DZone
Thanks for visiting DZone today,
Edit Profile
  • Manage Email Subscriptions
  • How to Post to DZone
  • Article Submission Guidelines
Sign Out View Profile
  • Post an Article
  • Manage My Drafts
Over 2 million developers have joined DZone.
Log In / Join
Please enter at least three characters to search
Refcards Trend Reports
Events Video Library
Refcards
Trend Reports

Events

View Events Video Library

Zones

Culture and Methodologies Agile Career Development Methodologies Team Management
Data Engineering AI/ML Big Data Data Databases IoT
Software Design and Architecture Cloud Architecture Containers Integration Microservices Performance Security
Coding Frameworks Java JavaScript Languages Tools
Testing, Deployment, and Maintenance Deployment DevOps and CI/CD Maintenance Monitoring and Observability Testing, Tools, and Frameworks
Culture and Methodologies
Agile Career Development Methodologies Team Management
Data Engineering
AI/ML Big Data Data Databases IoT
Software Design and Architecture
Cloud Architecture Containers Integration Microservices Performance Security
Coding
Frameworks Java JavaScript Languages Tools
Testing, Deployment, and Maintenance
Deployment DevOps and CI/CD Maintenance Monitoring and Observability Testing, Tools, and Frameworks

The software you build is only as secure as the code that powers it. Learn how malicious code creeps into your software supply chain.

Apache Cassandra combines the benefits of major NoSQL databases to support data management needs not covered by traditional RDBMS vendors.

Generative AI has transformed nearly every industry. How can you leverage GenAI to improve your productivity and efficiency?

Modernize your data layer. Learn how to design cloud-native database architectures to meet the evolving demands of AI and GenAI workloads.

Related

  • How To Build a Financial App With Proactive Security Measures
  • Everything You Need to Know and Do With Load Balancers
  • Securing VMs, Hosts, Kubernetes, and Cloud Services
  • How to Get Started With the Smart Parking

Trending

  • Accelerating Debugging in Integration Testing: An Efficient Search-Based Workflow for Impact Localization
  • Orchestrating Microservices with Dapr: A Unified Approach
  • How to Merge HTML Documents in Java
  • Detection and Mitigation of Lateral Movement in Cloud Networks
  1. DZone
  2. Software Design and Architecture
  3. Cloud Architecture
  4. ESP8266 Wi-Fi Fan Controller

ESP8266 Wi-Fi Fan Controller

Learn how to build a Wi-Fi-capable fan controller. For this project, we'll use EasyIoT Cloud and assorted hardware to build a temperature-sensing fan.

By 
Igor Jarc user avatar
Igor Jarc
·
Mar. 22, 18 · Tutorial
Likes (3)
Comment
Save
Tweet
Share
26.6K Views

Join the DZone community and get the full member experience.

Join For Free

In this tutorial, we will show how to build Wi-Fi fan controller. The fan controller is connected to the internet and EasyIoT Cloud over Wi-Fi. For this purpose, we will use an ESP8266. The controller can monitor temperature and, in case the temperature increases, power on the fan.

Main ESP8266 Fan Controller Features

  • Wi-Fi connected
  • 12V fan output
  • Temperature monitor
  • Fan switch based on temperature
  • Web and mobile application
  • Connected to EasyIoT Cloud
  • ESP8266 WEB configuration page



Materials

  • ESP8266 Wi-Fi module

  • DS18B20 Dallas temperature sensor

  • 12V 3Pin DC Brushless PC Computer Case Cooling Fan

  • N-Channel MOSFET (IRLZ44N)

  • Resistors 220M, 4.4K, 1K

  • Prototype PCB

  • AMS1117-3.3V regulator

  • 220uF capacitor

  • 12V 1A/2A Transformer Travel Power Supply Adapter US EU UK Plug

Build

For simplicity, we will use ESP8266 NODE MCU, but you can use any other type of ESP8266.

Connections

Power Supply

ESP8266 uses a 3.3V power supply and 12V computer fan. In our case, we will use 12V power supply and add an additional 3.3V AMS1117 regulator to step down the voltage to 3.3 V. 

We connect the GND and the 3.3V output of the regulator to the ESP8266 GND and 3.3V pin.

DS18B20 Dallas Temperature Sensor

DS18B20 is powered by 3.3V, and the digital output is connected to the ESP8266 D2 pin. We also use a 4.7K pull up resistor.

Computer Fan

The computer fan is powered by 12V AC. There are 3- and 4-pin connection versions. In our case, we will use only 2 pins — GND and 12V VCC. The fan is controlled by a MOSFET IRLZ44N connected to the ESP8266 D1 pin.

IRLZ44N pinout

Computer fan pinout

Source Code

Additional libraries are here: lib.

ESP8266 Source Program

The ESP8266 source code can be found on GitHub. Upload the program with ESP8266 Arduino IDE.

Before you upload the program to the ESP8266, it's recommended to change these lines:

#define AP_SSID "xxx"
#define AP_PASSWORD "xxx" 
#define EIOTCLOUD_USERNAME "xxx"
#define EIOTCLOUD_PASSWORD "xxx"


If you forget to change those settings, you can press the FLASH button on the ESP8266 NODE MCU module. The ESP8266 will go into config mode. This means it works as an access point with the configuration server. After you press the FLASH button, use a mobile phone and search for AP (access points) available nearby. Connect to the access point with the name Device xx-xx-xx-xx-xx. xx-xx-xx-xx-xx will be some random letters. After you connect to the AP, open a web browser and enter the IP address 192.168.1.4. If you did everything correctly, the browser opens a config page:

ESP8266 config page
ESP8266 config page

After you enter the correct data, press the submit button and the ESP8266 will restart with the new settings.

Configure EasyIoT Cloud

No manual configuration is needed. The program will automatically add the new module to EasyIoT Cloud. First, you need to register to EasyIoT Cloud.

Cloud Computer Mobile phone mobile app Upload Connection (dance) Monitor (synchronization) Build (game engine)

Published at DZone with permission of Igor Jarc, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.

Related

  • How To Build a Financial App With Proactive Security Measures
  • Everything You Need to Know and Do With Load Balancers
  • Securing VMs, Hosts, Kubernetes, and Cloud Services
  • How to Get Started With the Smart Parking

Partner Resources

×

Comments
Oops! Something Went Wrong

The likes didn't load as expected. Please refresh the page and try again.

ABOUT US

  • About DZone
  • Support and feedback
  • Community research
  • Sitemap

ADVERTISE

  • Advertise with DZone

CONTRIBUTE ON DZONE

  • Article Submission Guidelines
  • Become a Contributor
  • Core Program
  • Visit the Writers' Zone

LEGAL

  • Terms of Service
  • Privacy Policy

CONTACT US

  • 3343 Perimeter Hill Drive
  • Suite 100
  • Nashville, TN 37211
  • support@dzone.com

Let's be friends:

Likes
There are no likes...yet! 👀
Be the first to like this post!
It looks like you're not logged in.
Sign in to see who liked this post!