Hire Top Freelance Arduino developers with UltraGenius

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Hire only the best Arduino developers among the 20K+ engineers who have applied to UltraGenius

Rishabh

Freelance Arduino Developer

Rishabh is a software engineer having 7+ years of experience writing Arduino sketches for many projects like Arduino based music system, GPS-based tracking system, and many more.

Expert in

Javascript

Arduino

CSS

HTML

Experience

10 Years

Availability

Full Time

Mahesh

Arduino Freelancer

Mahesh is a software engineer having 3+ years of experience in developing Arduino projects and designing various C++ applications. He is also an expertise udeveloping Javascript projects.

Expert in

React.js

Angular

CSS

HTML

Experience

10 Years

Availability

Full Time

John

Part-time Arduino Freelancer

John is a software engineer having 10+ years of experience working with Angular. He has an in-depth knowledge of Angular MVC, Unit testing framework, and RxJS.

Expert in

Express

Angular

CSS

HTML

Experience

10 Years

Availability

Full Time

Hire top talented Arduino freelance developers with UltraGenius

Arduino is an open-source electronics platform written in C++ to ease the use of hardware and software. Arduino hardware boards are connected with the personal computers and laptops to turn on an LED, light a sensor, etc. Arduino Uno is a micro-controller designed on ATmega328P. The board has 6 analog inputs, a USB connection, a 16 MHz quartz crystal, a power jack, a reset button, and an ICSP header.

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UltraGenius ensures that top quality freelance developers with the most talent are hired in less than 72 hours.

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The matches are specifically curated as per your needs. We dim fit 3 skills - Tech, Culture, and Context Fit.

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UltraGenius conducts tests and ensures that only the most suitable developer with the best skills is hired.

Hire best Arduino developers through UltraGenius in 4 easy steps

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Tell us the skills you need

We’ll schedule a call and understand your requirements.

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We find the best talent for you

Get the list of pre-vetted candidates in days.

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Schedule the interviews

We will arrange a call after understanding your requirements.

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Begin your trial

Start working with UltraGenius with a 1-week trial period.

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UltraGenius is the best remote talent network to meet with brilliant developers who are most talented and skilled in the technical field. UltraGenius provides the most fit developers who not only match our job requirements but also our company's culture and working environment.
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Once you are part of UltraGenius, you don't have to look for another platform which can find the top skilled freelance developers with same effort as UltraGenius. UltraGenius's vetting tests and assessments are unmatchable and provides the perfect match for the job role.
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Want to hire freelance Arduino developers on your own? Here are the skills you must look for while hiring a freelance Arduino developer

Hiring freelance Arduino developers might be an intricate task for you if you are a non-technical manager. Arduino is becoming popular with growing IT industry, great examples include Arduino Robot Car, UNO Universal Remote Control, Arduino UNO Home Automation, Arduino Music Instrument, Water Quality Monitoring system, and many more. But, hiring the most skilled freelance Arduino developers among thousands of developers is a challenging task for anyone. So, UltraGenius is here to assist you while recruiting the top talented freelance Arduino developers on your own. UltraGenius understands your job requirements and gets you only the top developers who have in-depth knowledge of software development.

The following skills you must look for while hiring a freelance Arduino developer – 

Steadfast knowldege of HTML and CSS

Knowledge of HTML (Hypertext Markup Language) and CSS (Cascading Style Sheets) is very important for a freelance Arduino developer. You must hire such an Arduino freelance developer who has practiced and worked deeply with these technologies. Knowledge of Flexbox and CSS Grid, in addition to Bootstrap, Semantic and Structural Styling, and Foundation is a must to a freelance Arduino developer. Along with this, the freelance Arduino developer should be well-versed in Javascript libraries especially jQuery and CSS grid systems. 

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Javascript fundamentals + ES6

Javascript is most widely used language in developing several web applications and helps freelance Arduino developers integrate back-end with the front-end easily. The  Arduino freelance developer must be clear with the basic Javascript concepts. ECMAScript 6 (or ES6) is the current version of ECMAScript and is widely used by developers up to a large extent. 

CSS Pre-processors and Frameworks

A CSS pre-processor is a program that extends the functionality of CSS and compiles it into regular CSS. SASS, PostCSS, SCSS, and LESS are the extensions of regular CSS and developers use them for useful functions such as math functions, color manipulation, to write better inline documentation, to easily integrate CSS tools and CSS codebase, and much more. It makes developers write lines of code in very less time because of its in-built functionalities.

You must check the freelance Arduino developer’s knowledge of Bootstrap and Material UI, as these components streamlines the development process and ensures that a web application looks best.

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Knowledge of Network Component Modules

The freelance Arduino developers must possess strong understanding of networking components such as Wi-Fi, Ehternet, Android components, and NFC modules. The network component module is responsible for providing captive login portal detection, IP services, network connectivity monitoring, and defines permissions which makes module perform network-related tasks. The Arduino developers must know about companion network that allows Arduino to establish client-server connection and to read and write information across machines on the web. 

Experience working with Version Control System like Github

Freelance Arduino developers must possess very good knowledge of version control systems, like Git, SVN, TFS, and Mercurial. Mostly, developers use Git for their work. It is the version control system that helps the team in collaborating and organizing your project code, maintain the frequent changes that occur in the code. Git helps in reviewing the old codes and compares them with the newly updated code, pulling the code from their repository, and managing the commit history.

Along with this, the Arduino freelance developers must know how to use add, push, pull, and commit commands, branching, and merging as it allows developers to work independently on the code.

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Excellent understanding of testing frameworks and tools

Rising quick-deployment needs during the development phase, testing has become the most demanding skills for a freelance Arduino developer. Therefore, freelance Arduino developers must have knowledge of Jest, Enzyme, Mocha, Chai, AVA, and Tape for unit testing. For end-to-end testing, they must know about Selenium, Webdriver, Cucumber.js, Nightwatch.js, Cypress, and Puppeteer. For integration testing, they must know about Karma.

Knowledge of Arduino UNO components

Arduino UNO has several components which are important to know for a freelance Arduino developer like – USB connector, Microcontroller, Digital pins, Power port, TX RX LEDs, Crystal oscillator, USB interface chip, Analog input pins. The freelance Arduino developer must be aware of other Arduinos like Arduino Mini, Arduino Micro, Arduino Starter Kit, MKR2UNO Adapter, Arduino Leonardo, and Arduino Nano. 

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Knowledge of front end technologies like React or Angular

Freelance Arduino developers must know about front end technologies and frameworks particularly React.js or Angular.js. These front-end frameworks are greatly required in today’s market. React is popular for its faster development of Single Page Applications while Angular uses interpolation, dependency injection, and eliminates coding mistakes by using the strongly typed Typescript that resolves many challenges faced by the developers.

Ability to design new hardware solutions for problems

The freelance Arduino developers must have hands-on experience working with various embedded systems and IoT devices. They should have excellent understanding of integrated systems like Supervisory Control And Data Acquisition (SCADA) and know how different hardware communicate with each other.

Strong grasping on C++

Arduino software is developed in C++ so freelance Arduino developers must  be very clear with C++ syntax, Standard Library (STL), which includes a variety of data structures, functions, and algorithms. The freelance Arduino developers must be clear with the OOP concepts and virtual functions, friend functions, pointers, and macros like define and typedef, operator and function overloading.

Proficiency with Arduino Integrated Development Environment

Arduino Integrated Development Environment (IDE) provides a lot of tools and features for Arduino project development. It provides – a text editor for writing C++ code, a toolbar for performing common functions , a menu series, a text console, and a message area. Further, the text editor has several features including cutting, pasting, replacing, and searching a particular text. The toolbar buttons are available to upload and verify programs, open the serial monitor, create, open, and modify the programs. The right corner bottom shows the configured board and serial port. 

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Experience with web markup and UI, UX Concepts

The developer must have a firm understanding of element positioning, displaying the elements, and making components interactive, semantic markup, and other related UX Concepts so they can design the product with the best quality. The developer must be experienced in developing visual effects in presentational markup. For, example – How the heading appears, making text larger and putting weight to it, and giving which color to it, and which markup can include captions, bind columns, and row headings to table cells. 

Strong understanding of Object Oriented Programming

Object Oriented Programming has four pillars on which it stands – Encapsulation, Inheritance, Abstraction, and Polymorphism. Encapsulation protects the class variables from begin directly accessed and modified. The freelance Arduino developers must know about declaring data variables as private and use the getter() and setter() methods to access the data variables. Abstraction, on the other hand, provides only the essential details without showing the implementation details. Inheritance provides the advantage of code-reusability. Polymorphism provides the class to act differently upon invocation. 

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Firm understanding of Arduino firmware and software libraries

Freelance Arduino developers must have firm understanding of Arduino firmwares and software libraries which helps any freelance Arduino developer develop Arduino sketches fast like FastLED, ArduinoJson, WiFiManager, NibbleArray, PrintString, PubSubClient, DHT Sensor Library, Blynk,  and many more.

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Connect with the top 1% freelance Arduino developers of the world at the lowest prices

Arduino is a open-source software written in C++ that includes various firmware and software libraries which connects Arduino hardware with software. Arduino helps working with automation and microcontrollers. But recruiting the best freelance Arduino developers is not an easy task when a large no. of Arduino freelance developers are competing to grab the job opportunities.

Top Interview Questions to ask while hiring a freelance Arduino developer

Arduino UNO have the following components - 

USB connector, power port, analog input pins, digital pins, crystal oscillator, reset chip, USB interface chip, TX RX LEDs.

  • USB connector : This is a printer USB port which loads the sketches from the Arduino Integrated Development Environment (IDE) to the Arduino board. The Arduino board can also be powered via this port. 
  • Power Port : The Arduino board can be powered through an AC-to-DC battery or an adapter. The power source can be connected with Arduino programs by plugging in a 2.1mm center-positive plug into the power jack of the board.
  • Micro-controller : It is a type of black rectangular chip with 28 pins. The microcontroller used on the Arduino UNO board is Atmega328P. Atmega328P has the following components - Flash Memory, Random Access Memory (RAM), Electrically Erasable Programmable Read Only Memory (EEPROM), and Central Processing Unit (CPU).
  • Digital Pins : Digital Pins is used as an input or output pins and acts as a power supply source for the components connected to digital pins. 
  • Reset Switch : When this switch is clicked, it sends a logical pulse to the reset pin of the Microcontroller and runs the program from the start again.
  • Crystal Oscillator : Crystal Oscillator ticks 16 million times a second. The microcontroller performs a single operation like addition, subtraction, multiplication, etc. on each tick.
  • TX-RX LEDs : TX stands for transmitting and RX stands for receiving. These are the indicator LEDs which lights on whenever the UNO board is transmitting or receiving information.
  • USB interface chip : USB acts as a signal translator. USB interface chip converts USB level signals to a level that is understood by Arduino boards.
  • Arduino UNO board consists of 20 input/output pins which includes 8 digital input/output pins, 6 analog pins, and  6 PWM (Pulse Width Modulation ) pins.
  • Arduino UNO's crystal oscillator comes with a frequency of 16 MHZ.
  • The Pulse Width Modulation pins are present on the UNO board that helps in deriving analog results with digital means.
  • The input voltage of Arduino UNO board ranges from 7 Volt to 20 Volt.
  • UNO board comes with an integrated Wi-Fi module and is based on the Integrated Wi-Fi ESP8266 Module and ATmega328P microcontroller.
  • Arduino UNO board derives power either from power supply or from USB.

The pinMode() function is used to specify the configured pin either as an input or an output. The syntax of the function is - pinMode(pin, mode), where pin is the pin number and mode is either INPUT, OUTPUT, or INPUT_PULLUP according to the pin number. INPUT_PULLUP mode enables the internal pull-up resistors and INPUT mode disables the internal pull-up resistors explicitly.

 

The digitalWrite() function is used to write a LOW or HIGH value to a digital pin in a Arduino sketch (program). When a digital pin is configured in pinMode() function as an OUTPUT, then its voltage is set to 3.3V on 3.3 V boards or 5V on 5V boards for HIGH and 0V for LOW. If the configured pin is INPUT, the digitalWrite() function will enable HIGH the input pullup on the input pin.

Interrupts in Arduino stop the current working of an Arduino sketch. For example, if a main program is running and serving a function in the circuit, when an interrupt occurs in the program it halts it and carries out another routine. Interrupts are of two types - 

  • Software Interrupts - Software interrupts occur in an Arduino sketch in response to any instruction given in the program. The attachInterrupt() function is the only interrupt supported by Arduino language.
  • Hardware Interrupts - Hardware Interrupts takes place in response to an external disturbance like pin high or low.

Pulse Width Modulation (PWM) is the process of generating low frequency pulses from high frequency signals.  PWM signal operates a motor by switching ON and OFF very quickly. The speed of a motor is controlled by varying the pulsewidth of a PWM signal.

  • while() - The while loop will run continuously until the condition inside the loop becomes false. For example, while(condition==true) {}
  • for() - The for loop executes a mentioned number of times. The for loop is initialized with a value, conditioned with an expression, and manipulated with some arithmetic operation. For example, for(int i=0;i<10;i++)
  • Nested loop - Nested loop has one loop inside another loop. if(condition_statement){ if(condition_statement){ } else{ // statements }}
  • Infinite loop - Infinite loop has no terminating condition, for example, while(true).

A Serial Peripheral Interface (SPI) is an Arduino system used for serial communication. SPI uses up to four conductors, normally, three. One  conductor is used for receiving data, second one is used for sending data, one for synchronization, and  another for alternatively to communicate with other device. SPI is a full duplex connection in which the data is sent and received simultaneously. The maximum baud rate is more than the I2C communication system.

SPI uses four wires - 

  • MOSI - It is Master Output and Slave Input wire.
  • MISO - It is Master Input and Slave Output wire.
  • SCK - It is the serial clock wire  operated by the master.
  • SS - It is the wire of slave selection.

Frequently Asked Questions

UltraGenius is one of the leading platforms for hiring remote talent and connecting freelance and part-time developers with Silicon Valley businesses. We focus on finding the best talents who will perform extremely well and will be easily integrated into your teams. We filter out only the top 1% most skilled freelance developers among the 20K+ developers who have applied on our platform. Candidates have to prove their self-reported experience by giving Ultragenius’ s skill tests.

UltraGenius first tests the developer’s skill set by conducting a two and half hour hiring test. Our hiring test judges a candidate on all aspects like aptitude, case study analysis, verbal and reasoning, coding questions based on data structures and algorithms, software engineering, system design, and more. Then, there is another round for the candidates who are selected from this round called “Higher-level Assessment Skill Test”, which is a video round that deeply analyzes Arduino freelance developers’ major skills and asks questions about the projects they have worked upon.

Fill up the form which is on every hiring freelancers’ page and we will inform you once we select the top 1% freelance Arduino developers matching your job requirements.  After analyzing the candidates based on their resumes and two assessment tests, we provide you the feedback quickly. And if the freelancers selected by our team are fit for your job role, then we also provide the onboarding.

UltraGenius offers you only the most skilled freelance developers who are top 1% among the 20K+ freelance developers who have applied on our platform. After a rigorous selection and testing process, we sort out only the top candidates for you. You can check out UltraGenius’ s selection process for hiring freelance Arduino developers on https://www.ultragenius.club/hire-arduino-freelancer/.

UltraGenius provides you the best facility to hire freelancers in more than 50 skills like React, Angular, Javascript, Node, Java, Python, Magento, Ruby On Rails, Golang, PHP, WordPress, .NET, Android, iOS, DevOps, Machine Learning, and many more.