan awal
aplikasi

Gambar 2. Tampilan menu

Gambar 3. Tampilan menu
setting

Gambar 4. Tampilan edit
jarak sensor

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Gambar 5. Tampilan setelah
jarak sensor diatur

Gambar 6. Perhitungan

viskositas gliserin

Gambar 7. Perhitungan
viskositas Oli Shell Advance

Gambar 8. Perhitungan
viskositas Minyak Goreng

LAMPIRAN 3

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1

Program Untuk Modul Arduino
#include
#include
//jenis paket yang akan dikirim

#define perintah 0x1
#define targetTerima 0x2
#define comAtur 0x3
#define tarAtur 0x4
#define koma 0x5
AndroidAccessory acc("ajirdoank",
"Vizcouz",
"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;
boolean valLdr2Picu;

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float ubah1 = 0;
float ubah2 = 0;
int waktuMulai = 0;
int val;
void setup()
{
reset();
Serial.begin(9600);
acc.powerOn();

msg[0] = perintah;
msg[1] = targetTerima;
}
void reset()
{
valLdr1 = 0;
valAkhirLdr1 = 0;
valLdr1Kirim = 0;
valLdr1Picu = false;
valLdr2 = 0;
valAkhirLdr2 = 0;
valLdr2Kirim = 0;
valLdr2Picu = false;
waktuMulai = 0;
val = 0;
kirimData();
}
void cekLdr1()
{
if(valLdr1Picu)

{
return;
}

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//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)
{
//Serial.print(" | ubah1 = ");
//Serial.print(ubah1);
//mulai picu ldr1 dan mulai waktu timer;
valLdr1Picu = true;
waktuMulai = millis();
}
}
//nilai ldr1 yg sekarang dikembalikan dengan nilai ldr1 yg
terbaca;
valAkhirLdr1 = valLdr1;
}
void cekLdr2()
{

if(valLdr2Picu)
{
return;

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}
//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);
valAkhirLdr2 = 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)
{
valLdr2Picu = true;
//Serial.print(" | ubah2 = ");
//Serial.print(ubah2);
//Serial.print(" | ");
//Serial.print("waktu = ");
val = millis() - waktuMulai;
kirimData();
//Serial.print(val);
}
}

valAkhirLdr2 = valLdr2;
}
void kirimData(){
if (acc.isConnected()){
msg[0] = perintah;
msg[1] = targetTerima;

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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
2.1

Program Untuk Aplikasi Android
Untuk Tampilan Aplikasi dan menu pilihan

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2.1.1 main.xml






















2.1.2 veloz.xml

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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;
import android.app.Activity;

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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;
public TextView SenSD, time, vizcouz;

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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);
//massa jenis bola atau Density of Ball

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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);
}
}
});

}

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//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;
}
UsbAccessory[] accessories = mUsbManager.getAccessoryList();

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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() {
// TODO Auto-generated method stub
try{
if(mFileDescriptor != null){
mFileDescriptor.close();
}

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}catch(IOException e){
}finally{
mFileDescriptor = null;
mAccessory = null;
}
}
//inisialisasi ketika USB di insert
private void openAccessory(UsbAccessory accessory) {
// TODO Auto-generated method stub
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() {
// TODO Auto-generated method stub
int ret = 0;
final byte buffer[] = new byte[6];
while (ret >= 0){
try{
ret = mInputStream.read(buffer);
}catch(IOException e){
break;
}
switch(buffer[0]){

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case perintah:
if(buffer[1] == targetTerima){
final int waktu = ((buffer[2] & 0xFF)