Hands On Workshop on IoT: From Arduino to JRC Board

8/12/2023 ©FronTech Ltd. Contents from Internet for Knowledge Purpose. 1

Redwan Ferdous
Loves Robotics, Automobiles, Projects, Tech-Investment
- Professional Project Manager (PRINCE2, PMP)
- Director, FronTech Ltd. & Founder, JRC Board
- Worked for Walton, Aamra & Labaid for past 12 years
- B.Sc. (EEE) from AUST
M.Sc. (IT) from JU
MBA (Finance) from DU
ACMP 4.0 from IBA, DU
- Senior Member, IEEE, Life Member, IEB
- Electrical Supervisor of GoB
- Country Representative of Bangladesh for
- International Robot Olympiad
- World Robot Olympiad
- World Robotics Championship
www.redwanferdous.com | https://frontech.global
redwan@frontech.global
8/12/2023 2
©FronTech Ltd. Contents from Internet for Knowledge Purpose.

Ground Rules
• Its an informal session, feel free to ask questions. No matter how silly
or irrelevant you think! Just Ask!
• Please don’t do side talks. You are grown up now!
• Medium of Knowledge sharing: English & Bangla
• You can take snapshots of the PPT! However, all are available on
Slideshare, Github and Internet.
• Today- you come here to get the food of thinking and exploring for
next few weeks. You will not learn everything about IoT and
embedded system today- but you will learn- ‘How to Learn’!

Disclaimer
• You need not to invent wheel all the time, rather its better to create
application using that wheel !!
• Most of the contents of my slides are collected from internet. Credit
mentioned with due respect at the last slide.
• My job is to facilitate the way of learning. Your job is to explore
according to that.
• If you assure me of ‘Practice’, I can assure you of ‘Success’.
8/12/2023 4

And, I’m Considering…
• You have knowledge of the followings:
• Basic Electronics (Resistance, Capacitance, Inductance, Transistor, FET, Diode,
AC-DC, Op-Amp, Opto-couplers)
• Basic Analog and Digital circuitry
• Basic Components (LED, LDR, POT, LCD, Motor)
• Basic Example coding experience in Arduino IDE
8/12/2023 5

Today’s Agenda
• Robotics, IoT
• Starting with Arduino Board
• Getting introduced with Bangladesh’s 1st ever developed IoT
development board- JRC Board
• Projects with Arduino
• Projects with IoT (We need to control our home!!)
• Fun and Learn!

What is Microcontroller?

Microcontroller Development
Board

Embedded System
8/12/2023 11

Embedded System
• The difference between embedded systems designers and software
engineers or IT technicians is the in-depth knowledge of the hardware
that embedded designers possess.
• Embedded designers must have knowledge of electronics to
effectively design embedded systems.
8/12/2023 12

Basic Electronics
8/12/2023 13

Arduino and Sensors
8/12/2023 14

Entry Level Boards
Easy to Use and Ready to Power Your First Creative
Project

Enhanced Feature Boards
The Boards with Advanced Functionalities or Faster
Performances for Complex Projects

Internet of Things Boards
Make Connected Devices Easily with One of these IoT
Boards

Arduino Uno
The Most Popular Arduino in the World

Arduino??
• A microcontroller board, contains
on-board power supply, USB port to
communicate with PC, and
an Atmel microcontroller chip.
• It simplify the process of creating any
control system by providing the standard
board that can be programmed and
connected to the system without the need
to any sophisticated PCB design
and implementation.
• It is an open source hardware, any one can
get the details of its design and modify
it or make his own one himself
8/12/2023 19

Uno Technical Specs
Arduino Uno Tech Specs
Microcontroller ATmega328P
Operating Voltage 5V
Input Voltage 7-12V (recommended), 6-20V (limit)
Digital I/O Pins 14 (of which 6 provide PWM output)
PWM Digital I/O Pins 6
Analog Input Pins 6
DC Current per I/O Pin 20 mA
DC Current for 3.3V Pin 50 mA
Flash Memory 32 KB of which 0.5 KB used by bootloader
SRAM 2 KB (ATmega328P)
EEPROM 1 KB (ATmega328P)
Clock Speed 16 MHz
LED_BUILTIN 13

Anatomy of the Uno
USB
Socket
ICSP
Header2
ICSP
Header1
DC Power
Socket
Atmega32
8P
Fuse
(500mAh)
Atmega16
U2
Power
LED
“L”
LED
16MHz
Crystal
Analog
Inputs
Power
Connectors
Digital
IO Pins

Anatomy of the Uno
USB
Socket
ICSP
Header2
ICSP
Header1
DC Power
Socket
Atmega32
8P
“TX”, “RX”
LED
Atmega16
U2
Power
LED
“L”
LED
Digital
IO Pins
Analog
Inputs
Power
Connectors
16MHz
Crystal

Anatomy of the Uno
Analog
Inputs
ICSP
Header1
DC Power
Socket
USB
Socket
“TX”, “RX”
LED
Atmega32
8P
Power
LED
Power
Connectors
Digital
IO Pins
Reset
Switch
I2C
Pins
16MHz
Crystal

Advantage of Using Arduino
• The advantage of using Arduino are
• Inexpensive
• Cross-platform
• Open-source
• Extensible software and hardware.
• Awesome community for Arduino.
The tutorials provided by the community and the various projects and blog
posts make the ride of learning arduino easy and so it has become an useful
utility for beginners.
8/12/2023 24

Arduino IDE
• The open-source Arduino Software (IDE) makes it easy to write code
and upload it to the board. This software can be used with any
Arduino board.
• The current version of the Arduino IDE is v:2.1 and is compatible with
Windows, Linux and Mac OS. The Arduino IDE can be easily installed
from the website of Arduino.
• URL: https://www.arduino.cc/en/software
8/12/2023 25

Arduino IDE
26
8/12/2023
Version: 01
Version: 02

Getting started with Programming

void setup() {
// put your setup code here, to run once:
}
void loop() {
// put your main code here, to run repeatedly:
}
Bare minimum code

• setup : It is called only when the Arduino is powered on or reset. It is
used to initialize variables and pin modes
• loop : The loop functions runs continuously till the device is powered
off. The main logic of the code goes here. Similar to while (1) for
micro-controller programming.
Bare minimum code

• A pin on arduino can be set as input or output by using pinMode
function.
• pinMode(13, OUTPUT); // sets pin 13 as output pin
• pinMode(13, INPUT); // sets pin 13 as input pin
PinMode

• digitalWrite(13, LOW); // Makes the output voltage on pin 13 , 0V
• digitalWrite(13, HIGH); // Makes the output voltage on pin 13 , 5V
• int buttonState = digitalRead(2); // reads the value of pin 2 in
buttonState
Reading/writing digital values

• What is analog ?
• It is continuous range of voltage values (not just 0 or 5V)
• Why convert to digital ?
• Because our microcontroller only understands digital.
Analog to Digital Coversion

ADC in Arduino Uno

Converting Analog Value to Digital

Quantization the signal

• The Arduino Uno board contains 6 pins for ADC
• 10-bit analog to digital converter
• This means that it will map input voltages between 0 and 5 volts into
integer values between 0 and 1023
ADC in Arduino

• analogRead(A0); // used to read the analog value from the pin A0
• analogWrite(2,128);
Reading/Writing Analog Values

• // These constants won't change. They're used to
give names to the pins used:
const int analogInPin = A0; // Analog input pin that
the potentiometer is attached to
const int analogOutPin = 9; // Analog output pin
that the LED is attached to
int sensorValue = 0; // value read from the pot
int outputValue = 0; // value output to the PWM
(analog out)
void setup() {
// initialize serial communications at 9600 bps:
Serial.begin(9600);
}
void loop() {
• // read the analog in value:
sensorValue = analogRead(analogInPin);
// map it to the range of the analog out:
outputValue = map(sensorValue, 0, 1023, 0, 255);
// change the analog out value:
analogWrite(analogOutPin, outputValue);
// print the results to the serial monitor:
Serial.print("sensor = " );
Serial.print(sensorValue);
Serial.print("t output = ");
Serial.println(outputValue);
// wait 2 milliseconds before the next loop
// for the analog-to-digital converter to settle
// after the last reading:
delay(2);
}
ADC Example

Example: Blinking LED
• There are many example codes in the arduino IDE itself. The following
is for blinking an LED which is analogous to the regular “hello world”
program.
• In the arduino UNO board there is an led at pin 13 which will be used
here. These pins varies for different arduino boards.
8/12/2023 39

Example: Blinking LED
Sketch:
void setup()
{
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
}
// the loop function runs over and over again forever
void loop()
{
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
8/12/2023 40

JRC Board
JRC board is a microcontroller board based on the ESP-
WROOM-32. It has 20 digital input/output pins of which
pin 25 and 26 can be used as analog outputs, 12 analog
inputs, an USB type C connection, an ICSP header and a
reset button. It contains everything needed to support
the microcontroller. Simply connect it to a computer
with a USB cable or battery to get started. Keep Up with
the World A Low-Cost Board for Schools in Bangladesh
and Beyond. Powerful System on Chip. An In-House
Development Board for our future products to blend in
the Existing Ecosystem.

ESP32 chip Reset button
Voltage Regulator
USB Type-C port
Uploader Chip
(FT232RL)
Circuit Protection Diode
GPIO pins
I2C pins
UART pins
GPIO pins
Power pins
RESET pin
Reference pin
L293D IC ICSP pins

Specs and Features:
Processors:
● CPU: Xtensa Dual-Core 32-bit LX6 Microprocessor, operating at 240 MHz and performing
at up to 600 DMIPS.
● Ultra-Low Power (ULP) Co-Processor.
Memory:
● 520KB of RAM (expendable up to 8MB externally)
● 1024 locations for EEPROM
● 4MB of flash memory (expandable up to 16 MB externally)
Wireless connectivity:
● Wi-Fi: 802.11 b/g/n
● v4.2 BR/EDR and BLE
Peripheral Interfaces:
● 12-bit SAR ADC up to 18 channels
● 2 × 8-bit DACs (GPIO 25 and 26)
● 18 × PWM pins (Controlled by up to 16 channels)
● 7 × Touch Sensors (Capacitive Sensing GPIOs)
● 1 × SPI
● 1 × I2S Interfaces
● 1 × I2C Interfaces
● 2 × UART
● All digital pins compatible with external interrupt

Key Features:
● Dual Core Low Power Chip with better clock frequency
● Built-in Wi-Fi & Bluetooth
● Built-in RTC module
● Internal Temperature and Hall sensor
● More Flash Memory & RAM
● Arduino Uno Compatible and shield available
● USB Type C port
● Built-in Motor Driver chip (L293D)
● DIP-16 socket for any other purpose
● Debugging LED
● 16 PWM channel Attachable to almost any pin
● Better PWM resolution and adjustable by program
● PWM frequency adjustable by program.
● 2 DAC output
● 12 analog input with better resolution
● Attach external interrupt on any GPIO pin you want
● Software Reset Compatible

Some precautions and tips:
● This is a 3.3V microcontroller board. Don’t input more than 3.3V into any GPIO pins
● Wi-Fi and Bluetooth feature draw about 300mA on average. Regular USB port can not deliver that
much of current. So, you would better plug in an external power source (battery) through VIN pin.
● Check if you soldered VIN pad before connecting any battery to VIN pin.
● It is okay to input up to 9V into VIN pin. But when you plug into pc by cable while keeping battery
connected, the battery voltage directly effects the computer. So make sure if your USB port of pc is
tolerant above 5V. Else, use buck converter to step down voltage into 5V
● Don’t expect much current delivery from 5V and 3.3V pin. They actually come from FTDI chip
which acts as uploader for ESP32. If you draw more than 40-50 mA from this pin, the chip resets
immediately send reset signal to ESP32. So, the board will keep restarting if you draw much current.

Platforms for developing IoT Solutions:
Hobbyist
• ESP32/ ESP8266
• Arduino
• Raspberry Pi
• Particle
• Intel Edison
• Adafruit Platforms (i.e.Flora)
8/12/2023 46
Most of the contents of this presentation file is collected from internet. The sources are mentioned with respect in the end 03 slides. Thank you to the contributors.

Platforms for developing IoT Solutions: IIoT
• STM32 Development Boards (i.e. STM32L4 IoT Discovery Kit)
• ZedBoard
• Nvidia Jetson (For Machine Learning)
• Sti Microcontroller Based Platforms
8/12/2023 47

Protocols Used in IoT/Smart Devices
• WiFi
• Bluetooth
• ZigBee
• NFC
• Cellular (3G/4G/LTE)
• LoRaWAN
• MQTT (Message Queue Telemetry Transport)
• DDS (Data Distribution Service)
• AMQP
• RFID
• Z-Wave (Low Range-Home appliance usage)
• Sigfox (Cellular +WiFi)
8/12/2023 48

● Search “FT232RL Driver” on google. Click on “VCP Drivers”. That will bring you to a website.
Preparing Driver for JRC Board

● Scroll down a little until you find this section. Click on marked area to download a zip file

● Extract that zip file to find a executable file. Double click on that to install driver for JRC Board.

● After completing installation, you will be able to upload any program to JRC Board

Preparing Board for Arduino IDE
● Open Arduino IDE on your pc
● Click on “file”, then “preferences”

● A window will pop up like this:

● To get the link, search for “ESP32 board manager” in google.

● A window will pop out like this:
● Copy the link from marked area

● Paste the text on previously opened window, then select okay.

● Click on “Tools”, then “Boards”, then “Boards Manager”
V2
V1

● The Board manager window will open
● Search for “ESP32” in search bar. Select the latest version and install it
V2
V1

● ESP32 Board Manager has been installed. Now you will have to select the right board
● Click on “Tools”, then “Boards”, then “ESP32 Arduino”, then “ESP32 Dev module”. Rest will be the same.

● For Arduino IDE Version 2, you can find your desired board manager in different way.
● Click on the board name displaying beside debugging button. A new window will pop up. Here search for “ESP32
Dev Module”, then select your desired COM Port. Rest will be the same.

Today’s Project Map
We will be focusing
on practical projects-
that can be used in
our home and office
from today!!

First Project
Blink your LED

সার্কিট ডায়াগ্রাম

ককার্ডিং
void setup() {
pinMode(13, OUTPUT);
}
void loop() {
digitalWrite(13, HIGH);
delay(1000);
digitalWrite(13, LOW);
delay(1000);
}
ক ামরা Arduino IDE এর কে রর Files -> Examples -> Basic -> Blink এইখারে র্িক কররে একটট
এক্সাম্পে ককাড কেখর পারে কেখারে ককেে LED_BUILTIN এর জায়গায় েরকারী র্পে োম্বার
র্েরখ র্েরেই কাজ হরয় োরে

2nd Project
Enable your IoT Device

সার্কিট ডায়াগ্রাম

Blynk প্ল্যাটফরম ির্েরজর একাউন্ট খুরো
প্রথরমই ব্রাউজারর র্গরয় blynk.io র্েরখ সার্ি করর কসখারে Start Free োটরে র্িক কর্র। কসরেরে ে ুে
একাউন্ট ত রী করার একটট উইরডা আসরে। এখারে র্েরজর কমইে এরেস র্েরখ Sign Up োটরে র্িক কর্র।

এরপর োর োর কমইরে একটট কেফারম ি
শে র্েিংক আসরে। কসই র্েিংরক র্িক কররে র্েরর্র প্রথম উইরডাটট
প্রেশ ি
ে কররে। কসখারে ইউজার কেম এেিং পাসওয়াডি ত রী করার অপশে কেখারে। এখাে কথরক আমরা
র্েরজরের একাউরন্টর ইউজার কেম এেিং পাসওয়াডি র্েরখ র্েই।

এরপর আররকটট উইরডার ে ুে ইউজার কের জেয র্কছ
ু গাইডোইে কেখারে। আমরা এক েজর কেরখ
পরে ী ধারপ কের থার্ক।
1 2 3
4 5 6
7 8

এোর ে ুে ইউরডার কেখারে আমরা র্করসর জেয কপ্রাগ্রাম করর র্াই। আমরা র্ডোইস র্হরসরে ESP32
র্সরেক্ট কররো এেিং কারেকশে র্হরসরে WiFi র্সরেক্ট করর র্েরো।

পরে ী উইরডার আমারের IDE র্েে ি
ার্ে করর েেরে। আমরা এখারে Arduino IDE র্েে ি
ার্ে করে। র্েে ি
ার্ে
কররে পরে ী উইরডার র্কোরে Arduino IDE ক Blynk োইরব্ররী ইন্সটে করর হরে কসটা কেখারো হরে।
আমরা কেখারো কেপ ফরো করর আমারের Arduino IDE এর কে রর Blynk Library ইন্সটে করর র্েই

পরে ী উইরডার এরকম একটট টযাে কেখারে কেখারে আমরা আমারের কাঙ্খি ককাডটট কপরয় োরো।
এখারে শুরুর আমরা কে ওয়াইফাই এর সারথ েুক্ত ার োম এেিং পাসওয়াডিটট র্েরখ র্েই। এরপর ককাডটট
ডাউেরোড করর কফর্ে।
1
2

ডাউেরোড করা
ককাডটট ওরপে
কররে আমরা
এরকম একটট ককাড
কেখর পারো।
এখারে োড়র্
করমন্টগুরো রাখা
হরয়রছ ক ামারের
ককাড কোঝার
সুর্েধারথ ি
ই। কসগুরো
র্ডর্েট করর র্েরে
এরকম কর্হারা
কেখারে। এখারে
মাকি করা েুই
জায়গায় েুই োইরের
ককাড এড করর র্েই
কেটার ফরে আমরা
ইন্টাররেরটর মাধযরম
কোরডির এেইর্ড
কররাে করর
পারে।
ককাডটট আপরোড
করর র্েই!

এোর আমরা ব্রাউজারর র্ফরর োই। এখারে Next এ র্িক কররে এরকম কেফারম ি
শে ঙ্খিে কেখারে কেখারে
Go To Device এ র্িক কররে পারশর ঙ্খিেটট কেখারে কেখারে আমরা কোরডির এেইর্ডটট োর্ুিয়াে সুইরর্র
মাধযরম র্েয়ন্ত্রে করর পাররো। একই সারথ এখারে আমরা কেখর পারো কে কোডিটট ক েণ ধরর র্ােু আরছ।
এোরে আমারের প্রথম IoT প্ররজক্টটট করর কফেোম!

Arduino Based Appliance Control

Circuit Diagram

IoT Based Appliance Control

Circuit Diagram

First, we need to edit the dashboard
1
2

To newly insert any wizard, we need to add a DataStream
for each individual appliance control
1
2

We need to set appropriate variable type for the DataStream
and Name it however we want
1
2

We can also edit the existing Datastreams by clicking on it.
Let’s give them all the appropriate name

This is how it looks after editing all the Data Streams

Now we can focus on web dashboard. We can drag and drop any
free widget at our convenience and resize them in anyways.

Now, we add two new widgets for controlling two
appliances simultaneously.

We can edit any widget by hovering mouse cursor to its
corner and then click settings
1
2

This widget indicates the
feedback status from device end.
We can select appropriate Data
Stream (according to code) and
Name it to our convenience

Do the same for Switch widget also!

After doing all the necessary steps,
the dashboard should look like this
Click “Save and Apply”

Arduino based Gas Leakage Detection

Circuit Diagram
2

Gas Leakage Monitoring in IoT

Circuit Diagram

Create a new Data Stream to use a new widget
This is because we can get maximum value
of 4095 in analog reading of JRC Board

Drag this widget to show the sensor data

We can do all sorts of
modification here!
Follow this guide to edit
the last widget we added
and then click save

We can also use chart widget
to accurately show sensor data
over time

Edit the widget
according to guideline

After clicking “Save and Apply” the
dashboard should look like this!
Pretty cool, right?

Fire Alarm with Arduino

Circuit Diagram

Fire Alarm with JRC Board

Circuit Diagram

Focus on this indicator widget for Fire
Alarm Indicator. We did not create any
new widget to avoid hassle!

Arduino Based Soil Moisture Testing

Circuit Diagram

Code
Go to your Code Folder,
then search for
“Arduino_Based_Soil_
Moisture_Monitoring”
and Open it

IoT Based Soil Moisture Monitoring

Circuit Diagram

Create a new Data Stream to use a new widget

Now we add a Slider widget to manually adjust
the trigger value for soil moisture sensor

Edit the widget
according to guideline

We added a relay to this system to activate pump which can be shown in Indicator_1
Soil Moisture value can be observed in Sensor Data and Chart
The trigger point to activate pump can be set in Adjustment Slider

Arduino Based Weather Monitoring

Circuit Diagram

IoT Based Weather Monitoring

Circuit Diagram

Create 2 New Data Streams for
Temperature and Humidity

Now we add two Gauge widget to see the
Temperature and Humidity Status

Change the two gauge's settings.

You can also edit the
DataStream of the Chart widget
to temperature to show the
timewise weather update

The dashboard should look like this

Arduino Based Distance Measurement
and Theft Detection

Circuit Diagram

IoT based Theft Notification

Circuit Diagram

Focus on this indicator widget for
Theft Alarm Indicator. The theft alarm
can only be turned off from Relay_2
switch. The distance can be shown in
Sensor Data

It’s Always YOU, who NEEDS to START!

Thank You.
Redwan Ferdous
https://redwanferdous.com
130
8/12/2023 ©FronTech Ltd. Contents from Internet for Knowledge Purpose.

Hands On Workshop on IoT: From Arduino to JRC Board

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