Learn Serverless by Building your own Slack App

Originally published by Lekha Surasani at freecodecamp.org

In this article, we'll learn what it is and why you should use it. We'll also set up AWS, create our serverless app, and create a slack app!

What is Serverless?

Serverless is a cloud computing paradigm in which the developer no longer has to worry about maintaining a server – they just focus on the code.

Cloud providers, such as AWS or Azure, are now responsible for executing code and maintaining servers by dynamically allocating their resources. A variety of events can trigger code execution, including cron jobs, http requests, or database events.

The code that developers send to the cloud is usually just a function so, many times, serverless architecture is implemented using Functions-as-a-Service, or FaaS. The major cloud providers provide frameworks for FaaS, such as AWS Lambda and Azure Functions.

Why Serverless?

Not only does serverless allow developers to just focus on code, but it has many other benefits as well.

Since cloud providers are now responsible for executing code and dynamically allocate resources based on event triggers, you typically only pay per request, or when your code is being executed.

Additionally, since cloud providers are handling your servers, you don't have to worry about scaling up – the cloud provider will handle it. This makes serverless apps lower cost, easier to maintain, and easier to scale.

Setting up AWS Lambda

For this tutorial, I will be using AWS Lambda, so first, we'll create an AWS account. I find AWS's UI hard to understand and difficult to navigate, so I will be adding screenshots for each step.

Once you log in, you should see this:

Next, we'll set up an IAM user. An IAM (Identity and Access Management) user interacts with AWS and its resources on your behalf. This allows you to create different IAM users with different permissions and purposes, without compromising the security of your root user account.

Click on the "services" tab at the top of the page, and type "IAM" into the bar:

Click on the first result, and you'll see, on the left-hand sidebar, that you're at the dashboard. Click on the "Users" option to get to create our new IAM user.

Click on the "Add user" button to create a new user. Fill in the details as follows:

You can name your user anything you'd like, but I went with serverless-admin. Be sure that your user has "Programmatic access" to AWS, not "AWS Management Console Access". You'd use the latter for teammates, or other humans who need access to AWS. We just need this user to interact with AWS Lambda, so we can just give them programmatic access.

For permissions, I've chosen to attach existing policies since I don't have any groups, and I don't have any existing users that I want to copy permissions for. In this example, I will create the user with Administrator access since it's just for a personal project; however, if you were to use a serverless app in an actual production environment, your IAM user should be scoped to only access Lambda-necessary parts of AWS. (Instructions can be found here).

I didn't add any tags and created the user. It's vital to save the information given to you on the next screen - the Access ID and Secret Access Key.

Don't leave this screen without copying down both! You won't be able to see the Secret access key again after this screen.

Finally, we'll add these credentials to command line AWS. Use this guide to get aws cli setup.

Make sure you have it installed by running aws --version. You should see something like this:

Then run aws configure and fill in the prompts:

I have the default region as us-east-2 already set up, but you can use this to determine what your region is.

To make sure that you have your credentials set up correctly, you can run cat ~/.aws/credentials in your terminal.

If you want to configure a profile other than your default, you can run the command as follows: aws configure --profile [profile name].

If you had trouble following the steps, you can also check out AWS's documentation.

Set up serverless

Go to your terminal and install the serverless package globally using npm: npm i -g serverless. (More info on serverless here)

and your terminal should look something like this:

Next, navigate to the directory where you want to create the app, then run serverlessand follow the prompts:

For this application, we'll be using Node.js. You can name your app anything you want, but I've called mine exampleSlackApp.

Open your favorite code editor to the contents in exampleSlackApp (or whatever you've called your application).

First, we'll take a look at serverless.yml. You'll see there's a lot of commented code here describing the different options you can use in the file. Definitely give it a read, but I've deleted it down to just:

service: exampleslackapp
 
provider:
  name: aws
  runtime: nodejs10.x
  region: us-east-2
 
functions:
  hello:
    handler: handler.hello

serverless.yml

I've included region since the default is us-east-1 but my aws profile is configured for us-east-2.

Let's deploy what we already have by running serverless deploy in the directory of the app that serverless just created for us. The output should look something like this:

And if you run serverless invoke -f hello in your terminal, it'll run the app, and you should see:

{ "statusCode": 200, "body": "{\n \"message\": \"Go Serverless v1.0! Your function executed successfully!\",\n \"input\": {}\n}" }

For further proof that our slack app is live, you can head back to AWS console. Go to the services dropdown, search for "Lambda", and click on the first option ("Run code without thinking about servers").

And here's your app!

Next, we'll explore actually using serverless by building our slack app. Our slack app will post a random Ron Swanson quote to slack using a slash command like this:

The following steps don't necessarily have to be done in the order that I've done them, so if you want to skip around, feel free!

Adding the API to our code

I'm using this API to generate Ron Swanson quotes since the docs are fairly simple (and of course, it's free). To see how requests are make and what gets returned, you can just put this URL in your browser:

https://ron-swanson-quotes.herokuapp.com/v2/quotes

You should see something like this:

So, we can take our initial function and modify it as such:

module.exports.hello = (event) => {
  getRon();
};

Note: I've removed the async portion

and getRon looks like:

function getRon() {
  request('https://ron-swanson-quotes.herokuapp.com/v2/quotes', function (err, resp, body) {
    console.log('error:', err)
    console.log('statusCode:', resp && resp.statusCode)
    console.log('body', body)
  })
}

Now, let's check if it works. To test this code locally, in your terminal: serverless invoke local -f hello. Your output should look something like:

Spoiler: There was a wrong way to consume alcohol

serverless invoke -f hello would run the code that you've deployed, as we saw in previous sections. serverless invoke local -f hello, however, runs your local code, so it's useful for testing. Go ahead and deploy using serverless deploy!

Create your Slack App

To create your slack app, follow this link. It'll make you sign into a slack workspace first, so be sure you're a part of one that you can add this app to. I've created a testing one for my purposes. You'll be prompted with this modal. You can fill in whatever you want, but here's what I have as an example:

From there, you'll be taken to the homepage for your app. You should definitely explore these pages and the options. For example, I've added the following customization to my app:

Display information can be found from the "Basic Information" tab on the app

Next, we need to add some permissions to the app:

To get an OAuth Access Token, you have to add some scope and permissions, which you can do by scrolling down:

I've added "Modify your public channels" so that the bot could write to a channel, "Send messages as Ron Swanson" so when the message gets posted, it looks like a user called Ron Swanson is posting the message, and slash commands so the user can "request" a quote as shown in the screenshot at the beginning of the article. After you save the changes, you should be able to scroll back up to OAuths & Permissions to see:

Click the button to Install App to Workspace, and you'll have an OAuth Access Token! We'll come back to this in a second, so either copy it down or remember it's in this spot.

Connect Code and Slack App

In AWS Lambda, find your slack app function. Your Function Code section should show our updated code with the call to our Ron Swanson API (if it does not, go back to your terminal and run serverless deploy).

Scroll below that to the section that says "Environment Variables", and put your Slack OAuth Access Token here (you can name the key whatever you'd like):

Let's go back to our code and add Slack into our function. At the top of our file, we can declare a const with our new OAuth Token:

const SLACK_OAUTH_TOKEN = process.env.OAUTH_TOKEN.

process.env just grabs our environment variables (additional reading). Next, let's take a look at the Slack API to figure out how to post a message to a channel.

The two pictures above I've taken from the API are the most relevant to us. So, to make this API request, I'll use request by passing in an object called options:

let options = {
    url: 'https://slack.com/api/chat.postMessage',
    headers: {
      'Accept': 'application/json',
    },
    method: 'POST',
    form: {
      token: SLACK_OAUTH_TOKEN,
      channel: 'general', // hard coding for now
      text: 'I am here',
    }
  }

and we can make the request:

request(options, function(err, resp, body) {
    console.log('error:', err)
    console.log('statusCode:', resp && resp.statusCode)
    console.log('body', body)
  })

Finally, I'll wrap the whole thing in a function:

function postRon(quote) {
  let options = {
    url: 'https://slack.com/api/chat.postMessage',
    headers: {
      'Accept': 'application/json',
    },
    method: 'POST',
    form: {
      token: SLACK_OAUTH_TOKEN,
      channel: 'general',
      text: quote,
    }
  }
 
  request(options, function(err, resp, body) {
    console.log('error:', err)
    console.log('statusCode:', resp && resp.statusCode)
    console.log('body', body)
  })
}

and we can call it from getRon like this:

function getRon() {
  request('https://ron-swanson-quotes.herokuapp.com/v2/quotes', function (err, resp, body) {
    console.log('error:', err)
    console.log('statusCode:', resp && resp.statusCode)
    console.log('body', body)
    postRon(body.substring(2, body.length - 2)) // here for parsing, remove if you want to see how/why I did it
  })
}

So our code should all in all look like this:

'use strict';
let request = require('request');
 
const SLACK_OAUTH_TOKEN = process.env.OAUTH_TOKEN
 
module.exports.hello = (event) => {
  getRon();
};
 
function getRon() {
  request('https://ron-swanson-quotes.herokuapp.com/v2/quotes', function (err, resp, body) {
    console.log('error:', err)
    console.log('statusCode:', resp && resp.statusCode)
    console.log('body', body)
    postRon(body.substring(2, body.length - 2))
  })
}
 
function postRon(quote) {
  let options = {
    url: 'https://slack.com/api/chat.postMessage',
    headers: {
      'Accept': 'application/json',
    },
    method: 'POST',
    form: {
      token: SLACK_OAUTH_TOKEN,
      channel: 'general',
      text: quote,
    }
  }
 
  request(options, function(err, resp, body) {
    console.log('error:', err)
    console.log('statusCode:', resp && resp.statusCode)
    console.log('body', body)
  })
}

Now let's test! Unfortunately, our environment variable in AWS Lambda isn't available to us when we run serverless invoke local -f hello. There are a few ways you can approach this, but for our purposes, you can just replace the value for SLACK_OAUTH_TOKEN with your actual OAuth Token (make sure it's a string). But be sure you switch it back before you push it up to version control!

Run serverless invoke local -f hello, and hopefully you should see a message like this in your #general channel:

Please note that I put down my channel name as 'general' since it's my test workspace; however, if you're in an actual workspace, you should create a separate channel for testing apps, and put the message there instead while you're testing.

And in your terminal, you should see something like:

If that works, go ahead and deploy it using serverless deploy. If it does not, the best way to debug this is to adjust code and run serverless invoke local -f hello.

Adding slash command

The last and final part is adding a slash command! Go back to your function's home page in AWS Lambda and look for the button that says "Add trigger":

We're going to add an API Gateway (as I already have).

Click on the button to get to the "Add trigger" page, and select "API Gateway" from the list:

I've filled in the information based on defaults mostly:

I've also left this API open for use – however, if you're using this in production, you should discuss what standard protocol would be with your team. "Add" the API, and you should receive an API endpoint. Hold on to this, because we'll need it for the next step.

Let's switch back over to our slack app and add a slash command:

Click on "Create New Command" and it should pop up with a new window to create a command. Here's how I filled mine out:

You can enter anything you want for "command" and "short description" but for "request URL", you should put your API endpoint.

Finally, we'll go back to our code to make some final adjustments. If you try to use the slash command, you should receive some kind of error back – this is because slack expects a response and AWS expects you to give a response when the endpoint is hit. So, we'll change our function to allow a callback (for reference):

module.exports.hello = (event,context,callback) => {
  getRon(callback);
};

and then we'll change getRon to do something with the callback:

function getRon(callback) {
  request('https://ron-swanson-quotes.herokuapp.com/v2/quotes', function (err, resp, body) {
    console.log('error:', err)
    console.log('statusCode:', resp && resp.statusCode)
    console.log('body', body)
    callback(null, SUCCESS_RESPONSE)
    postRon(body.substring(2, body.length - 2))
  })
}

where SUCCESS_RESPONSE is at the top of the file:

const SUCCESS_RESPONSE = {
  statusCode: 200,
  body: null
}

You can put the callback here or in postRon – it just depends on what your purposes are with the callback.

Our code at this point now looks something like:

'use strict';
let request = require('request');
 
const SLACK_OAUTH_TOKEN = OAUTH_TOKEN
 
const SUCCESS_RESPONSE = {
  statusCode: 200,
  body: null
}
 
module.exports.hello = (event,context,callback) => {
  getRon(callback);
};
 
function getRon(callback) {
  request('https://ron-swanson-quotes.herokuapp.com/v2/quotes', function (err, resp, body) {
    console.log('error:', err)
    console.log('statusCode:', resp && resp.statusCode)
    console.log('body', body)
    callback(null, SUCCESS_RESPONSE)
    postRon(body.substring(2, body.length - 2))
  })
}
 
function postRon(quote) {
  let options = {
    url: 'https://slack.com/api/chat.postMessage',
    headers: {
      'Accept': 'application/json',
    },
    method: 'POST',
    form: {
      token: SLACK_OAUTH_TOKEN,
      channel: 'general',
      text: quote,
    }
  }
 
  request(options, function(err, resp, body) {
    console.log('error:', err)
    console.log('statusCode:', resp && resp.statusCode)
    console.log('body', body)
  })
}

You should be able to use the /ron command in slack now and get a Ron Swanson quote back. If you don't, you can use Cloudwatch logs to see what went wrong:

The way our code works now, we've hardcoded in the channel name. But, what we actually want is for the quote to get posted in the message where you used /ron.

So, we can now use the event portion of our function.

module.exports.hello = (event,context,callback) => {
  console.log(event)
  getRon(callback);
};

Use /ron to run the function, and then check your Cloudwatch logs to see what gets logged to the console (you may need to refresh). Check on the most recent logs and you should see something like this:

The first item in this list (where it says "resource", "path", etc.) is the event, so if you expand that, you'll see a long list of things, but what we're looking for is 'body' all the way down at the bottom:

where's waldo: spot the param edition

Body is a string with some relevant information in it, one of them being "channel_id". We can use channel_id (or channel_name) and pass it into the function that creates our slack message. For your convenience, I've already parsed this string: event.body.split("&")[3].split("=")[1] should give you the channel_id. I hardcoded in which entry (3) the channel_id was for simplicity.

Now, we can alter our code to save that string as a variable:

let channel = 'general' (as our fallback)

module.exports.hello = (event,context,callback) => {
  console.log(event)
  channel = event.body.split("&")[3].split("=")[1]
  console.log(context)
  getGoat(callback);
};

and in postRon:

let options = {
    url: 'https://slack.com/api/chat.postMessage',
    headers: {
      'Accept': 'application/json',
    },
    method: 'POST',
    form: {
      token: SLACK_OAUTH_TOKEN,
      channel: channel,
      text: quote,
    }
  }

options var in postRon

Finally, if you use a slack command in any channel in your workspace, you should be able to see a Ron Swanson quote pop up! If not, as I mentioned before, the most common tools I use to debug serverless apps are serverless invoke local -f <function name>and Cloudwatch logs.

Hopefully you were successfully able to create a functioning Slack application! I've included resources and background reading dispersed throughout the article and I'm happy to answer any questions you may have!

Final Repo with code: https://github.com/lsurasani/ron-swanson-slack-app/

Originally published by Lekha Surasani at freecodecamp.org

========================================

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Learn More

☞ AWS Serverless APIs & Apps - A Complete Introduction

☞ AWS Lambda & Serverless Architecture Bootcamp (Build 5 Apps)

☞ AWS Lambda and the Serverless Framework - Hands On Learning!

☞ Build a Serverless App with AWS Lambda - Hands On!

☞ Serverless React with AWS Amplify - The Complete Guide

☞ Serverless Architecture on Amazon Web Services

#serverless #web-development

What is GEEK

Buddha Community

How to build an learning app like BYJU's| Cost to build app like BYJU's?

Due to schools & Colleges being closed due to Covid-19 Pandemic, the need for e-learning platforms like Byju’s has seen a rapid rise among school students. The rise is so fast that in just 3 months from the beginning of lockdowns its user base increased by twice.

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How long does it take to develop/build an app?

With more of us using smartphones, the popularity of mobile applications has exploded. In the digital era, the number of people looking for products and services online is growing rapidly. Smartphone owners look for mobile applications that give them quick access to companies’ products and services. As a result, mobile apps provide customers with a lot of benefits in just one device.

Likewise, companies use mobile apps to increase customer loyalty and improve their services. Mobile Developers are in high demand as companies use apps not only to create brand awareness but also to gather information. For that reason, mobile apps are used as tools to collect valuable data from customers to help companies improve their offer.

There are many types of mobile applications, each with its own advantages. For example, native apps perform better, while web apps don’t need to be customized for the platform or operating system (OS). Likewise, hybrid apps provide users with comfortable user experience. However, you may be wondering how long it takes to develop an app.

To give you an idea of how long the app development process takes, here’s a short guide.

App Idea & Research

_Average time spent: two to five weeks _

This is the initial stage and a crucial step in setting the project in the right direction. In this stage, you brainstorm ideas and select the best one. Apart from that, you’ll need to do some research to see if your idea is viable. Remember that coming up with an idea is easy; the hard part is to make it a reality.

All your ideas may seem viable, but you still have to run some tests to keep it as real as possible. For that reason, when Web Developers are building a web app, they analyze the available ideas to see which one is the best match for the targeted audience.

Targeting the right audience is crucial when you are developing an app. It saves time when shaping the app in the right direction as you have a clear set of objectives. Likewise, analyzing how the app affects the market is essential. During the research process, App Developers must gather information about potential competitors and threats. This helps the app owners develop strategies to tackle difficulties that come up after the launch.

The research process can take several weeks, but it determines how successful your app can be. For that reason, you must take your time to know all the weaknesses and strengths of the competitors, possible app strategies, and targeted audience.

The outcomes of this stage are app prototypes and the minimum feasible product.

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How to start an electric scooter facility/fleet in a university campus/IT park

Are you leading an organization that has a large campus, e.g., a large university? You are probably thinking of introducing an electric scooter/bicycle fleet on the campus, and why wouldn’t you?

Introducing micro-mobility in your campus with the help of such a fleet would help the people on the campus significantly. People would save money since they don’t need to use a car for a short distance. Your campus will see a drastic reduction in congestion, moreover, its carbon footprint will reduce.

Micro-mobility is relatively new though and you would need help. You would need to select an appropriate fleet of vehicles. The people on your campus would need to find electric scooters or electric bikes for commuting, and you need to provide a solution for this.

To be more specific, you need a short-term electric bike rental app. With such an app, you will be able to easily offer micro-mobility to the people on the campus. We at Devathon have built Autorent exactly for this.

What does Autorent do and how can it help you? How does it enable you to introduce micro-mobility on your campus? We explain these in this article, however, we will touch upon a few basics first.

Micro-mobility: What it is

You are probably thinking about micro-mobility relatively recently, aren’t you? A few relevant insights about it could help you to better appreciate its importance.

Micro-mobility is a new trend in transportation, and it uses vehicles that are considerably smaller than cars. Electric scooters (e-scooters) and electric bikes (e-bikes) are the most popular forms of micro-mobility, however, there are also e-unicycles and e-skateboards.

You might have already seen e-scooters, which are kick scooters that come with a motor. Thanks to its motor, an e-scooter can achieve a speed of up to 20 km/h. On the other hand, e-bikes are popular in China and Japan, and they come with a motor, and you can reach a speed of 40 km/h.

You obviously can’t use these vehicles for very long commutes, however, what if you need to travel a short distance? Even if you have a reasonable public transport facility in the city, it might not cover the route you need to take. Take the example of a large university campus. Such a campus is often at a considerable distance from the central business district of the city where it’s located. While public transport facilities may serve the central business district, they wouldn’t serve this large campus. Currently, many people drive their cars even for short distances.

As you know, that brings its own set of challenges. Vehicular traffic adds significantly to pollution, moreover, finding a parking spot can be hard in crowded urban districts.

Well, you can reduce your carbon footprint if you use an electric car. However, electric cars are still new, and many countries are still building the necessary infrastructure for them. Your large campus might not have the necessary infrastructure for them either. Presently, electric cars don’t represent a viable option in most geographies.

As a result, you need to buy and maintain a car even if your commute is short. In addition to dealing with parking problems, you need to spend significantly on your car.

All of these factors have combined to make people sit up and think seriously about cars. Many people are now seriously considering whether a car is really the best option even if they have to commute only a short distance.

This is where micro-mobility enters the picture. When you commute a short distance regularly, e-scooters or e-bikes are viable options. You limit your carbon footprints and you cut costs!

Businesses have seen this shift in thinking, and e-scooter companies like Lime and Bird have entered this field in a big way. They let you rent e-scooters by the minute. On the other hand, start-ups like Jump and Lyft have entered the e-bike market.

Think of your campus now! The people there might need to travel short distances within the campus, and e-scooters can really help them.

How micro-mobility can benefit you

What advantages can you get from micro-mobility? Let’s take a deeper look into this question.

Micro-mobility can offer several advantages to the people on your campus, e.g.:

• Affordability: Shared e-scooters are cheaper than other mass transportation options. Remember that the people on your campus will use them on a shared basis, and they will pay for their short commutes only. Well, depending on your operating model, you might even let them use shared e-scooters or e-bikes for free!
• Convenience: Users don’t need to worry about finding parking spots for shared e-scooters since these are small. They can easily travel from point A to point B on your campus with the help of these e-scooters.
• Environmentally sustainable: Shared e-scooters reduce the carbon footprint, moreover, they decongest the roads. Statistics from the pilot programs in cities like Portland and Denver showimpressive gains around this key aspect.
• Safety: This one’s obvious, isn’t it? When people on your campus use small e-scooters or e-bikes instead of cars, the problem of overspeeding will disappear. you will see fewer accidents.

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Best Electric Bikes and Scooters for Rental Business or Campus Facility

The electric scooter revolution has caught on super-fast taking many cities across the globe by storm. eScooters, a renovated version of old-school scooters now turned into electric vehicles are an environmentally friendly solution to current on-demand commute problems. They work on engines, like cars, enabling short traveling distances without hassle. The result is that these groundbreaking electric machines can now provide faster transport for less — cheaper than Uber and faster than Metro.

Since they are durable, fast, easy to operate and maintain, and are more convenient to park compared to four-wheelers, the eScooters trend has and continues to spike interest as a promising growth area. Several companies and universities are increasingly setting up shop to provide eScooter services realizing a would-be profitable business model and a ready customer base that is university students or residents in need of faster and cheap travel going about their business in school, town, and other surrounding areas.

Electric Scooters Trends and Statistics

In many countries including the U.S., Canada, Mexico, U.K., Germany, France, China, Japan, India, Brazil and Mexico and more, a growing number of eScooter users both locals and tourists can now be seen effortlessly passing lines of drivers stuck in the endless and unmoving traffic.

A recent report by McKinsey revealed that the E-Scooter industry will be worth― $200 billion to $300 billion in the United States, $100 billion to $150 billion in Europe, and $30 billion to $50 billion in China in 2030. The e-Scooter revenue model will also spike and is projected to rise by more than 20% amounting to approximately $5 billion.

And, with a necessity to move people away from high carbon prints, traffic and congestion issues brought about by car-centric transport systems in cities, more and more city planners are developing more bike/scooter lanes and adopting zero-emission plans. This is the force behind the booming electric scooter market and the numbers will only go higher and higher.

Companies that have taken advantage of the growing eScooter trend develop an appthat allows them to provide efficient eScooter services. Such an app enables them to be able to locate bike pick-up and drop points through fully integrated google maps.

List of Best Electric Bikes for Rental Business or Campus Facility 2020:

It’s clear that e scooters will increasingly become more common and the e-scooter business model will continue to grab the attention of manufacturers, investors, entrepreneurs. All this should go ahead with a quest to know what are some of the best electric bikes in the market especially for anyone who would want to get started in the electric bikes/scooters rental business.

We have done a comprehensive list of the best electric bikes! Each bike has been reviewed in depth and includes a full list of specs and a photo.

Billy eBike

 https://www.kickstarter.com/projects/enkicycles/billy-were-redefining-joyrides

To start us off is the Billy eBike, a powerful go-anywhere urban electric bike that’s specially designed to offer an exciting ride like no other whether you want to ride to the grocery store, cafe, work or school. The Billy eBike comes in 4 color options – Billy Blue, Polished aluminium, Artic white, and Stealth black.

Price: $2490

Available countries

Available in the USA, Europe, Asia, South Africa and Australia.This item ships from the USA. Buyers are therefore responsible for any taxes and/or customs duties incurred once it arrives in your country.

Features

• Control – Ride with confidence with our ultra-wide BMX bars and a hyper-responsive twist throttle.
• Stealth- Ride like a ninja with our Gates carbon drive that’s as smooth as butter and maintenance-free.
• Drive – Ride further with our high torque fat bike motor, giving a better climbing performance.
• Accelerate – Ride quicker with our 20-inch lightweight cutout rims for improved acceleration.
• Customize – Ride your own way with 5 levels of power control. Each level determines power and speed.
• Flickable – Ride harder with our BMX /MotoX inspired geometry and lightweight aluminum package

Specifications

• Maximum speed: 20 mph (32 km/h)
• Range per charge: 41 miles (66 km)
• Maximum Power: 500W
• Motor type: Fat Bike Motor: Bafang RM G060.500.DC
• Load capacity: 300lbs (136kg)
• Battery type: 13.6Ah Samsung lithium-ion,
• Battery capacity: On/off-bike charging available
• Weight: w/o batt. 48.5lbs (22kg), w/ batt. 54lbs (24.5kg)
• Front Suspension: Fully adjustable air shock, preload/compression damping /lockout
• Rear Suspension: spring, preload adjustment
• Built-in GPS

Why Should You Buy This?

• Riding fun and excitement
• Better climbing ability and faster acceleration.
• Ride with confidence
• Billy folds for convenient storage and transportation.
• Shorty levers connect to disc brakes ensuring you stop on a dime
• belt drives are maintenance-free and clean (no oil or lubrication needed)

**Who Should Ride Billy? **

Both new and experienced riders

**Where to Buy? **Local distributors or ships from the USA.

Genze 200 series e-Bike

 https://www.genze.com/fleet/

Featuring a sleek and lightweight aluminum frame design, the 200-Series ebike takes your riding experience to greater heights. Available in both black and white this ebike comes with a connected app, which allows you to plan activities, map distances and routes while also allowing connections with fellow riders.

Price: $2099.00

Available countries

The Genze 200 series e-Bike is available at GenZe retail locations across the U.S or online via GenZe.com website. Customers from outside the US can ship the product while incurring the relevant charges.

Features

• 2 Frame Options
• 2 Sizes
• Integrated/Removable Battery
• Throttle and Pedal Assist Ride Modes
• Integrated LCD Display
• Connected App
• 24 month warranty
• GPS navigation
• Bluetooth connectivity

Specifications

• Maximum speed: 20 mph with throttle
• Range per charge: 15-18 miles w/ throttle and 30-50 miles w/ pedal assist
• Charging time: 3.5 hours
• Motor type: Brushless Rear Hub Motor
• Gears: Microshift Thumb Shifter
• Battery type: Removable Samsung 36V, 9.6AH Li-Ion battery pack
• Battery capacity: 36V and 350 Wh
• Weight: 46 pounds
• Derailleur: 8-speed Shimano
• Brakes: Dual classic
• Wheels: 26 x 20 inches
• Frame: 16, and 18 inches
• Operating Mode: Analog mode 5 levels of Pedal Assist Thrott­le Mode

Norco from eBikestore

 https://ebikestore.com/shop/norco-vlt-s2/

The Norco VLT S2 is a front suspension e-Bike with solid components alongside the reliable Bosch Performance Line Power systems that offer precise pedal assistance during any riding situation.

Price: $2,699.00

Available countries

This item is available via the various Norco bikes international distributors.

Features

• VLT aluminum frame- for stiffness and wheel security.
• Bosch e-bike system – for their reliability and performance.
• E-bike components – for added durability.
• Hydraulic disc brakes – offer riders more stopping power for safety and control at higher speeds.
• Practical design features – to add convenience and versatility.

Specifications

• Maximum speed: KMC X9 9spd
• Motor type: Bosch Active Line
• Gears: Shimano Altus RD-M2000, SGS, 9 Speed
• Battery type: Power Pack 400
• Battery capacity: 396Wh
• Suspension: SR Suntour suspension fork
• Frame: Norco VLT, Aluminum, 12x142mm TA Dropouts

Bodo EV

http://www.bodoevs.com/bodoev/products_show.asp?product_id=13

Manufactured by Bodo Vehicle Group Limited, the Bodo EV is specially designed for strong power and extraordinary long service to facilitate super amazing rides. The Bodo Vehicle Company is a striking top in electric vehicles brand field in China and across the globe. Their Bodo EV will no doubt provide your riders with high-level riding satisfaction owing to its high-quality design, strength, breaking stability and speed.

Price: $799

Available countries

This item ships from China with buyers bearing the shipping costs and other variables prior to delivery.

Features

• Reliable
• Environment friendly
• Comfortable riding
• Fashionable
• Economical
• Durable – long service life
• Braking stability
• LED lighting technology

Specifications

• Maximum speed: 45km/h
• Range per charge: 50km per person
• Charging time: 8 hours
• Maximum Power: 3000W
• Motor type: Brushless DC Motor
• Load capacity: 100kg
• Battery type: Lead-acid battery
• Battery capacity: 60V 20AH
• Weight: w/o battery 47kg

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5 Steps To Create An M-learning App

The Ed-Tech industry is booming. The global education technology market size is expected to grow at a CAGR of 18% from 2020 to 2027. Digital education will witness a tremendous shift. And all thanks to the pandemic – Ed-Tech is proving its worth.

Education delivery through technology is still in its infancy. But COVID-19 has driven the growth of e-learning and m-learning apps. Digitization became imminent as students were locked in their homes. Therefore, e-learning apps made their way to connect teachers with students and help them study in a better manner. 

India’s best education app, BYJU’s, is a perfect example of the Ed-Tech revolution. The company is valued at around $12 billion as of 2020. Similarly, Unacademy, Toppr, and other players in the m learning app industry are growing rapidly. 

The need for m-learning app development is now evident in universities, schools, and even private institutions. There are multiple types of mobile educational apps available to students these days. This article will focus on what purpose m-learning applications solve and how you can create an app that can serve students.

Elearning applications are transforming the education industry. Checkout 5 ways e-learning app development is empowering learning and enabling students and teachers to connect in a better way. 

How does an M-Learning App Help?

An e-learning application or m-learning app both provide digital education to students. They facilitate learning by connecting students with teachers, providing study material & resources, and offering support for studying. Learning applications focus on teaching students of different classes or equipping them with career-oriented skills.

What makes educational mobile apps fun is the way they encourage students to learn. These apps use gamification, psychology, and best teaching practices to help students learn in a better manner. Today, many schools and universities provide mobiles and tablets with their own m learning app to guide students through the course material and teach them. 

Here’s how an m-learning app helps both students and teachers –

• Students learn anywhere anytime by opening the application and accessing their course material. It gives them flexibility and control over their learning.
• Teachers provide online lectures & classes to students, enabling students faraway to take their course and learn without physically visiting the campus (prevalent during the pandemic).
• The cloud m-learning solutions store a virtually unlimited number of resources. Students get access to limitless course material, study guides, tests, and more just at the tap of a thumb.
• Rich-features like geolocation, accelerometers, cameras make learning interactive and keep students engaged throughout the curriculum.

Apart from this, students and teachers can track the progress of every subject and how the student is performing through online assessments. Some E-learning apps enable parents to connect with teachers to discuss their child’s progress.

Creating an Mobile Learning App in 2021

Now that you have learned how an education application can benefit the industry let’s move on to understanding the process of m-learning app development. 

Building an m-learning app requires careful consideration of the following factors – 

1. Purpose of the app
   • The first step is to decide the purpose of the application. Elearning & education apps serve a wide variety of goals. You can have an application to deliver curriculum products that include course material and resources.
   • Do you want an application only for teachers to grade and assess students, connect with parents, and more? Is the application for managing the school or university operations? Do you want the application solely for teaching online? Determining this will help you identify why you want to create an educational app.
2. Identify your budget
   • M-learning applications can cost anywhere between $20,000 – $80,000, depending on the type of application and features you want. You should always determine your budget at the beginning of a project. If you aim to monetize the app, it will cost you more than a basic app.
   • The cost for a static and dynamic educational app is different. The more layers of interactivity and engagement you add, the higher it will cost you. Mobile application for eLearning requires functions to connect students and teachers – therefore, you should have a high budget for the m-learning solutions.
3. Key app features
   • The next factor to consider is the essential feature list. M-learning app development becomes easier when you have the core functionality laid out. Basic features like user login, dashboards, course listing, subscription, online study material should be installed in the first stage of development.
   • In the further steps, you can add tests & quizzes, assessments, and progress tracking. Determining the key features will also help developers to write code easily and build the application as per your requirements. Advanced features like AR-enabled learning may take more time to develop than others.
4. Find a development partner
   • One of the most important steps is to find the right m-learning application development company. There are hundreds of companies that build e-learning applications in the Ed-Tech sector. However, the budget should not be the driving factor in hiring a software development company for your educational app.
   • You can decide to outsource the app development process. It would cost you less than hiring a full-scale development team. The outsourced company will manage the employees. You just have to pay the project price, and everything else will be taken care of by the development partner.
5. Content deployment
   • This is a continuous process. You must start uploading the curriculum, course material, resources, and other things on the application. Content deployment and management are essential for any education app to be a success. Whether you provide courses or a platform for connecting students & teachers, basic material should be uploaded as quickly as possible.
   • Only when you have uploaded the content and material should you test and launch the application. Testing is always advisable as it helps to understand the gaps in the prototype. The app development company can rapidly solve these issues and release new versions of the app for the audience.

Conclusion: Mobile Learning Apps are the Future

Ed-Tech is the future of the education industry. More and more e-learning applications are emerging as a result of digitization in education. Students can get easy access to the best of learning conveniently.

If you want an educational app to cater to a student and teacher segment, our experts at BoTree Technologies, a company of Tntra, can help you. We provide complete m-learning app development for schools, colleges, and private institutions. 

Contact us today for a FREE CONSULTATION.

Source: https://www.botreetechnologies.com/blog/how-to-develop-an-m-learning-app/

#m-learning app #e-learning apps #mobile learning apps #e-learning applications #m-learning app development