Nirmala Venkat at 07:57, 22 February 2021

2021-02-22T07:57:17Z

Nirmala Venkat at 10:01, 18 February 2021

2021-02-18T10:01:14Z

Nancyvarkey at 02:59, 30 January 2021

2021-01-30T02:59:18Z

Nirmala Venkat: Created page with " {| border="1" |- || Visual Cue || Narration |- || Slide 1: || Welcome to the''' '''Spoken Tutorial on '''Sending data to the cloud using IoT devices.''' |- ||Slide 2: Learni..."

2021-01-21T09:18:31Z

Created page with " {| border="1" |- || Visual Cue || Narration |- || Slide 1: || Welcome to the''' '''Spoken Tutorial on '''Sending data to the cloud using IoT devices.''' |- ||Slide 2: Learni..."

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{| border="1"
|-
|| Visual Cue
|| Narration
|-
|| Slide 1:
|| Welcome to the''' '''Spoken Tutorial on '''Sending data to the cloud using IoT devices.'''
|-
||Slide 2:
Learning Objectives

|| In this tutorial, we will learn how to
* Establish connection between '''ESP8266-01''' and '''DHT11 '''sensor
* Collect '''Temperature''' and '''Humidity''' values given by '''DHT11''' sensor
* Use '''ThingSpeak''' platform to store and visualize sensor readings and
* Download the data in '''CSV''' file
|-
||Slide 3:

Pre-Requisites
||To follow this tutorial, you should have a basic knowledge of:

* '''Wireless Communication '''
* '''C or C++ '''programming language
* '''ThingSpeak''' account and
* Write '''API''' Key

If not, then go through the relevant '''Arduino''' spoken tutorials on this website.
|-
||Slide 4:

System Requirements
||To record this tutorial, here I am using:
* '''Ubuntu Linux 16.04''' OS
* '''Arduino UNO''' board
* '''Arduino IDE'''
|-
||Slide 5:

External Components
DHT11.jpg

MB102 Power Supply.jpg
||We also require some external components such as
* '''DHT11 Sensor'''
* '''MB102 Breadboard Power Supply Module'''
|-
||ESP8266-01 WiFi Module.jpg

Point to Tx Rx
|| * '''ESP8266-01 WiFi Module'''
Recall that we have learnt about the pins of '''ESP8266-01 WiFi '''module in the earlier tutorial.
* This wifi module is widely used for the development of '''IoT '''applications.
* It has a built-in '''System on Chip''' with integrated '''TCP/IP stack.'''
|-
||Slide 6:
MQTT Protocol
|| * We will be using the '''MQTT''' protocol to send data over the network.
* MQTT stands for '''Message Queuing Telemetry Transport.'''
* It is a simple messaging protocol, designed for devices with low bandwidth.
* We can read and publish data from sensors on the cloud.
|-
||
||We will see the circuit connection of''' DHT11 '''and''' WiFi '''module with '''Arduino'''.
|-
||Image '''DHT-Arduino.png'''
Image '''Data Pin-GPIO2.png'''
|| * Connect the '''VCC '''pin of the '''DHT11''' sensor to the 5V''' '''pin of Arduino.
* Connect the '''ground '''pin of the '''DHT11''' sensor to the ground pin of Arduino.
* Connect '''Data pin''' of '''DHT11''' sensor to '''GPIO2''' of '''ESP8266''' Module.
Note:
The '''ESP8266''' module works on 3.3V only.
Connecting it to 5V may '''damage''' the''' Wi-Fi''' module.
|-
||
|| Next we will see how to set up the''' MB102 '''module on Breadboard.
|-
||'''MB102 folder:'''
MB102_setup1.jpg
||We need to use the 3.3V supply to power up the '''wifi''' module.

Make sure that the yellow coloured jumpers in the module are fixed on the 3.3V and '''OFF''' Pins.
|-
|| MB102_setup2.jpg
|| Keep the white button of the module towards the right side of the breadboard as shown in the image.
|-
||

MB102_setup3.jpg

MB102_setup4.jpg
||There are pins in pairs at the bottom of the '''MB102''' module.

Place these pins of the module on the power rails of the breadboard as shown in the image.
|-
||
MB102_setup5.jpg
||We can see a power jack point on the '''MB102''' module.
Plug in a '''9V-1A''' adapter in this power jack.
|-
|| MB102_setup6.jpg
|| To turn ON or OFF the '''MB102''' module, we have to press the white button.
|-
|| MB102_setup7.jpg
||When the green light is turned on, it means the module is switched on.

Now the setup of the '''MB102''' module is completed.
|-
||
|| Let us see the other circuit connections.
|-
||Image '''ESP-Power Supply Module 3.3V.png'''
Image '''ESP-Power Supply Module GND.png'''
Image '''RST-GND.png'''
Image '''GPIO0-GND.png'''
Image '''Rx-Tx Connection.png'''
|| * Connect '''VCC and CH_PD''' pins of '''ESP8266''' to 3.3V pin of '''MB102 power supply module'''.
* Connect '''GND''' pin of '''ESP8266''' to '''ground''' pin of '''MB102 '''power supply module.
* Connect the '''RST''' pin of '''ESP8266''' module to one end of the '''push button'''.
* This push button is used for resetting the '''WiFi''' module.
* Connect the other end of the push button to the '''ground '''terminal of '''Arduino'''
* Connect GPIO pin 0 of '''ESP8266''' module to ground.
* Connect the '''Tx pin''' of '''ESP8266''' to the '''Tx pin''' of the Arduino.
* Connect the '''Rx pin''' of '''ESP8266''' to the''' Rx pin''' of the Arduino.

|-
||Slide 9:

Live Setup
|| This is the live setup of the connection, as shown in the circuit diagram.
|-
||

|| Now we will write the program in '''Arduino IDE''' for interfacing '''WiFi module '''and''' DHT11 Sensor.'''
|-
||Slide:

Code Files:
||
* Thefiles used in this tutorial are available in the'''Code Files '''link on this tutorial page.
* Please download and extract them
* Make a copy and then use them while practising
|-
|| Open Arduino IDE
|| Open '''Arduino IDE'''.
|-
|| Narration
|| Connect your Arduino board to your PC.
|-
||

Go to the Tools menu. Select '''port''' option.
Tools => Port.
||First, we need to know the name of the port to which arduino is connected.
In the menu bar, go to the '''Tools''' menu. Select '''port''' option.
In my case, the port is '''ttyUSB0. '''Note down your port name.
Windows users can skip the steps below as the port is detected automatically.
|-
|| Open the'''terminal'''
|| Open the'''terminal''' by pressing'''Ctrl+Alt+t''' keys simultaneously.
|-
||

Type,'''sudo chmod a+rw /dev/ttyUSB0'''
||Type, '''sudo space chmod space a+rw space slash dev slash ttyUSB0'''
In my case, the '''port''' name is '''ttyUSB0'''
You have to specify your '''port''' name.
Press '''Enter'''.
Enter your '''password''' for the '''system''' and press '''Enter'''.
The above '''command''' gives '''read-write permission''' to the '''USB port.'''
|-
|| Switch back to arduino IDE
|| Switch back to '''Arduino IDE.'''
|-
||Click File => Preferences

||Next we will configure the '''ESP8266 module''' to communicate.

Click on the '''File''' menu. Select '''Preferences'''.
A new window will appear.
In the '''Settings''' tab, go to the '''Additional Boards Manager URLs '''section.
Add this '''json''' '''URL'''.
This will help to download '''ESP8266 WiFi module '''in''' Arduino IDE.'''

Click on the '''OK''' button at the bottom of the window.
|-
||Click Tools => Board => Boards Manager
||In the menu bar, click on the '''Tools''' menu and select '''Board'''.
Then select the '''Board Manager''' option.
A new window will appear.
In the top right, we can see a '''search tab'''.
Here, type '''ESP8266''' and press enter.
|-
||Select ESP8266 Community Module
Click on version drop down box
Click on '''install''' button
||Select '''ESP8266 by ESP8266 Community'''.

In the version drop down box, select the '''latest version '''of the module.

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

Installation will take few minutes to complete.

Wait until it is installed successfully.
|-
||Point to Installed button

Click on the Close button
||The '''ESP8266''' module is now installed in the '''Arduino IDE'''.

Click on the '''Close''' button at the right bottom of the window.
|-
||
|| Next, we need to download a''' DHT sensor''' library to successfully run the code.
|-
||Download Following Library in Arduino IDE.
||Click on the '''Sketch''' option.

Select '''Include Library''' and then click on '''Manage Libraries'''.
A new window will open.

Type '''Simple DHT''' on the search box.

Select the latest version and install the '''Simple DHT by Winlin'''.
|-
||
||Make sure that the above steps are done successfully before proceeding further.
Click on the '''Close''' button at the right bottom of the window.
|-
||
|| Type the code as shown.
|-
||#include <SimpleDHT.h>
#include <WiFi.h>
String apiKey = "N9FEWDVPBUFUII32";

||We have included the '''DHT and ESP8266 '''libraries to the code.

Here, we have to enter our channel '''Write API key '''which we generated already.
|-
||char *ssid = "Pratik";
char *pass = "Pratikjb@";
char* server = "api.thingspeak.com";

||'''SSID''' is the '''name''' of the '''Wi-Fi''' module.

Pass is the '''passcode '''to join the '''Wi-Fi''' network

You have to give a unique ssid and password.

This is the Thingspeak api server, where we will be uploading the data.
|-
||#define pinDHT11 2

SimpleDHT11 dht11(pinDHT11);

WiFiClient client;

||Define the data pin of '''DHT11''' sensor connected to '''ESP8266''' module as shown here.
This code sets the DHT11 data pin.
This line of code creates a client to the specified IP address or server.
|-
||void setup()

{

Serial.println("");

Serial.println("WiFi connected");

}

||Type this code in the void setup function.

Here, the baud rate is set to 115200 as the WiFi module works on 115200 baud rate.

The connection is established with the '''ssid''' and password which we declared earlier.

We will establish a connection between '''ThingSpeak server '''and''' ESP8266 WiFi module. '''

|-
||
||Type this code in the void loop function.

We have declared two variables for humidity and temperature.

This will read the temperature and humidity values.

First check whether the connection is established between the '''ThingSpeak cloud and WiFi module.'''

Then the data including humidity, temperature and API keys will be sent to the server.

Based on the API key value, the ThingSpeak server automatically selects the channel.

This prints the data on the '''ThingSpeak''' server where the WiFi module will be connected.

We are done with the required coding.
|-
||Click on the compile button to save the program

||Let us compile and save the program.

Click on the''' compile''' button to verify the''' program.'''

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

Name the program as '''DHT11_IoT '''and click on the save button to save the program.
|-
||Tools => Board => Generic ESP8266 Module

Select ESP8266 module to upload the program.
||Now, before uploading the program we have to select the '''ESP8266''' module.

Click on the '''Tools''' option and select '''board'''.

Scroll down and select '''Generic ESP8266 Module'''.
|-
|| Tools => Reset Method = no dtr (aka ck).
||Next step is to select the '''Reset''' option.

In the menu bar, select '''Tools'''. Go to the Reset''' Method'''.

Select '''no dtr (aka ck).'''

This will help to reset the wifi module manually.
|-
|| Tools => Builtin LED = 1
||Next we need to set the built in LED of '''ESP8266 Module'''.
Again select '''Tools'''.
Go to the '''Builtin LED '''option. Set the''' Builtin LED''' to '''1.'''
|-
||Click on the upload button

||Now click on the upload button to upload the current program on''' ESP8266-01. '''
We can see the program getting uploaded at the bottom of the screen.
Now the program has been uploaded successfully.
|-
||Rx-Tx Connection.png
|| After Uploading the code, disconnect the '''GPIO pin 0''' of '''ESP8266''' module from ground.
|-
||Slide:

Working of '''ThingSpeak''' channel
||
* First, the DHT11 module will get connected to the WiFi network.
* It will read temperature and humidity data from the sensor.
* After a few seconds, these values will be uploaded to '''ThingSpeak''' channel
|-
||
||Let's see the output on our channel created on '''ThingSpeak'''.

Go to the '''ThingSpeak''' page.

We can see a graph of temperature and humidity values from the DHT11 sensor.
|-
||
|| Next, we will see how to export the current data of''' DHT11''' sensor.
|-
||

Download the Data in CSV file
||Click on the '''Data Import/Export''' option on the GUI of your channel.
Scroll down to see the '''Export''' option on the left side
Select the time zone as shown here
Now Click on '''Download''' button
Click on the save button.
|-
||
||Let us open the downloaded CSV file.
Go to the '''Downloads''' folder and open the '''CSV''' file.
This is the temperature and humidity data that is collected from the sensor.
|-
||Slide 10:CSV File

||
* With the '''ThingSpeak''' platform, it is possible to fetch the device reading in CSV file.
* This is useful to do data analytics using R or Matlab.
* Go through the R Spoken tutorials for data analytics.

|-
||
|| This brings us to the end of this tutorial. Let us summarize.
|-
||Slide 11:

Summary
||In this tutorial, we learnt to:
* Establish connection between '''ESP8266-01''' and '''DHT11 sensor'''
* Collect '''Temperature''' and '''Humidity''' values given by '''DHT11''' Sensor
* Use '''ThingSpeak''' platform to store and visualize sensor readings and
* Download the data in '''CSV''' file

|-
||Slide 12:

About Spoken Tutorial project
||The video at the following link summarizes the Spoken Tutorial project.
Please download and watch it.
|-
||Slide 13:

Spoken Tutorial workshops
||The''' Spoken Tutorial Project''' Team:* conducts workshops and
* gives certificates.
For more details, please write to us.
|-
||Slide 14:

Forum for specific questions
|| Please post your timed queries in this forum.
|-
||Slide 15:

Acknowledgement
|| The Spoken Tutorial project is funded by MHRD, Government of India.
|-
||
||This tutorial has been contributed by FOSSEE and Spoken Tutorial Project, IIT Bombay.

This is Saurabh signing off.

Thanks for watching.
|-
|}

← Older revision		Revision as of 10:01, 18 February 2021
Line 457:		Line 457:

	Go to the '''Downloads''' folder and open the '''CSV''' file.		Go to the '''Downloads''' folder and open the '''CSV''' file.
		+
		+	Click on the OK button at the bottom of the window.

	This is the '''temperature''' and '''humidity data''' that is collected from the '''sensor'''.		This is the '''temperature''' and '''humidity data''' that is collected from the '''sensor'''.

@@ Line 174: / Line 174: @@
 Code Files:
 ||
-* The files used in this tutorial are available in the'''Code files '''link on this tutorial page.
+* The files used in this tutorial are available in the '''Code files '''link on this tutorial page.
 * Please download and extract them
 * Make a copy and then use them while practising

Arduino/C3/Sending-data-to-the-cloud-using-IoT-devices/English - Revision history

Nirmala Venkat at 07:57, 22 February 2021

Nirmala Venkat at 10:01, 18 February 2021

Nancyvarkey at 02:59, 30 January 2021

Nirmala Venkat: Created page with " {| border="1" |- || Visual Cue || Narration |- || Slide 1: || Welcome to the''' '''Spoken Tutorial on '''Sending data to the cloud using IoT devices.''' |- ||Slide 2: Learni..."