Nancyvarkey at 13:33, 2 January 2020

2020-01-02T13:33:27Z

Nirmala Venkat: Created page with " {| style="border-spacing:0;" | style="background-color:#d9d2e9;border-top:1.5pt solid #000000;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:n..."

2019-12-20T07:22:00Z

Created page with " {| style="border-spacing:0;" | style="background-color:#d9d2e9;border-top:1.5pt solid #000000;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:n..."

New page

{| style="border-spacing:0;"
| style="background-color:#d9d2e9;border-top:1.5pt solid #000000;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| '''Visual Cue'''
| style="background-color:#d9d2e9;border:1.5pt solid #000000;padding:0.176cm;"| '''Narration'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 1:
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| Welcome to the '''Spoken Tutorial''' on '''Analog to Digital Conversion '''using''' Arduino.'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 2:

Learning objectives

| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| In this tutorial, we will learn about :

* '''ADC i.e. Analog to Digital Conversion'''
* '''ADC pins''' in Arduino
* '''ADC Resolution'''
* '''DHT11 Temperature and Humidity''' sensor
* '''Serial Monitor '''and''' Serial Plotter'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 3:

Pre-requisites
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| To follow this tutorial, you should have a basic knowledge of:

* '''Electronics''' and
* '''C or C++''' programming language

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 4:

System Requirement
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| To record this tutorial, I am using:

* '''Arduino Uno''' board
* '''Ubuntu Linux 16.04 OS'''
* '''Arduino IDE'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 5:

External Components Required
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| We require few '''external components''' such as

* '''DHT11''' sensor
* Breadboard
* '''Jumper wires'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Narration only
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| In this tutorial, we will detect the temperature and humidity using '''DHT11 sensor.'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 6:

Image '''DHT11_pin.jpg'''
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| This sensor collects analog values and gives it to '''Arduino Uno'''.

'''Arduino ADC''' pins will convert these analog values to digital values.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Narration
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| Next, we will understand the concept of''' resolution.'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 7:

Image '''ADC_Resolution.png'''
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| * '''Arduino Uno''' has'' '''''10-bit resolution'''.<br/>

This means, it can detect (2 to the power of 10) i.e. '''1024 discrete analog levels.'''

* '''Resolution''' is the '''smallest change''' that can be measured
* Arduino gives 5V output voltage, so 5V divided by 1024 levels gives '''4.89mV.'''
* That means, '''Arduino Uno '''can be '''sensitive''' to a '''minimal change of 4.89mV.'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 8:

Image '''DHT11_Interface.png'''

Point to the image as per narration
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| This shows the circuit connection for '''DHT11''' with '''Arduino'''.

* '''Arduino Uno''' has '''6 '''built-in''' ADC channels''' ('''A0 to A5''').
* '''ADC channels''' read analog signal in the range of '''0-5V.'''
* '''Pin 1 '''of the '''DHT11 sensor '''is connected to 5V pin of '''Arduino'''.
* '''Pin 2 '''of the '''DHT11 sensor''' is''' '''the''' Data''' pin.
* This''' Data pin '''of the sensor is connected to''' analog pin A0 '''of '''Arduino'''.
* '''Pin 3 '''of the '''DHT11 sensor''' is connected to the ground''' '''pin of the '''Arduino'''.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 9:

Image '''Setup_Connection.jpg'''
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| This is the''' live setup''' of the connection, as shown in the circuit diagram.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Open '''Arduino IDE.'''
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| Now we will write the program in''' Arduino IDE.'''

Open '''Arduino IDE.'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| narration
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| First we need to download the''' DHT11 arduino library''' to run this program.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| '''Click Sketch => Include Library => Manage Libraries'''
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| Click on '''Sketch''' menu in the menu bar.

Select '''Include Library''' and then click on '''Manage Libraries''' option.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| In the search tab, type DHT11
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| A new window will appear.

In the top right corner, we can see a search tab.

Here, type '''DHT11''' and press Enter.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Select '''SimpleDHT''' by '''Winlin.'''

Click on version drop down box

Click on '''install''' button
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| We can see various libraries for''' DHT11 sensor.'''

Scroll down to the bottom of the screen and select '''SimpleDHT''' by '''Winlin.'''

In the '''version''' drop down box, we can select the latest version of the library.

Click on '''install''' button to install the library.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Click on the Close button
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| The '''DHT11''' library is now installed in the '''Arduino IDE'''.

Click on the '''Close''' button at the right bottom of the window.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Click on the '''Sketch >>''' '''Include Library'''
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| Let us add this library to the program.

Click on the '''Sketch '''menu and select '''Include Library.'''

Newly downloaded library usually appear at the end.

So scroll down to the bottom of the list and select '''SimpleDHT.'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| '''Point to the header file'''

<nowiki>#include <SimpleDHT.h></nowiki>
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| We can see the header file''' SimpleDHT.h '''added''' '''in the code window.
|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| int pinDHT11 = A0;

SimpleDHT11 dht11(pinDHT11);

| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| Type the code as shown.

Here we have initialized the data pin of '''DHT11 sensor''' which is connected to '''A0.'''

This command creates a '''DHT''' object.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| void setup()

{

Serial.begin(9600);

delay(500);

Serial.println("DHT11 Humidity & Temperature Sensor\n\n");

delay(1000);

}

| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| Inside '''void setup''' function, type the code as shown:

'''Serial.begin()''' function initiate the serial communication.

It sets the '''data rate''' in''' bits per second''' for '''serial data transmission.'''

9600 represents the baud rate.

'''delay(500)''' is the delay time for the sensor to boot.

'''Serial.print''' command prints the header as specified here.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| void loop()

{

byte temperature = 0;

byte humidity = 0;

dht11.read(pinDHT11, &temperature, &humidity, NULL);

Serial.print(" Temperature & Humidity : ");

Serial.print((int)temperature);

Serial.print(" *C ");

Serial.print((int)humidity);

Serial.println(" % H");

delay(2000);

}
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| Now we will write the code for '''void loop.'''

We have created two variables '''temperature''' and '''humidity''' for '''DHT sensor''' output.

'''dht11.read,''' reads the data from the sensor.

It stores the result in '''microcontroller’s register.'''

These lines prints the temperature in degrees celsius and humidity in percentage.

'''delay(2000)''' updates the current humidity and temperature readings every''' 2 seconds.'''

This code is available in the code files link of this tutorial

You can download and use it.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Click on compile and upload button on the toolbar

| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| '''Click''' on the''' compile''' button to verify your''' program.'''

A pop up window will appear to save the current program.

Save the program as '''DHT11.'''

Now click on '''upload''' button to upload the current '''program''' on''' Arduino.'''
|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Point to the output in the video

Serial Monitor
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| We will see the output in the '''Serial monitor screen.'''

For this, click on the''' Tools '''menu and select '''Serial monitor.'''

The serial monitor window opens.

Temperature and humidity of the current place is displayed as expected.

Close the window.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Go to '''Arduino IDE'''.

| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| Next we will see the output in the serial plotter.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Type double slash
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| Let us modify the program.

Comment the line '''Serial.print( “Temperature & Humidity :”);''' as shown.

This will not print the text '''Temperature''' and '''Humidity'''.

For plotting, we require only the values of temperature and humidity.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Click upload
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| Let us upload the current program to see the results on serial plotter.

Click on the''' tools menu''' and select '''serial plotter. '''

The '''serial plotter''' window opens.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Point to the output
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| We can see two lines simultaneously plotting the points.

The blue line indicates the temperature which is around 28 to 30 *C

The red line is the humidity reading which is near to 45%.

The readings will vary depending upon where the experiment is done.

Now cover the sensor with your hands and you will see the fluctuating readings.

Close the window.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 10:

Features of DHT11
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| * It is useful for '''humidity''' readings between '''20%-80% '''with''' ∓5%''' '''RH i.e.''' '''(Relative Humidity)'''
* It is useful for''' temperature '''readings between''' 0-50°C '''with''' ∓2 °C'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"|
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| This brings us to the end of this tutorial. Let us summarize.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 11:

Summary
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| In this tutorial, we learnt about:

* '''ADC i.e. Analog to Digital Conversion'''
* '''ADC pins''' in '''Arduino'''
* '''ADC Resolution'''
* '''DHT11 Temperature and Humidity''' sensor
* '''Serial Monitor '''and''' Serial Plotter'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 12:

Assignment
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| As an assignment:

# Raise an alarm by glowing the built in '''LED''' '''pin 13''' of the '''Arduino'''
# Modify the above existing code.
#:'''Hint: '''
# Use '''If-else '''statement.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 12(B):

Assignment
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"|

# Add 1 or 2 deg C to the temperature value that you get on the serial monitor.
# To increase the temperature reading, cover the '''DHT11 sensor '''with your hands.
# Refer to the '''Assignment''' link of this tutorial for the source code.

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 13:

About Spoken Tutorial Project

*
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| The video at the following '''link''' summarizes the '''Spoken Tutorial Project'''

Please '''download''' and watch it

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 14:

Spoken-Tutorial Workshop

*

| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| The '''Spoken Tutorial Project''' Team:

* Conducts '''Workshops''' &
* Gives Certificates

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 15:

Forum for specific questions
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| Please post your timed queries in this '''forum'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"| Slide 16:

Acknowledgement

| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| '''Spoken Tutorial Project''' is funded by''' MHRD, Government of India'''

|-
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:none;padding:0.176cm;"|
| style="border-top:none;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:1.5pt solid #000000;padding:0.176cm;"| This tutorial has been contributed by '''FOSSEE''' and Spoken Tutorial Project, IIT Bombay.

And this is''' Saurabh''' signing off.

Thanks for joining.

|}

Arduino/C2/Analog-to-Digital-Conversion/English - Revision history

Nancyvarkey at 13:33, 2 January 2020

Nirmala Venkat: Created page with " {| style="border-spacing:0;" | style="background-color:#d9d2e9;border-top:1.5pt solid #000000;border-bottom:1.5pt solid #000000;border-left:1.5pt solid #000000;border-right:n..."