Published March 4, 2021 © MIT

Led Control Over the Internet(IoT)

In this project I am going to show how we can control our home appliance like light(LED Light) by using our Home WiFi.

IntermediateFull instructions provided3 hours1,685

Things used in this project

Hardware components

NodeMCU ESP8266 Breakout Board

Breadboard (generic)

5 mm LED: Red

Male/Female Jumper Wires

Jumper wires (generic)

USB-A to Mini-USB Cable

Software apps and online services

Arduino IDE

Story

Introduction

Here, in this project we are going to build up a system that will control some LED lights by using our Home WiFi. We can control our home appliances by using our Home WiFi. In this project we are going to control three LED lights using Cayenne IoT platform.

Connections

D0 ---------------------------- Anode (Green LED)

D1 ----------------------------- Anode (RED LED)

D2 ---------------------------- Anode (Yellow LED)

GND ------------------------- Breadboard Positive Rail

3V ---------------------------- Breadboard Negative Rail

Pin Diagram of NodeMCU(esp8266)

NodeMCU (esp8266) Board Setup

Steps are going to discuss below:

Step-1

A. Open Arduino IDE

B.File --> Preferences or from keyboard type (Ctrl +,). You will see a new window. Then go to the Additional Boards Manager URLs and paste the link down below.

http://arduino.esp8266.com/stable/package_esp8266com_index.json

Step-2

A. In this step we need to go to the Tools---> Board ---> Board Manager

B. Next a new window will appear. Then we need to search esp8266 package and install it.

C. Now go to the Tools-->Board--->NodeMCU 1.0 (ESP-12E Module)

Now we are ready to building up our project using NodeMCU.

Cayenne IoT Platform Setup

1. In your Arduino IDE go to Sketch ---> IncludeLibrary ---> Manage Libraries

2. Then Search for CayenneMQTT library and install it in your Arduino IDE.

3. Go to the cayenne IoT platform website (https://developers.mydevices.com/cayenne/features/)

4. Create a new account. If you have an account SIGN IN to the platform.

5. In the next phase we need to connect the Cayenne IoT platfrom with our NodeMCU. For this we need to add a new device to the website. Click on the Add New button. Then click on the Device/Widget button. Now search the Generic ESP8266 Board and click it.

6. Now click a new page will appear. There we will find the MQTT USERNAME, MQTT PASSWORD and CLIENT ID. Copy them and paste to your code.

7. Then upload the code to your NodeMCU. After completing the upload your NodeMCU board will connect to the Cayenne IoT platform website.

8. Then you can add buttons to control (ON/OFF) your LED Lights.

9. Go to Add New ---> Device/Widget ---> Custom Widgets ---> Button and add the Button Name, choose device, Sensor Data to Digital Actuator, Sensor Unit will be Digital(0/1), Channel Number(According to the code) and finally choose Button Icon.

10. Finally click on the Add Widget button. The new button will add to your dashboard.

11. Now you can control(ON/OFF) your LED light from Cayenne IoT platform website.

Project Video

Caution

Do not mismatch any connections.

Additional link

Schematics

Code

Code for LED Light Control Over the Internet

//Important Libries
#define CAYENNE_PRINT Serial
#include <CayenneMQTTESP8266.h>
#include <ESP8266WiFi.h>

char ssid[] = "Your WiFi SSID name"; //Your Wifi Network Name
char wifiPassword[] = "Your WiFi Passsword"; //Your Wifi Password

char username[] = "Username from Cayenne website"; //This User Name From Cayenne Website
char password[] = "Password from Cayenne Website"; //This Password From Cayenne Website
char clientID[] = "ClientID from Cayenne Website"; //This Client ID From Cayenne Website

int light1 = 16; // Define Led Light
int light2 = 5;
int light3 = 4;

void setup() {
  pinMode(light1, OUTPUT);
  pinMode(light2, OUTPUT);
  pinMode(light3, OUTPUT);

  Serial.begin(115200);
  Cayenne.begin(username, password, clientID, ssid, wifiPassword);

}

void loop() {
  Cayenne.loop();
}

//Channels for Controlling Home Appliances
CAYENNE_IN(1)
{ CAYENNE_LOG("CAYENNE_IN_DEFAULT(%u) - %s, %s", request.channel, getValue.getId(), getValue.asString());

  int i = getValue.asInt();
  digitalWrite(light1, i);
}

CAYENNE_IN(2)
{ CAYENNE_LOG("CAYENNE_IN_DEFAULT(%u) - %s, %s", request.channel, getValue.getId(), getValue.asString());

  int j = getValue.asInt();
  digitalWrite(light2, j);
}

CAYENNE_IN(3)
{ CAYENNE_LOG("CAYENNE_IN_DEFAULT(%u) - %s, %s", request.channel, getValue.getId(), getValue.asString());

  int k = getValue.asInt();
  digitalWrite(light3, k);
}

Credits

Khaled Md Saifullah

18 projects • 44 followers

🦸Tech Enthusiast 👨🏾‍💻Programmer 📳IoT Specialist

Led Control Over the Internet(IoT)

Things used in this project

Hardware components

Software apps and online services

Story

Introduction

Connections

Pin Diagram of NodeMCU(esp8266)

NodeMCU (esp8266) Board Setup

Cayenne IoT Platform Setup

Project Video

Caution

Additional link

Custom parts and enclosures

Fritzing file

Schematics

Led Light Control Over Internet

Code

Code for LED Light Control Over the Internet

Code link for LED light control using internet

Credits

Khaled Md Saifullah

Comments

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Led Control Over the Internet(IoT)

Led Control Over the Internet(IoT)

Things used in this project

Hardware components

Software apps and online services

Story

Introduction

Connections

Pin Diagram of NodeMCU(esp8266)

NodeMCU (esp8266) Board Setup

Cayenne IoT Platform Setup

Project Video

Caution

Additional link

Custom parts and enclosures

Fritzing file

Schematics

Led Light Control Over Internet

Code

Code for LED Light Control Over the Internet

Code link for LED light control using internet

Credits

Khaled Md Saifullah

Comments

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