Weather Station using NodeMCU (ESP8266):
We built an IoT based weather station which can monitor various environmental parameters such as temperature, humidity..
This can be done by reading various sensor's data using NodeMCU and uploading them to the Thingspeak Dashboard.
Components Required
- NodeMCU
- DHT11 sensor
- BMP180 sensor
- Breadboard
- Jumper Wires
Code:
#include <ESP8266WiFi.h>
#include "DHT.h"
#include <SFE_BMP180.h>
#include <Wire.h>
#define ALTITUDE 431.0
#define DHTPIN 0 // what digital pin we're connected to
#define DHTTYPE DHT11 // DHT 11
SFE_BMP180 pressure;
DHT dht(DHTPIN, DHTTYPE);
const char* ssid = "iotianhub"; // Your ssid
const char* password = "iotianhub"; // Your Password
char status;
double T,P,p0,a;
WiFiServer server(80);
void setup() {
Serial.begin(115200);
delay(100);
dht.begin();
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 is connected");
server.begin();
Serial.println("Server started");
Serial.println(WiFi.localIP());
if (pressure.begin())
Serial.println("BMP180 init success");
else
{
Serial.println("BMP180 init fail\n\n");
while(1); // Pause forever.
}
delay(1000);
}
void loop() {
status = pressure.getPressure(P,T);
if (status != 0)
{
p0 = pressure.sealevel(P,ALTITUDE); // we're at 1655 meters (Boulder, CO)
Serial.print("relative (sea-level) pressure: ");
Serial.print(p0,2);
Serial.print(" mb, ");
}
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
// Read temperature as Fahrenheit (isFahrenheit = true)
float f = dht.readTemperature(true);
WiFiClient client = server.available();
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close"); // the connection will be closed after completion of the response
client.println("Refresh: 10"); // update the page after 10 sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("<style>html { font-family: Cairo; display: block; margin: 0px auto; text-align: center;color: #333333; background-color: #ccffb3;}");
client.println("body{margin-top: 50px;}");
client.println("h1 {margin: 50px auto 30px; font-size: 50px; text-align: center;}");
client.println(".side_adjust{display: inline-block;vertical-align: middle;position: relative;}");
client.println(".text1{font-weight: 180; padding-left: 15px; font-size: 50px; width: 170px; text-align: left; color: #3498db;}");
client.println(".data1{font-weight: 180; padding-left: 80px; font-size: 50px;color: #3498db;}");
client.println(".text2{font-weight: 180; font-size: 50px; width: 170px; text-align: left; color: #ff6600;}");
client.println(".data2{font-weight: 180; padding-left: 150px; font-size: 50px;color: #ff6600;}");
client.println(".text3{font-weight: 180; padding-left: 15px; font-size: 50px; width: 170px; text-align: left; color: #0066ff;}");
client.println(".data3{font-weight: 180; padding-left: 80px; font-size: 50px;color: #0066ff;}");
client.println(".data{padding: 10px;}");
client.println("</style>");
client.println("</head>");
client.println("<body>");
client.println("<div id=\"webpage\">");
client.println("<h1>ESP Weather Station server</h1>");
client.println("<div class=\"data\">");
client.println("<div class=\"side_adjust text1\">Humidity:</div>");
client.println("<div class=\"side_adjust data1\">");
client.print(h);
client.println("<div class=\"side_adjust text1\">%</div>");
client.println("</div>");
client.println("<div class=\"data\">");
client.println("<div class=\"side_adjust text2\">Temperature:</div>");
client.println("<div class=\"side_adjust data2\">");
client.print(t);
client.println("<div class=\"side_adjust text2\">*C</div>");
client.print(f);
client.println("<div class=\"side_adjust text2\">F</div>");
client.println("</div>");
client.println("<div class=\"data\">");
client.println("<div class=\"side_adjust text3\">Pressure:</div>");
client.println("<div class=\"side_adjust data3\">");
client.print(p0,2);
client.println("<div class=\"side_adjust text3\">mb</div>");
client.println("</div>");
client.println("</div>");
client.println("</body>");
client.println("</html>");
delay(4000);
}
