Smart Extension Board

A IoT based Smart Extension Board Using ESP Module

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Introduction

This Smart Extension Board is a Smart Home Automation Project using a famous Microcontrollers known as Espressif's chips, modules and development boards are widely deployed in such products as home appliances, light bulbs, smart speakers, consumer electronics and payment terminals

Technologies Used:

• The popular and widely used ESP Modules are ESP32 and ESP8266.
• The ESP Modules are low-cost, low-power system on a chip series of microcontrollers with Wi-Fi and Bluetooth capabilities.

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Demo video

Schematics and Project

ESP8266 Based:

Project Demo Picture	Project Internal Wiring

### ESP32 Based:

Coming Soon ...

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Prerequisites

1. ESP32 or ESP8266 Module
2. 4-Channel Relay Module
3. Touch Sensor TTP223 or Push Button Switch
4. Arduino IDE Packages - ESP8266 Library, Wifimanager Library by tzapu

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Installation

Quickstart

1. Download the Package and Extract it
2. Connect the ESP Module to your computer and Upload the sketch
3. Using the given Schematic Diagram connect all GPIO pins and wire.
4. Turn on wi-fi config Mode by pressing the wi-fi toggle switch and then the wi-fi led will glow indicating the wi-fi config mode has been activated.
5. Using a Smartphone or any devices that have wifi and browser, connect to the Wireless Access Point named as Smart-ExtBoard-AP
6. After connecting to the wi-fi Access Point, It will go to the IP Address of 192.168.4.1
7. Select the wi-fi and enter password to connect the ESP to your wi-fi
8. After connecting successfully the Wifi Indicator will turn off itself
9. Now you can use any device connected to the Wi-fi to control the Smart Extension Board switches by going to the IP Address of ESP Module.

Important

To know the IP Address of the ESP Module, just enter to the Wi-fi config mode again and you will see the IP address of the ESP that connected to your wi-fi like 192.168.x.x, and then click Exit.

10. You can also control it using manual Switches (Push Button or Touch Sensor) and yes, it can also work in offline.

Caution

Working with Ac Current Is Highly Dangerous, Take Proper Precautions While Working With High Voltage. Do It At Your Own Risk.

How to tweak the project for your own use case

• You can use either Touch sensor or Push button for manual control, while the touch sensor TTP223 Module requires power, push button does not need any.

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Usage

- Smart Home Automation
- Office Automation
- Voice Assitance based control
- Google Assistant and Amazon Alexa

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Challenges Faced and Lessons Learned

• The GPIO pins that I selected in ESP8266 are the only GPIO pins that an ESP8266 Module can be allow to be used to create this Smart Extension Board.
• None other combination of GPIO Pins will work properly in ESP8266, because of some GPIO Pins are not recommended to use, and others have very specific functions.
• Even though I already read various PDF Manuals of the ESP8266. To find those right ESP8266 GPIO Pins, it literally took me Days.
• So No matter how many Documentations we read, there will always be a thing that will make us confusing and irritating while doing the Real Project.
• Therefore always Keep Learning and be Enthusiastic to break down those hard walls.

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Known Issues

• The Webpage used to control the Smart Extension Board is very simple and doesn't give much information except the ON and OFF status.
• I have made this project in a way that it can be only controlled by the webpage in a LAN.
• Google Assistant and Alexa control are very time consuming to implement properly.

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

• Any changes in webpage that controlling the Smart Extension Board are great.
• Any Opensourced Google Assistant and Alexa Implementation are welcome.

License

MIT - License