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How to Upload Sensor Data to Cloud - ThingSpeak

Siva Rama Krishna September 29, 2019 NodeMcu(ESP8266) - WiFi Projects No comments :

This project focuses on transforming your NodeMCU into a gateway device, facilitating the uploading of sensor data to the ThingSpeak server. This tutorial provides instructions for users to gauge ambient temperature and humidity, with the recorded values transmitted to a personal cloud server on ThingSpeak every 15 seconds. This enables users to visualize both sets of data on a web page. To accomplish data transmission to ThingSpeak using a NodeMCU, it is essential to have a NodeMCU with network connectivity. Additionally, ThingSpeak necessitates a user account and the creation of a channel, which serves as the destination for sending and storing data.

Requirements:

NodeMcu-12E (ESP8266)
DHT-11
Jumper Wires

Connection Diagram:

How to Upload Sensor Data to Cloud - ThingSpeak, Making your NodeMCU as a gateway device for uploading your sensor data on ThingSpeak server. This tutorial allows the user to measure the surrounding temperature and humidity, measured values are sent to a personal cloud server in Thingspeak for every 15 seconds , so you will be able to see both visualization in a web page.

How to Add NodeMcu -12E(ESP8266) Board to Arduino IDE

Sign Up For ThingSpeak:

Visit https://thingspeak.com/ and create an account.

Generate a new channel, and subsequently, navigate to API keys. Copy the API key and paste it into your program.

How to create ThingSpeak account and Channels

Code:

#include <ESP8266WiFi.h>

#include <DHT.h>

#define DHTPIN D2

#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);

const char* ssid = " Your Wi-Fi Network name"; // replace with your Wi-Fi ssid

const char* password = " Wi-Fi Network Password ";

const char* host = "api.thingspeak.com";

const char* privateKey = " Your thingSpeak API Key"; / Enter your Write API key from ThingSpeak

void setup() {

Serial.begin(115200);

delay(10);

// We start by connecting to a WiFi network

Serial.println();

Serial.print("Connecting to ");

Serial.println(ssid);

WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) {

delay(500);

Serial.print(".");

}

Serial.println("");

Serial.println("WiFi connected");

Serial.println("IP address: ");

Serial.println(WiFi.localIP());

}

float value, temp;

void loop() {

delay(15000);

float h = dht.readHumidity();

float t = dht.readTemperature();

Serial.print("connecting to ");

Serial.println(host);

// Use WiFiClient class to create TCP connections

WiFiClient client;

const int httpPort = 80;

if (!client.connect(host, httpPort)) {

Serial.println("connection failed");

return;

}

// We now create a URL for the request

String url = "/update";

url += "?api_key=";

url += privateKey;

url += "&field1=";

url += t;

url += "&field2=";

url += h;

Serial.print("Requesting URL: ");

Serial.println(url);

// This will send the request to the server

client.print(String("GET ") + url + " HTTP/1.1\r\n" +

"Host: " + host + "\r\n" +

"Connection: close\r\n\r\n");

delay(10);

// Read all the lines of the reply from server and print them to Serial

while(client.available()){

String line = client.readStringUntil('\r');

Serial.print(line);

}

Serial.println();

Serial.println("closing connection");

}
Output:

Open your Thingspeak account and click on channel private view, output will be shown as graph.

This tutorial allows the user to measure the surrounding temperature and humidity, measured values are sent to a personal cloud server in Thingspeak for every 15 seconds , so you will be able to see both visualization in a web page. In order to send data to ThingSpeak using a Node MCU, you need an NodeMCU with network connectivity. ThingSpeak requires a user account and a channel. A channel is where you can send data and stores data.

How to create Cloud - ThingSpeak account and Channels

Siva Rama Krishna August 24, 2019 NodeMcu(ESP8266) - WiFi Projects No comments :

ThingSpeak Cloud Platform

To utilize ThingSpeak for cloud computing, you have two options: either create a new MathWorks account or log in using an existing MathWorks account.

1.Sign up for ThingSpeak

Fill the Details and Click On Continue Button as show in below fig..

To start using ThingSpeak you must create a new MathWorks account, or, click cancel and log in using an existing MathWorks account.Fill the Details and Click On Continue Button.

You will get mail from service@mathworks.com. Open your Email and click on verify your Email.

To start using ThingSpeak you must create a new MathWorks account, or, click cancel and log in using an existing MathWorks account.

Click OK to login to ThingSpeak account.

2. Click Channels >> MyChannels

Collect data in a ThingSpeak channel from a device, from another channel, or from the web.

3. On the Channels page, click New Channel

4. Check the boxes next to Fields 1 & 2. Enter these channel setting values:

Name: Weather Monitoring

Field 1: Temperature

Field 2: Humidity

On the Channels page, click New Channel, Check the boxes next to Fields 1 & 2. Enter these channel setting values: Name: weather Monitoring Field 1: Temperature Field 2: Humidity

5.Click "Save Channel" at the bottom of the settings.

You now see these tabs:

Private View: This tab displays information about your channel that only you can see.

Public View: If you choose to make your channel publicly available, use this tab to display selected fields and channel visualizations.

Channel Settings: This tab shows all the channel options you set at creation. You can edit, clear, or delete the channel from this tab.

Sharing: This tab shows channel sharing options. You can set a channel as private, shared with everyone (public), or shared with specific users.

API Keys: This tab displays your channel API keys. Use the keys to read from and write to your channel.

Data Import/Export: This tab enables you to import and export channel data.

6. API Keys Settings

Write API Key: Use this key to write data to a channel. If you feel your key has been compromised, click Generate New Write API Key.

Read API Keys: Use this key to allow other people to view your private channel feeds and charts. Click Generate New Read API Key to generate an additional read key for the channel.

Note: Use this field to enter information about channel read keys. For example, add notes to keep track of users with access to your channel.

API Keys Settings Write API Key: Use this key to write data to a channel. If you feel your key has been compromised, click Generate New Write API Key. Read API Keys: Use this key to allow other people to view your private channel feeds and charts. Click Generate New Read API Key to generate an additional read key for the channel. Note: Use this field to enter information about channel read keys. For example, add notes to keep track of users with access to your channel.

API Requests

API Requests are used to Write and Read data from the Cloud platform.
Write API Requests is to upload sensor data to Channel.
Read API Requests is to Retrieve sensor data from Channel.

Output

After uploading data from the sensor using hardware modules like NodeMcu(ESP8266) Wi-Fi are raspberry pi output will be like this.

How to Add NodeMcu (ESP8266) Board to Arduino IDE

Siva Rama Krishna August 21, 2019 NodeMcu(ESP8266) - WiFi Projects No comments :

The NodeMCU board is not initially available in the Arduino IDE by default. To program your NodeMCU or ESP8266 board using the Arduino IDE, follow the steps below:

The NodeMCU ESP8266 is a low-cost WiFi module built by Espressif Systems.

Requirements

Arduino IDE in your PC
Internet connection
NodeMCU (ESP8266 ) Board

Step 1: Adding ESP8266 URL to Arduino IDE

Open your Arduino IDE. To Add additional URL for board manager.

Go to File >> Preferences

Open your Arduino IDE and go to file and click on Preferences to add additional board to your Arduino IDE board manager.

Paste below url in Additional Board Manager URLs as Shown below fig.

http://arduino.esp8266.com/stable/package_esp8266com_index.json

Open your Arduino IDE and go to file and click on Preferences and add additional board manager url in url box.

Now Click OK.

Step 2: Open Board Manager

Go to Tools >> Board: >> Board Manager

Search and Install NodeMCU(ESP8266) in Arduino IDE as shown in below fig.

Search for ESP8266 in search box.

Search and Install NodeMCU(ESP8266) in Arduino IDE Board Manager

Select esp8266 by ESP8266 Community.

(If internet is not available then you will not find ESP8266)

Click on Install Button. Download progress starts.

If your facing any errors while installation on progress try again after few hours.

If your installation is finished Refresh or Restart your PC.

Step 3: Verify installation of ESP8266

Go to Tools>>Boards>> select NodeMCU Board

Connect your USB cable to PC and Select Com port.

Upload example code to check is it working.

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