init code
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Weather.c.ino
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194
Weather.c.ino
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#include <Adafruit_BMP280.h>
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#include <ESP8266WiFi.h>
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#include <WiFiClient.h>
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#include <ESP8266WebServer.h>
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#include "DHT.h"
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#include <SPI.h>
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#include "proj_password.h"
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#define LED 2 //On board LED
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#define DHTTYPE DHT22 // DHT 11
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uint8_t DHTPin = 12;
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DHT dht(DHTPin, DHTTYPE);
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// define device I2C address: 0x76 or 0x77 (0x77 is library default address)
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#define BMP280_I2C_ADDRESS 0x76
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// initialize Adafruit BMP280 library
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Adafruit_BMP280 bmp280;
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float humidity, temperature, temperature_2, pressure;
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ESP8266WebServer server(80); //Server on port 80
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const char MAIN_page[] PROGMEM = R"=====(
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<!doctype html>
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<html>
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<head>
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<title>Weather</title>
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<h1 style="text-align:center; color:red;">Some Weather ....</h1>
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<h3 style="text-align:center;">NodeMCU Data Logger</h3>
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<style>
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canvas{
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-moz-user-select: none;
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-webkit-user-select: none;
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-ms-user-select: none;
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}
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/* Data Table Styling*/
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#dataTable {
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font-family: sans-serif;
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border-collapse: collapse;
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width: 100%;
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text-align: center;
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}
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#dataTable td, #dataTable th {
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border: 1px solid #ddd;
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padding: 8px;
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}
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#dataTable tr:nth-child(even){background-color: #f2f2f2;}
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#dataTable tr:hover {background-color: #ddd;}
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#dataTable th {
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padding-top: 12px;
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padding-bottom: 12px;
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text-align: center;
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background-color: #050505;
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color: white;
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}
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</style>
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</head>
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<body>
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<div>
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<table id="dataTable">
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<tr>
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<th>Time</th>
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<th>Temperature (°C)</th>
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<th>Temperature 2 (°C)</th>
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<th>Humidity (%)</th>
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<th>Pressure (hPa)</th>
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</tr>
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</table>
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</div>
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<br>
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<br>
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<script>
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var Tvalues = [];
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var Hvalues = [];
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var timeStamp = [];
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var T2value = [];
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var Pvalue = [];
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setInterval(function() {
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// Call a function repetatively with 5 Second interval
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getData();
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}, 5000); //5000mSeconds update rate
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function getData() {
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var xhttp = new XMLHttpRequest();
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xhttp.onreadystatechange = function() {
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if (this.readyState == 4 && this.status == 200) {
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//Push the data in array
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var time = new Date().toLocaleTimeString();
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var txt = this.responseText;
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var obj = JSON.parse(txt);
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Tvalues.push(obj.Temperature);
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Hvalues.push(obj.Humidity);
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T2value.push(obj.Temperature_2);
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Pvalue.push(obj.Pressure);
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timeStamp.push(time);
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if(Tvalues.length > 10){
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Tvalues.pop();
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Hvalues.pop();
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timeStamp.pop();
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T2value.pop();
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Pvalue.pop();
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document.getElementById("dataTable").deleteRow(10);
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}
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//Update Data Table
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var table = document.getElementById("dataTable");
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var row = table.insertRow(1); //Add after headings
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var cell1 = row.insertCell(0);
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var cell2 = row.insertCell(1);
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var cell3 = row.insertCell(2);
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var cell4 = row.insertCell(3);
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var cell5 = row.insertCell(4);
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cell1.innerHTML = time;
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cell2.innerHTML = obj.Temperature;
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cell3.innerHTML = obj.Temperature_2;
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cell4.innerHTML = obj.Humidity;
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cell5.innerHTML = obj.Pressure;
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}
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};
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xhttp.open("GET", "readData", true); //Handle readData server on ESP8266
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xhttp.send();
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}
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</script>
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</body>
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</html>
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)=====";
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void handleRoot() {
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String s = MAIN_page; //Read HTML contents
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server.send(200, "text/html", s); //Send web page
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}
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void readData() {
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String data = "{\"Temperature\":\"" + String(temperature) + "\", \"Humidity\":\"" + String(humidity) + "\", \"Temperature_2\":\"" + String(temperature_2) + "\", \"Pressure\":\"" + String(pressure) + "\" }";
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digitalWrite(LED,!digitalRead(LED)); //Toggle LED on data request ajax
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server.send(200, "text/plane", data); //Send ADC value, temperature and humidity JSON to client ajax request
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delay(2000);
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temperature = (dht.readTemperature());
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humidity = dht.readHumidity();
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// read temperature and pressure from BMP280 sensor
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temperature_2 = (bmp280.readTemperature()); // get temperature
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pressure = (bmp280.readPressure()/100); // get pressure
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Serial.println("T1: " + String(temperature) + " T2:" + String(temperature_2) + " H:" + String(humidity) + " P: " + String(pressure));
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}
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void setup ()
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{
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Serial.begin(115200);
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Serial.println();
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pinMode(DHTPin, INPUT);
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dht.begin();
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// initialize the BMP280 sensor
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//Wire.begin(D1, D2); // set I2C pins [SDA = D2, SCL = D1], default clock is 100kHz
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//Wire.begin(4, 0);
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Wire.begin();
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while(!bmp280.begin(BMP280_I2C_ADDRESS)){
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Serial.println("BPM280 put");
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delay(1000);
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}
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WiFi.begin(ssid, password); //Connect to your WiFi router
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Serial.println("");
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//Onboard LED port Direction output
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pinMode(LED,OUTPUT);
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// Wait for connection
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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//If connection successful show IP address in serial monitor
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Serial.println("");
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Serial.print("Connected to ");
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Serial.println(ssid);
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Serial.print("IP address: ");
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Serial.println(WiFi.localIP()); //IP address assigned to your ESP
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server.on("/", handleRoot); //Which routine to handle at root location. This is display page
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server.on("/readData", readData); //This page is called by java Script AJAX
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server.begin(); //Start server
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Serial.println("HTTP server started");
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}
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void loop(void){
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server.handleClient(); //Handle client requests
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}
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3
proj_password.h
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3
proj_password.h
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@ -0,0 +1,3 @@
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//SSID and Password of your WiFi router
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const char* ssid = "";
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const char* password = "";
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