Published April 25, 2020 © GPL3+

Esp Data Transferring System

This esp controlled system can take data from the surroundings and send it in real time to a webpage.

BeginnerFull instructions provided965

Things used in this project

Hardware components

Seeed Studio Grove - Barometer Sensor (BMP280)

BH1750 light intensity sensor

NODE MCU ESP8266 12-E

Solderless Breadboard Half Size

Jumper wires (generic)

Male/Female Jumper Wires

9V battery (generic)

9V Battery Clip

USB-A to Micro-USB Cable

Software apps and online services

Arduino IDE

Fritzing

Arduino Web Editor

Story

This project uses the esp8266 node MCU board to transfer data from sensors attached to the board that use the i2c or two-wire interface for communication and sends the data to a web server of a fixed address every time you reset or restart the board. This can be used to monitor the surroundings of an unmanned vehicle or machine. Along with the given sensors, other sensors like the mq2 gas sensor can also be used. To work the esp board requires an active internet connection and 5 volts to 9 volts input voltage.

This is the final result and is accessible on your private network using the IP address in the code via chrome, Mozilla or Internet Explorer.

Code

CODE FOR THE PROJECT

#include <ESP8266WebServer.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BMP280.h>
#include <BH1750.h>
#define SEALEVELPRESSURE_HPA (1013.25)
IPAddress local_IP(192, 168, 10, 147  );
IPAddress gateway(192, 168, 10, 1);
IPAddress subnet(255, 255, 0, 0);
IPAddress primaryDNS(8, 8, 8, 8);   //optional
IPAddress secondaryDNS(8, 8, 4, 4); //optional
Adafruit_BMP280 bmp;
BH1750 lightMeter;
float temperature, lux, pressure;
const char* ssid = "Amit";  // Enter SSID here
const char* password = "keshariyaji19";  //Enter Password here


//change this with the pin that you use

ESP8266WebServer server(80);              
 
void setup() {
  Serial.begin(115200);
  delay(100);
   Wire.begin();
  bmp.begin(0x76);   
lightMeter.begin();

  Serial.println("Connecting to ");
  Serial.println(ssid);
  if (!WiFi.config(local_IP, gateway, subnet, primaryDNS, secondaryDNS)) {
    Serial.println("STA Failed to configure");
  }
  
  WiFi.begin(ssid, password);

  
  while (WiFi.status() != WL_CONNECTED) {
  delay(1000);
  Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected..!");
  Serial.print("Got IP: ");  Serial.println(WiFi.localIP());

  server.on("/", handle_OnConnect);
  server.onNotFound(handle_NotFound);

  server.begin();
  Serial.println("HTTP server started");

}
void loop()

{
  server.handleClient();
}

void handle_OnConnect() {
  temperature = bmp.readTemperature();
  pressure = bmp.readPressure() / 100.0F;
  lux = lightMeter.readLightLevel();
  server.send(200, "text/html", SendHTML(temperature,lux,pressure)); 
}

void handle_NotFound(){
  server.send(404, "text/plain", "Not found");
}

String SendHTML(float temperature,float lux ,float pressure){
  String ptr = "<!DOCTYPE html> <html>\n";
  ptr +="<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, user-scalable=no\">\n";
  ptr +="<title>Trijal's Environment Sensing Station</title>\n";
  ptr +="<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;background-color:red;}\n";
  ptr +="body{margin-top: 50px;} h1 {color:cyan ;margin: 50px auto 30px;}\n";
  ptr+= "p {font-size: 30px;color: violet ;margin-bottom: 20px;}\n";  ptr +="</style>\n";
  ptr +="</head>\n";
  ptr +="<body>\n";
  ptr +="<div id=\"webpage\">\n";
  ptr +="<h1>TRIJAL'S ENVIRONMENTAL STATION</h1>\n";
  ptr +="<p>Temperature: ";
  ptr +=temperature;
  ptr +="&deg;C</p>";
  ptr +="<p>Light Intensity: ";
  ptr +=lux;
  ptr +="lux</p>";
  ptr +="<p>Pressure: ";
  ptr +=pressure;
  ptr +="hPa</p>";
  ptr +="</div>\n";
  ptr +="</body>\n";
  ptr +="</html>\n";
  
return ptr;
  }