Menyadari bahwa practices make perfect, maka yang dibutuhkan adalah belajar dan latihan. Ebook dan tutorial onlinelah yang menjadi tempat belajar dan bertanya. Pak guru pernah mengatakan bahwa beliau punya buku tentang ini, namun tentu saja dalam bahasa jepang yang hanya bisa terbaca code pemrogramannya saja tanpa megetahui apa instruksi dari penulis mengenai maksud dari penulisan kode program tersebut. Oleh karena itu, saya lebih memilih untuk mencari literatur saya sendiri bermodal google dan beberapa site resource ebook yang memberikan layanan ebook downloadable.

Device sudah ditangan dan beberapa e-book juga sudah terdownload, selanjutnya adalah beristiqamah untuk mempraktekkan menulis kode-kode program dan juga menginstal sensor atau lamp yagn mendukung pemrograman menggunakn arduino ini. Blink program adalah semacam hello worldnya arduino yaitu dengan menyalakan lampu sebagai output dari kode program yang kita tulis.

Hello world
itulah kata yang biasa kita tulis apabila kita belajar bahasa pemrograman, untuk ardunio kita kan diminta membuat blink lamp. Berikut ini sedikit mengenai program blink untuk program arduino pertama saya:

//define LED 13   // menyatakan bahwa variabel LED menggunakan pin nomor 13
// dalam arduino ada 2 macam void, setup dan loop. Setup untuk persiapan sebelum loop dan Loop adalah perulangan yang dijalankan oleh sistem.
void setup ()  {
	pinMode(LED, OUTPUT);     	// mengatakan pada arduino bahwa LED adalah OP
}

void loop() {
	digitalWrite(LED, HIGH);	   // set variabel LED sebegai digital dan di berikan nilai HIGH
	delay(1000);   			// delay 1000ms atau 1 menit guna waktu penyalaan
	digitalWrite(LED, LOW);	// mematikan led dengan megeset variabel LED dengan LOW
	delay(1000);			// delay lagi untuk waktu matinya LED
}

setelah itu di verifikasi untuk memasikan tidak ada kode yang bermasalah serta melakukan kompilasi kode program menjadi biner. Jika proses kompilasi sudah selesai berikutnya di upload ke arduino. Hasilnya lampu pada pin 13 akan menyala dan berkedip bergantian selama 1 menit dan pada 1 menit.
Itulah program belajar arduino saya yang pertama, selanjutnya apabila ada yang menarik akan ditulis lagi supaya saya ingat dan juga sebagai catatan pembelajaran saya.

]]> http://andrew.getux.com/2012/02/17/finally-they-come.xhtml/feed 0 http://andrew.getux.com/2012/02/16/tier-of-knowledge.xhtml http://andrew.getux.com/2012/02/16/tier-of-knowledge.xhtml#comments Wed, 15 Feb 2012 16:04:36 +0000 andrew http://andrew.getux.com/?p=857 Winter 2012. Just receive feed from “Trust me I’m engineer” page on facebook, it give us schematic of tier knowledge, i don’t know it’s right or just joke anymore, but let’s thinking it deeply, which tier your knowledge does.

In my case, even though I study about Agriculture Informatics ( Agriculture + Information Technology), I asked to learn basic knowledge of agricultural engineering, because information and technology is just tools to facilitate agricultural system. However,agricultural engineering is also engineering, and the people studying engineering are engineer..hahaha..although my faculty in agriculture, but my laboratory is bio-production engineering. how about you ..:D

I have two android device for do research, both already rooted using above tips and running well. First device can easily to check the file system directory and do operation system ( upload, download, copy,paste, make directory), but the second device directory system still locked, although I can access it through adb shell. This is something that we can do to face this problem:

1. Connect phone with USB cable, and make sure our development mode > debugging mode is checked
2. Using  terminal/consol from pc we try to change permission, especially in file system
1. $ adb shell
2. $ su
3. # cat /proc/mounts

4. /dev/block/mmcblk0p1   /system ext3 ro,relatime,errors=continue,barrier=0,data=writeback 0 0
   /dev/block/mmcblk0p2 /cache ext3 rw,nosuid,nodev,relatime,errors=continue,barrier=0,data=writeback 0 0
   /dev/block/mmcblk0p3   /data ext3 rw,nosuid,nodev,relatime,errors=continue,barrier=0,data=writeback 0 0
   /dev/block/mmcblk0p4  /.secureext3 rw,nosuid,nodev,relatime,errors=continue,barrier=0,data=writeback 0 0

   We just need information about default mounting for data, from information above we can know that /data is originally from /dev/block/mmcblkop3. so we want to remount that dev and add permission to read and write

   # mount -o rw, remount -t yaffs2 /dev/block/mmcblkop3 /data# chmod 777 /data

5. Up to this step, we can access to directory /data and doing copy/download file from phone to computer
3. Using DDMS file explorer to copy/download

Implementation of Information and technology also improve in field of agriculture, not only engineering and science but also new technology including mobile and cloud computing. Briefly introduced by laboratory Bioproduction Engienering, Simple field monitoring system (FMS) for online data logger, monitor temperature, soil moisture content, co2, solar radiation and electrical conductivity (EC). Fms already exist and working almost 2 years with improvement modular, one of part needed to improve fms is actuating system.

Actuating system is a part of general agricultural monitoring system that handling actuator, based on data acquisition and decision. Actuating system commonly handled by operator or regular scheduling ( both mechanical switch and electrial switch). We consider cheap device which easy to program, update, maintain , and use. First of all we consider iOs for development mobile application for controlling and actuating system, after consider terms and policies we will use opensource software, Android for mobile application. There are several benefit of development Application using android:

1. Opensource software
2. Community support
3. Online documentation and case studies
4. Cheapest than others

The application will work as main controller and automatic pump triggering in order to intelligent control of irrigation, that’s the relation between android and agricultural engineering.

Can you imagine that my first class start at 8:30 in the morning, perhaps it’s no problem if it’s in indonesia, we often go to campus at 7:00 in the morning, no big deal bro..but in here, it’s really difficult to wake up early and sleep early. I don’t know why? indonesian time is still perched on me, different 2 hours early than in indonesia. although winter happen, not only cold but also snow in fukuoka, but it’s not so much as in honsu island. we are in fukuoka just felt the cold and dirty clothes.

something that i will say is enjoy the process, we don’t know what happen in the future, event hough it’s hard and  heavy i beliefe i will miss this moment, some day ..

My research title is design of an early warning system for landslide in agricultural land use, using gradient hydraulic for indicator and web technology including grid wireless sensor network. This research is providing research group called ews-group, the researcher are consist of 7 undergraduate student and 2 master student, including me as field coordinator. this research will held in laboratory of energy and agricultural machinery, start at May until October. The research can be divide as soil mechanic groups, wireless sensor network groups, erosion and landslide groups, ict-infrastructure groups. Implementation of this research supported by Competitive Grant 2011 and hopefully all of us can give the best and able to catch the aim of research in schedule.

This is step by step DNS installation on my Mac

1. Firstly, this is my machine specification:

Model Name : MacBook
Model Identifier: MacBook5,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 3 MB
Memory: 2 GB

2. Rndc configuration, rndc is built in utility in mac to help us, creating dns and Dns Configuration files, this is command listing

whitebox:~ macbook$ sudo -s
Password:
bash-3.2# rndc-confgen -b 256 > /etc/rndc.conf
bash-3.2# head -n5 /etc/rndc.conf | tail -n4 > /etc/rndc.key

3. Make sure that port running on rndc dan named.conf is same, this is command to check both files

bash-3.2# more /etc/named.conf | grep 'inet.*\?port'
inet 127.0.0.1 port 54 allow {any;}
bash-3.2# more /etc/rndc.conf | grep '\-port'
default-port 953;

Default port of rndc.conf is 953, we must change the default port as the named.conf port, in my case i using #54 (port 54) in rndc.conf files.

4. Enable the Bind Services, we will make launcher in mac os, after booting this services will loaded automatically. we can execute the following command as bellow:

# launchctl load –w /System/Library/LaunchDaemons/org.isc.named.plist
# echo "launchctl start org.isc.named" >> /etc/launchd.conf

if our system is baefore 10.5, we must add this following command to enable sevices dns

# echo "DNSSERVER=-YES-" >> /etc/hostconfig

we can direct execute the application using this command:

# launchctl start org.isc.named

5. Named Configuration
Actually the Mac os is has already been installed Bind and rndc as default dns application, so the above instruction just enabling the services and create our configuration. Firstly we create zone files (primary zone and reverse zone) and the second is added entries in named.conf. In this example I create domain name wonogiri.edu, and this is the zone configuration files:

$TTL    86400
$ORIGIN wonogiri.edu.
@ 1D IN SOA  wonogiri.edu  info.wonogiri.edu (
20110327        ; serial
3H              ; refresh
15M             ; retry
1W              ; expiry
1D )            ; minimum

1D IN NS        @
1D IN A         172.16.10.99
wonogiri.edu            IN NS           ns.wonogiri.edu.
www                     IN      A       172.16.10.99
ns                      IN      A       172.16.10.99
akademik                CNAME           www

and this is the reverse files

$TTL    86400
$ORIGIN wonogiri.edu.
@  1D IN SOA  wonogiri.edu @ info.wonogiri.edu (
20110327        ; serial
3H              ; refresh
15M             ; retry
1W              ; expiry
1D )            ; minimum

1D IN NS        @
1D IN A         127.0.0.1
22                              IN PTR          wonogiri.edu.
99.10.16.172.in-addr.arpa       IN PTR          wonogiri.edu.

this is entries in /etc/named.conf, i usually using vim for my default editor :hammer:

zone "wonogiri.edu" IN {
type master;
file "wonogiri.zone";
allow-update {none;};
};

zone "rev.wonogiri.edu" IN {
type master;
file "rev.wonogiri.zone";
allow-update {none;};
};

after finish the configuration, we must reload our rndc services to make sure the dns running well with new configuration.

# rndc reload

6. the last step is setting up our name server, in this case mac os is so difficult to set up the nameserver in console mode, we must using our GUI, yeah..most geek people is prefer to use command line rather than gui

# ifconfig en0 172.16.10.99
# echo “nameserver 172.16.10.99” > /etc/resolv.conf

7. Tesing our buddy dns, using dig and nslookup..
this is my result ..not too bad

http://upload.ugm.ac.id/606andrew-web.pdf

Hmm….I am trying to login with superuser account, i just add in url like faculty.ac.id/user and sign in to drupal administration pages. with superuser(admin) account i can view the frontpage and the site is working properly and then I check the user permission (/admin/user/access) and there is nothing wrong in this site permission configuration. Ok, I sign out from administration pages to check again the frontpage. and the access denied message is still appear in frontpage.

Next method to find some information about something that we don’t know is google, we familiar call it googling. I asking to google and find this articles. The article tell us the same story about the access denied in drupal, we just do the “rebuilding permission” this method suggest us to make change configurtion under the url:

Administer > Content Management > Post Settings

You can change configuration as you like, it’s just action to rebuild the permission, i try to change the number of post that showing in frontpage. and then save the configuration. Taadaa..yeap, the frontpage is managed successfully.

I made this notes just for my personal diary, hopefully it also useful for other. This is the step by step OJS installation in hosting UGM. I assume that the administrator that install this OJS has one account in hosting UGM and familiar using networking tools (web browser, ftp manager, cpanel )

1. Download the latest OJS from official website of Public Knowledge Project (PKP) here. The latest version at this written is 2.3.3-3. after the download complete, extract the *.tar.gz OJS in our local folder.

2. Login to cpanel hosting using FTP(filezilla, WSFTP, MidnigtCommander or etc.) manager to transfer the extracted files into remote location. copy all or files under ojs.2.3.*/* to /home/name-user/public_html/

3. Make sure that all files copied onto remote location completely, you can check from the browser and look at the page installation like below.

4. Next step, we must prepare the system requirement at listed in installation pages as above, for this installation I made the database first and then adjust the database configuration. To make database, you can login with cpanel account and go ahead to database setting manager, create the database, mysql user and add  all privilege to user created. Remember this information and it will be used to OJS installation.

5. Read carefully at the installation page, make sure that the system requirement are met listed in pre-installation section, write down the Admin information (administrator name, password and email) and database setting (database name, database user, database password). Dont forget to create folder to upload file, you can located in /home/jifnp/public_html/files

6. Click the Install button to finish the installation progress, make sure that there are no error and missing file or directories, if successful installation, you will get first page like below.

7. Installation done, the next step is entry data and article related to journal concern

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