# Notes

Hi Friends, In this article we would how to start with Arduino setup & a very basic program to Blink LED.  This article is for beginner who are IOT Enthusiastic.  Requirements: 1) Arduino board  2) 1 LED 3) Jumper wire   4) Resistor (200 OM) Diagram: Program:  void setup() {   // initialize digital pin 13 as an output.   pinMode(13, OUTPUT); } // the loop function runs over and over again forever void loop() {   digitalWrite(13, HIGH);   // turn the LED on (HIGH is the voltage level)   delay(1000);              // wait for a second   digitalWrite(13, LOW);    // turn the LED off by making the voltage LOW   delay(1000);              // wait for a second } Compile & upload program on your Arduino board. you should be able to see Blinking LED. Simulate here:   https://circuits.io/circuits/2655115-b...

*Puppet master will have auto sign policy, to enable that use following steps :- cd /etc/puppet/ vi autosign.conf [Add content: *] - It will allow all nodes by default. open up /etc/puppet/puppet.conf vi /etc/puppet/puppet.conf Add this section [master]     autosign = true   *On Agent, to connect it with puppet master, edit /etc/puppet/puppet.conf Add following line, under [main] section:- server=puppetmaster.rbidev.ds *Firewall should be disabled on both puppet amaster/ agent SERVER ======     1  rpm -ivh https://yum.puppetlabs.com/puppetlabs-release-el-6.noarch.rpm     2  yum install puppet-server     3  cat /etc/hosts     4  ping 192.168.33.11     5  vi /etc/hosts     6  ping puppetclient.rbidev.ds     7  vi /etc/hosts     8  ping puppetclient.rbidev.ds     9  cat /etc/puppet/puppet.conf    ...

This tool provides a Physical interface to click & start build on Teamcity. This is plug and play device. Checkout video here:  https://youtu.be/srnu6uvvWT0 Items required to build this tool :- 1 Arduino Uno Micro-controller board 1 USB Cable 2 LED 1 On-Off switch 1 Push button Building circuit  I used a online website to build my buffer circuit. Follow this link :- https://123d.circuits.io/circuits/1659445-teamcity-trigger Programming micro-controller  Programming micro-controller is extremely easy. It is programmed in C language using Arduino IDE. github url for project : https://github.com/luckgagan/OneclickDeploymentTool C code has to part 1st is Setup & 2nd is Loop. int InputPin = 13; void setup() {   // put your setup code here, to run once:   Serial.begin(9600);   analogReference(INTERNAL); } Setup code is initializing serial with baud 9600. This part executes once. another part is l...

Queries to rename database in SQL Server :- Step 1: Enable Single user mode on database  ALTER DATABASE database_name SET SINGLE_USER WITH ROLLBACK IMMEDIATE Step 2: Change database name  ALTER DATABASE database_name MODIFY NAME = New_database_name Step 3: enable multi user mode on database  ALTER DATABASE New_database_name SET MULTI_USER WITH ROLLBACK IMMEDIATE Its done :) 

Configuring git on ubuntu machine is extremely easy. First we would need to install git on the same machine. Step 1: Install git on the machine apt-get install -y git Step 2: In case git is already installed, check git settings git config --list Step 3: Update git config file git config --global user.email "luck.gagan@gmail.com" git config --global user.name "Gagan" Step 4:  Initialize a git repo mkdir GitSample cd GitSample git init Step 5: Add content to git repo for commit git add -A Step 6: Commit your changes git commit -m "First commit" Step 7: Add your repo to remote. (I have used github) git remote add origin https://github.com/luckgagan/gitsamplerepo.git Step 8: Push git push -u origin master ********************************You are done****************************