Arduino : Sending Data from ESP8266 to thingSpeak

Setting of ThingSpeak

1.       Create account in Think speak. And complete the validation

https://thingspeak.com/

2.       Create a new Channel in thingSpeak.

Then click on save channel. By default it will show the empty chart as like below.

Arduino : Connecting speaker

Simple application to check that the Speaker is connected to the  Arduino or not and how it will produce sound.

Required Items.

1. Speakar

2. Arduino

3. 5V

Follow the below code and upload into arduino for speaker connection

void setup() {   } void loop() {   tone(8,33, 500);   delay(2000);    tone(8,37, 500);    delay(2000);    tone(8,41, 500);    delay(2000); }

Circuit for Arduino Connecting speaker 

for more info you can see the below link. for creating melody Arduino Connecting speaker 

https://maker.pro/arduino/projects/arduino-speaker

Arduino : Blinking LED

Simple and first program of Arduino  for blinking of LED. [ This program is look like "Hello World"  for arduino.

Required Items.

1. LED

2. Arduino

3. 5V

Program for blinking of LED in Arduino.

Issues on Python configurations

Register the python in environment variable if Python command in Giving error in your terminal.

To see the Environment variable in command Terminals as

Echo %path%

To set the environment variable in the terminal.

setx path "%path%;C:\Python27;"

If above one will not work then set environment using the below path.

Control Panel à View Advance System setting à Go to Advance Tab à Envinoment Variable à Edit

Chat bot in Python using Chatterbot

Here is the sample code demonstration for how to create simple chatbot using chatterbot  in python.

Chatbot will answer the question based on training data that you have provided.

Machine Learning - Data Processing

Chapter 2  - Data Processing: It is crucial part of machine learning.

1.       Dataset : Get the dataset that we will use for pre-processing. Suppose you have the dataset like below.

It is in data.csv

In machine learning model we need to check that the Dependent Variable and Independent variable.

In Below example there first three colum are independent variable and Purchased colum is dependent variable

Name	Age	Salary	Purchased
Bon	44	72000	No
Ram	27	48000	Yes
Sohan	30	54000	No
eric	38	61000	No
Mat	40		Yes
Denie	35	58000	Yes
Andie		52000	No
Rus	48	79000	Yes
Mak	50	83000	No
Mark	37	67000	Yes

Python Lab - Day 3

Python Labs : 3^rd    Day

1.       User defined Exception

2.       Machine Learning Beginning

3.       File Demo

4.       Database Connection with Sqlite in Python

5.       Pickle  demo

Lab 1

User defined Exception

bb = 60 class C(Exception) :     pass

Python Lab - Day 2

Python Labs  2^nd   Day

1. Class Demo in Python
2. Constructor and Destructors in Python
3. Data Hiding in Class in Python
4. Inheritance in Python
5. Self Keyword in python
6. Exception Handling in Python
7. Documentation functions
8. Consume User Module in Python
9. OS import module demo in python Lab
10. Time and calendar import demo in python

Python Lab - Day 1

Python Labs  : 1^st Day

1. Print Hello World
2. Variables in Python
3. Arithmetic Operation in Python
4. Conditional Statement in Python
5. Loops in Python. While, for
6. Jumping Statement in python
7. Datastructure in python,  python contains four  types of collection datatype  List, Tuple, Dictionary , set
8. Formatting the String  function for print
9. Function demo in Python
10. Implementing inbuilt function of python
11. Importing math functions in python

Angular 4 Tutorial - Day 4

Day 1
Day 2
Day 3
Day 4

Today it will cover as form handling in angular.

1.       Template based approach – ngModel

2.       Model driven approach – form builder

Create new services as enquiry service.

Angular 4 Tutorial - Day 3

Day 1
Day 2
Day 3
Day 4

Services in AngularJs (lab)

a.      Add Service from CLI

Creating the services in angulajs.

Angular 4 Tutorial - Day 2

Day 1
Day 2
Day 3
Day 4

Send Data from Parent to child (Lab 4)

Making the child relation and Parent relation and passing the data from Parent to child.
That can be possible by defining @Input directive in the Child Component.

Suppose you have some value in Parent component and that you need to pass to the child component as like below.

Angular 4 Tutorial - Day 1

Day 1
Day 2
Day 3
Day 4

Prerequisite of angular Framework

History of angular

Angular Features

Node Configurations (Lab 1)

File Structure of Angular

First Application (Lab 2)

Create Child Component (Lab 3)

Angular Directives

Directive Code practice (Lab 3)

Prerequisite of angular Framework

HTML

CSS

NodeJs

Typescript

 History of angular

Angular 1.x

Angular 2 -- Angular

Angular 3 - routing -- 3.x

Angular 4,5,6

OAuth Integration with MVC WebApi

What is OAuth

oAuth stands for Open Authorization. It helps to access the resource in secured way , when the resource owner want it to share to any third party provider.

Like you logged in to the twitter and now you want to send a friend request to all your google address book user. So you can login securely to the google and than google will authenticate and share the entire address book to twitter and that you can use to send the friend request.

How it Work

User has logged into as is user credential  into seeker Resource (SR) now he want to get the details from third party resource(RO)  where he already have account. He has to provide the credentials than third party resource owner (RO) will allocate the security token. Then Seeker Resource (SR) will send the Security token to the resource Owner(RO), and it will give the details of resource what Seeker Resource want.

Add a startup.cs class to your application

Startup page is mostly using to configuration for startup of the application when you are configuration OWIN or the OAuth authorization.

There are two what you can directly add it and  as a class file and decorate it as. OWinStartup:

[assembly: OwinStartup(typeof(WebApiOAuth_1.App_Start.Startup))]

Or you can create startup.cs through the Visual Video by using the below process.

a.       Rt click on App_Start à Add à Class

XMLformatting in c#

Format the minify XML into readable way which help to view it properly and easy to read in C#. You can make your simple xml formatter by using the below few lines of code in C#.

static void Main(string[] args)         {             try             {                 string xml = @"<?xml version='1.0' encoding='UTF - 8' ?><employees><employee><id>1</id><firstName>Leonardo</firstName>             <lastName>DiCaprio</lastName><photo>https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgr5EO4zbh_Vl_1W3Pxwo9ty6C7GZuDhME8KIVAXi0-PmFL-jRxzLS_mHhWjSwZARP2Uzq-ci7TvJR_3YO056bYOf1PBV7zS2TeNv8gYyt54xH8toD7vZu0kMKSVIijC4QEZy5rB0I8ujA/s200/Leonardo+Dicaprio7.jpg</photo>             </employee><employee><id>2</id><firstName>Johnny</firstName><lastName>Depp</lastName>             <photo>http://4.bp.blogspot.com/_xR71w9-qx9E/SrAz--pu0MI/AAAAAAAAC38/2ZP28rVEFKc/s200/johnny-depp-pirates.jpg</photo>             </employee><employee><id>3</id><firstName>Hritik</firstName><lastName>Roshan</lastName><photo>http://thewallmachine.com/files/1411921557.jpg</photo>             </employee></employees> ";

Could not load file or assembly 'Newtonsoft.Json, Version=10.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed'

Could not load file or assembly 'Newtonsoft.Json, Version=10.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Binding DropDownList in MVC

In MVC we have 2 ways to bind the dropdown is strongly type and nomal way.

There are various ways that you can bind the dropdownlist in MVC.

1.       Binding Dropdownlist  using the view bag in MVC

Binding SelectedList to Dropdown

List<SelectListItem> items = new List<SelectListItem>();             items.Add(new SelectListItem() { Text = "Male", Value = "Male", Selected = false });             items.Add(new SelectListItem() { Text = "Female", Value = "Female", Selected = true });             SelectList selectList = new SelectList(items, "Value", "Text");             ViewBag.Gender = selectList;

Binding it in HTML, like below

@Html.DropDownList("Gender", ViewBag.Gender as SelectList)

Will get output as below.

Format date in ui-grid cellTemplate

This sample is using when you are implementing MVC with Angular 1.x and Angular Ui Grid.

Formatting of date field will be appearing like:

Handling Exception in Global.asax in MVC

Instead of writing the try and catch throughout the application, global.asax , application_error method is the common place to handle all the error and based on the type of exception it will redirect to the page.

Selecting the active link in MVC

Based on selection or opening of the controller action the link will select in MVC like below.

There should you need to provide the css dynamically which is based on the action. You need to create the CSS style.

.activelink {

    color: #ffffff;

    background-color: #de0301;

    border-radius: 10px;

    margin-left: 4px;

}

If you see the below code there we are checking the (ViewContext.RouteData.Values["Controller"].ToString() == "Home"

Provide security to Your WebApi using HttpMessageHandler

Using of HttpMessageHandler, help you to secure your WebApi action method, Even though it’s not the full proof security. But it is good to provide security based on tokens.

Step 1: Create A Web API project.

Follow below:

Step 2: Add a class file and giving the name as:

That You can give as any name

simple jquery popup example code

Simple jquery popup which generally use to show or to perform some operations as supplementary operations.

You will get the popup as like below.

This popup doesn’t need any plugin, you only need to take the reference of the

cordova "no java files found that extend cordovaactivity"

Getting Error as:

Severity Code Description Project File Line Suppression State Error No Java files found which extend CordovaActivity. OilFreeRecipes 1

This issue is causing due to missing of MainActivity.Java File Generally it is residing on the below path.

[Application Name]\platforms\android\src\com

Here it should have the folder name based on the namespace you have given. Suppose I have given namespace as com.passion.oilfreerecipes So there should have folder passion --> OilfreeRecipes