Session on – Build Your Smart Home Hand Sanitizing Dispenser

Event Details

Live Workshop on Youtube:

Registration Link:

Title: Build Your Own Smart Hand Sanitizing Dispenser

Date: 4th july 2020

Day: Saturday

Time: 6.00 PM – 7.30 PM

Type: Live on Makers Madurai Youtube channel

Event Status

#30+ Registrations

#60+ Viewers

#40% Female Attendees

#50+ Peak Concurrent Viewers

100+ Impressions

Event Speaker

Speaker Name Company Profile
Mr.Madhan Kumar IoT Engineer @ Geomeo Informatics Pvt Ltd


Event Organizer

Organizer Mrs.R.Padma Priya, Women Techmakers Madurai.
Co-Host Ms.M.G.Soundariya , Program Coordinator @GeeksUp
Targeted Audience Developers & Students
Event Platform Makers Madurai YouTube Channel

Event Agenda

Time Topic
6.00 PM Welcome Note
6.15 PM What is IoT?
6.30 PM Session on – Build Hand Sanitizing Dispenser
7.15 PM Q & A

Event Objective

The main objective of this session How to “Build your own smart Hand Sanitizing Dispenser” with IoT. Hereafter Makers Madurai gives a good chance to build your smart own hand sanitizing Dispenser with IoT.

Event Summary

On 4th July 2020, Makers Madurai & GeeksUp organized a live session through youtube, titles “Build your own smart hand Sanitizing Dispenser by using IoT Technologies. Mrs.Padmapriya organizing this session and Ms.Soundariya introduced the speakers of the day after welcoming all the attendees of the session. The session were handed over to Mr.Mathan Kumar.

Now, the enthusiastic session is starts, Viewers are very excited to that topic “What is IoT?” Mr.Madhankumar explained about Internet of things – The Internet of things is a system of interrelated computing devices, mechanical and digital machines provided with unique identifiers and the ability to transfer data over a network without requiring human-to-human or human-to-computer interaction.

Viewers are more interesting to learn some new technologies. Mr.Mathankumar continued the session from Simple Technical Explanation of More Expensive Hand Sanitizing Dispenser with IoT. He gave a small speech about “Problem and Prevention of Disease”.

The time is going on! Viewers are increased! Mathankumar explained about Arduino, API Json Schemas, ESP 8266 etc., In that time he gave an essential hint for every projects “Every Processer is important for Every Project”.

The session might continue, he told requirements of the “Smart Hand Sanitizing Dispenser” Project Like Arduino IDE, PHP, AWS, Android Studio & MQTT. Generally, People knows some software such why we use PHP server, IDE, AWS & Android Studio but MQTT is a new word for Viewers. Madhan explained that protocol “It is a Messaging Protocol” and etc.,

Before that Mr.Madhankumar explained the Architecture of Smart Hand Sanitizing Dispenser project. What are the Hardware kits we want to do this hand sanitizing dispenser? Such as Relay Module, Ultrasonic Sensor, Reset, USB Charger Port, ESP32 Microcontroller, DC Submersible Pump and Finally the hand sanitizing liquid. He explained about every hardware.

Continuing the session, Madhan kumar tolds about Lambda server. What is Lambda Server? Why we use that? and etc., Finally the session goes to end. Mr.Madhan Kumar gave some general hint for viewers about Flutter, Dotted board etc.,

The total program was streamed live on Makers Madurai Youtube Channel and viewed by numerous viewers. As well as all the upcoming events will be streamed live to develop the community and Knowledge.


Workshop on IoT from scratch (Hands-on)

Makers Madurai and Geeksup – An Bilateral Internet of Things Workshop and Hands-on Session.

Event Date: 14th March 2020.                                     Day: Saturday

Timings: 10 AM to 2.00 PM

Venue: Makers Madurai Pasumalai

About this event:

IoT Workshop is a bilateral event oversight by IoT real time experts who managed the big platform like Internet of Things. Makers Madurai is an innovative technological event that has been construct to reinforce the maker’s community in everywhere.

Internet of Things is the event accommodate by the Makers Madurai Team and it was hosted by Mr.Madhan Kumar (Explained IoT) and  Mr.Deepak Kumar (Explained the IoT and Trends of IoT).

Event Stats:

  • Invited 100+ People.
  • 60 People Participates in this event.
  • Behalf 60 Students, 30% were Women and 70% were Men.
  • Two Speakers (Mr.Deepak Kumar & Mr.Madhan Kumar) hosted the event.

Event Agenda:

Registration Time: 10.00 – 10.15 AM

Welcome Note: 10.15 – 10.30 AM

IoT Trends and how to work with kit: 10.30 AM – 11.45 AM

Break Time: 11.45 AM – 12.15 PM

Hands on session with real time projects: 12.15 PM – 2.00 PM

Queries Session: 2.00 PM – 2.10 PM

Event Summary:

This is the enthusiastic time the Makers Madurai community has appropriated the Hands on session on IoT. We are so excited to see the participants because they are very interesting and very attentive in this event.

Mr.Deepak Kumar started the speech about “What is IoT ? and How it uses? People are so interesting and the students are studying the 2nd and 3rd year in ECE department and IT Department so they are very attentive to learn about the Iot and trends of Iot.

Continuing this, our IoT developer Mr. Deepak Kumar has explain about “ How the IoT works in real-time with some examples like Air Conditioners in IoT , 4 Components of bridge, Sensors in IoT, Networking details and cloud Computing. These examples are explained through by how the IoT have been worked in these areas.

During this session, it was so good to see some exclusive questionaries’ happened from participants and Deepak has answered every question by showing them real time projects.

The interaction produced a positive vibration among the participants and it continued with the interesting mood till the end of event.

At this juncture, Mr. Deepak has telling about the IoT applications with some examples like Health Monitoring System for Humans (Smart Watches Example) and in Consumer side of things also explained some examples with recent products such as irrigation system used by drones etc.,

Mr. Deepak has explained about the benefits of IoT and how it works in every human life some examples also there like Home automation which means alertness of product running or not from home and he explains about the Big Data, Machine Learning, Block Chain etc.,

After completing the Deepak speech, Mr.Madhan has started the speech for participants. Mr.Madhan says about “First How IoT works and ask the questions about students. Students are replied “we are 2nd and 3rd Year students we don’t know about this and it is a good opportunity for our career platform. And continue the Madhan Speech About in depth of IoT in real time projects.

Hereafter, students shouldn’t know about what is cloud? And How It works etc., At this juncture, our developer has explained from basic of cloud to in depth. Participants has realised how it works in day to day life. During this our speaker has asked some questions about pollutions and how it pollutions are worked with Internet of things and he said some examples also.

However, he give the speech again, Upon this some real time projects also we expand to participants like Raspberry pi, Arduino, Node MCU etc. and since he explained what are the products we want to interface with IoT (Web Interface, Mobile App Development). Due to this, student is asked what are the programming languages to do IoT Products. Madhan also explained that Questions like some languages such as, C, C++, Python, Json etc. One Participant has said, now a days Json is important thing to all.


And we have to learn some Basic Electronic and Circuit Design because these are very important for IoT platform.  Some platforms also there to develop IoT that’s Cloud platform and hardware platform.

Now the event has come to frequently asked question session. Here people are so interest to ask the questions about IoT.

After break the real time project session is conducted to students, they are very interest to handle the board like Arduino UNO and very interest to programming also. Our Mentors are very happy to teach us. Finally, the real time project session also completed.

Feedback: participants gave the excellent feedback, that’s “we don’t know about the Advanced technologies in IoT”. This session is very useful to us and “we don’t know how many things are contained this IoT”. So we are very happy.


Makers Madurai – IOT Project Ideas and Discussions – 2020

Makers Madurai – IOT Project Ideas and Discussions – 2020

Event Date: 1st Feb 2020

Saturday 6 pm to 7.30 pm

Event Date: 1st Feb 2020

Saturday 6 pm to 7.30 pm

Venue: MakersMadurai, Pasumalai


About the Event:

IoT community meet is originated and organized by MakersMadurai and IoT experts from GeoMeo Informatics Pvt. Ltd., The community meeting is originated with a vision to bring basics of networking in IoT and to develop it by providing clarity with knowledge.

The event had a moto to give an overview of IoT, opportunities in it and the future of it. The program was hosted by Mathan Kumar P.


Event Stats:

Invited 100+ people

20+ participants attended the program

Among them 10% of people were women

Employees from 3 companies and 3 cities had taken part in it.

Among all participants most of the people were developers


Event Agenda:

6:00 – 6:10 Welcome Note by Mathan Kumar

6:10 – 6:30 Guest Speech by Yashwanth TB

6:30 – 6:50 Overview and fundamentals of IoT by Deepak Kumar R

6:50 – 7:15 Q & A

7:15 – 7:30 IoT networking

iotmadurai makers madurai


Event Summary:

With a great motto to enlighten the people’s knowledge with IoT technology trends, the community meeting was started and done its part very will in its 1st meet. The session went very well and enthusiastic and interactive.

Mathan Kumar (R&D Engineer, GeoMeo Informatics Pvt. Ltd. Madurai), started the event with his welcome note and handed over the stage to the guest speaker, Yashwanth TB (Firmware Engineer, Continental Automotive Components (India) Pvt. Ltd., Bangalore). He started the session and brought up it very interactive and explained the future and opportunities in the field. When he asked the audience about their knowledge about IoT he got some answers such as Fitbit, iWatch, Samsung watch where they are connected with the internet to monitor health records of the patients, and Tesla’s autonomous and connected cars project. He explained deeply into the opportunities with the example of the automotive industry and connected cars/connected devices. He explained with RF Geolocation, NFC (Near Field Communication), RFID (Radio Frequency Identification) and M2M (Machine to Machine)

After Yashwanth, Deepak Kumar from Savemom Pvt Ltd., Madurai, took over the stage to give an overview and new project ideas and basics of IoT. He explained some ideas for beginners such as

  • LED blinking projects,
  • Motor Speed Controller,
  • Weather Reporting System using IoT,
  • IoT Based Liquid Level Monitoring System, and so on.

Then again Mathan Kumar took over the floor for Questions and Answers session. There were lots of questions has been raised and all the queries were clarified by him.

Mathan explained from the basics about the Internet of Things. As what it is and what is meant by connected devices. He gave brief with an embedded system and microcontroller. He gave a very easy example of the TV remote for the controller of the system. He continued that if the signal passed from a controller to the device to be controlled via an internet-connected embedded gateway could be controlled over the internet and that is called the Internet of Things.

We hope this session would have added value to your knowledge. We will be talking more about IoT practical aspects in our next session.

Finally, the event winded up with networking and taking group photos. The total program was streamed live on Facebook, shared and viewed by numerous viewers. As well all the upcoming events will be streamed live to develop the community and knowledge.




The Internet of Things refers to the idea that, in the near future, everyday objects will be connected to the Internet and will be able to send and receive data. That ‘near future’ is already underway and the Internet of Things can be seen in devices like Amazon Echo, the Fitbit, and the Nest Thermostat.

The Internet of Things is attached to high aspirations a world where your home, car, and even city are connected and using data to improve the quality of life for all. As society moves towards that innovative idea, your company can contribute (and profit).

When you consider the grand scheme of things, many developers try to jump ahead and focus on a product. Essentially, they start running before they can walk. We strongly advocate the POC so that you can demonstrate the viability, as well as understand the needs and steps necessary to attempt creating a marketable product. This exploration is necessary feedback in the design phase.


An IoT PoC is an ideal solution to experience tangible benefits by investing a fraction of the overall cost and efforts. Thus, a PoC can serve as testing water to ascertain how likely the actual implementation is capable of achieving the desired business goals.


Why use Mozilla IoT?

Mozilla IoT is an open source platform for monitoring and controlling devices over the web, including:

  • WebThings Gateway – a software distribution for smart home gateways focused on privacy, security and interoperability
  • WebThings Framework – a collection of reusable software components to help developers build their own web things


Components Required:

  1. NodeMCU ESP8266(To act as a client)
  2. Raspberry Pi ( To act as a server)
  3. 3. 5v Relay module (To control a load)
  4. Bulb and fan (for load)

Components Required:(5v Relay Module)

  1. 5v Relay
  2. BC547 – Transistor
  3. IN4001 – Diode
  4. 230 Ohm Resistor
  5. 1k Ohm Resistor
  6. PBT connector 3 terminal – (to connect load from the relay)
  7. LED – (to indicate whether it is on or off)
  8. Dotted board(2×2)



 1. Download Image file:

First download the latest gateway image from the link given below.

2. Flash Image

Next you will need to flash the downloaded image onto your microSD card. There are various methods of doing this but we recommend using Etcher.




  1. Open Etcher.
  2. Insert your SD card into an SD card reader attached to your computer
  3. Select the downloaded image as the source file
  4. Select your SD card as the target
  5. Click “Flash!”

Once flashing is complete, remove the microSD card.

3. Boot Raspberry Pi

  1. Insert the flashed microSD card into your Raspberry Pi
  2. Plug in any USB dongles
  3. Connect the power supply to boot the Pi

Note: On first boot the Raspberry Pi may take 2-3 minutes to boot.

4. Connect Wi-Fi

When the gateway starts up it will create a Wi-Fi hotspot called “WebThings Gateway XXXX” (where XXXX are four digits from your Pi’s MAC address). Connect to that Wi-Fi hotspot using your desktop/laptop computer, smartphone or tablet.

Once connected you should see the WebThings Gateway welcome screen which will then scan for nearby Wi-Fi networks.


Select your home network from the list and enter your Wi-Fi password to connect.


  • If you are connected to the “WebThings Gateway XXXX” Wi-Fi network but you don’t see the welcome screen, you can try typing into your web browser’s address bar to manually navigate to the page.


  • As an alternative to Wi-Fi, you can connect the Raspberry Pi to your home network using an Ethernet cable and it will attempt to automatically get an IP address from your router. You can then start first time setup by typing “http://gateway.local” into your web browser.
  • If you move the gateway to another location and it can no longer access your home network, it will revert to access point mode so you can connect to it and re-configure a different network.

5. Choose Subdomain


Once you have connected the Pi to your wireless network, you should ensure that your laptop/tablet/smartphone is connected to the same Wi-Fi network and then navigate to http://gateway.local in your web browser.

You will then be given the option to register a free subdomain to safely access your gateway over the Internet using a secure tunnelling service provided by Mozilla.


Enter your choice of subdomain and an email address in case you need to retrieve it later, then click “Create”.


  • You can choose to skip this step (either to only use the gateway locally on your home network or manually configure DNS yourself), but note that currently if you do skip this step you’ll have to re-flash the gateway in order to register a subdomain.
  • If http://gateway.local fails to load (e.g. on Android or Windows) you can look up the IP address of the gateway on your home router and use that instead (look for a hostname of “gateway” or a MAC address starting with “b8:27:eb”.
  • If neither http://gateway.local or http:// will load in your browser, check to make sure your computer is definitely connected to the same Wi-Fi network you connected the gateway to.
  • If you have previously registered a subdomain you want to re-use, enter the subdomain and the email address you used to register it and follow the on-screen instructions to re-claim it.

6. Create User Account

Once you have registered your subdomain you should be automatically redirected to the next step of the setup process, which is to create your first user account on the gateway. Enter your name, email address and a password then click “Next”.


Note: You can create additional user accounts later.


You should then be redirected to an empty “Things” screen of the gateway where you can start to add devices.

STEP 2: Design of 5V Relay Module Design:


Relay module can be designed as per the given diagram with the above mentioned components .When the relay is activated, it can transfer the needed amperage to the horn through wiring which is designed to take the load. Or you can design your own relay module as per your own requirements.


STEP 3: Connecting the NodeMCU with Arduino tool

The connection should be made properly as per the circuit diagram given below or you can make your own connection as per the number components you need to connect.


  1. To set up the NodeMCU you need to install Arduino IDE.
  2. Add the given link in the preferance



  1. Install the board form board manager

Tools–>board–>board manager–>(search for esp8266 and install it)

4.Add the required library

  1. ArduinoJson – can be downloaded in arduino. Sketch->Include Library->Manage Libraries-> ArduinoJson
  2. Wifi101- can be downloaded in arduino. Sketch->Include Library->Manage Libraries-> wifi101
  3. Webthing-arduino  Sketch->Include Library->Manage Libraries-> webthing
  4. ESPAsyncWebServer –
  5. ESPAsyncTCP –
  1. Select NodeMCU1.0(ESP-12E Module) from tools–>board
  2. Select the correct port from tools–>port
  3. Connect the NodeMCU with the pc and upload the code given below


Searching for devices


Next, add the Things(Appliances) to the gateway and it will be prompted if the new smart devices is found where it is being scanned.

In the Mozilla Interface we’ve to search for the available devices, and if any device is on then it will be discovered and we can connect them as easy as possible. Then the controls can be done even with other side of the planet and make sure everything is working properly. We can livestream it too!!


This is how the whole setup looks like:


Fan at ON mode


Fan at Off mode




  1. JSON error – Use this link



  1. We rectified logical error from existing program for our convenience usage.
  2. ASYNCTCP, ASYNCWebserver library error

For more details refer –

Note: Sometimes the relay voltage will be insufficient to activate the load since


As technology grows too fast, we people should be fast enough to make use of it. Mozilla IoT will make the people to get involved in the Internet of Things. It enables the user to control and automate the home appliances, these can be monitored and automatically get operated. If we can control our home appliances from wherever we want, it will save plenty of our money and time also electricity is utilized in an efficient way.


This is how the whole setup looks like:

Download Code for integration.

Looking for more projects, visit our website today!