Halo balik lagi sama saya SUlis, pada kesempatan kali ini saya akan membagikan sebuah pengalaman mengguanakan ESP32 dengan BME280 untuk menampilkan data visualisasi pada Web Server. Mungkin dari temen-temen bisa memberikan saran dan masukkannya:)
Yang Dibutuhkan:
- ESP32 Development Board
- BME280
- Jumper
- Breadboard
- Arduino IDE
Nah, langkah yang dilakukan setelah kelima bahan di atas sudah tersedia yaitu
Installing the ESP32 Filesystem Uploader pada Arduino IDE
Untuk penginstallan ESP32 Filesystem Uploader ini dapat dilakukan seperti pada link https://randomnerdtutorials.com/install-esp32-filesystem-uploader-arduino-ide/
Installing libraries: Async Web Server for ESP8266 and ESP32
File ini dapat diunduh pada link https://github.com/me-no-dev/ESPAsyncWebServer
Installing libraries: Async TCP Library for ESP32
File ini dapat diunduh di https://github.com/me-no-dev/AsyncTCP
Berikut rangkaian ESP32 dengan BME280
Sumber gambar: randomnerdtutorials.com
Kemudian, saya membuat file bernama index.html pada folder seperti berikut ini
Sumber gambar: randomnerdtutorials.com
File index.html
<!DOCTYPE HTML><html>
<!-- Rui Santos - Complete project details at https://RandomNerdTutorials.com
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files.
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software. -->
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="https://code.highcharts.com/highcharts.js"></script>
<style>
body {
min-width: 310px;
max-width: 800px;
height: 400px;
margin: 0 auto;
}
h2 {
font-family: Arial;
font-size: 2.5rem;
text-align: center;
}
</style>
</head>
<body>
<h2>ESP Weather Station</h2>
<div id="chart-temperature" class="container"></div>
<div id="chart-humidity" class="container"></div>
<div id="chart-pressure" class="container"></div>
</body>
<script>
var chartT = new Highcharts.Chart({
chart:{ renderTo : 'chart-temperature' },
title: { text: 'BME280 Temperature' },
series: [{
showInLegend: false,
data: []
}],
plotOptions: {
line: { animation: false,
dataLabels: { enabled: true }
},
series: { color: '#059e8a' }
},
xAxis: { type: 'datetime',
dateTimeLabelFormats: { second: '%H:%M:%S' }
},
yAxis: {
title: { text: 'Temperature (Celsius)' }
//title: { text: 'Temperature (Fahrenheit)' }
},
credits: { enabled: false }
});
setInterval(function ( ) {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
var x = (new Date()).getTime(),
y = parseFloat(this.responseText);
//console.log(this.responseText);
if(chartT.series[0].data.length > 40) {
chartT.series[0].addPoint([x, y], true, true, true);
} else {
chartT.series[0].addPoint([x, y], true, false, true);
}
}
};
xhttp.open("GET", "/temperature", true);
xhttp.send();
}, 30000 ) ;
var chartH = new Highcharts.Chart({
chart:{ renderTo:'chart-humidity' },
title: { text: 'BME280 Humidity' },
series: [{
showInLegend: false,
data: []
}],
plotOptions: {
line: { animation: false,
dataLabels: { enabled: true }
}
},
xAxis: {
type: 'datetime',
dateTimeLabelFormats: { second: '%H:%M:%S' }
},
yAxis: {
title: { text: 'Humidity (%)' }
},
credits: { enabled: false }
});
setInterval(function ( ) {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
var x = (new Date()).getTime(),
y = parseFloat(this.responseText);
//console.log(this.responseText);
if(chartH.series[0].data.length > 40) {
chartH.series[0].addPoint([x, y], true, true, true);
} else {
chartH.series[0].addPoint([x, y], true, false, true);
}
}
};
xhttp.open("GET", "/humidity", true);
xhttp.send();
}, 30000 ) ;
var chartP = new Highcharts.Chart({
chart:{ renderTo:'chart-pressure' },
title: { text: 'BME280 Pressure' },
series: [{
showInLegend: false,
data: []
}],
plotOptions: {
line: { animation: false,
dataLabels: { enabled: true }
},
series: { color: '#18009c' }
},
xAxis: {
type: 'datetime',
dateTimeLabelFormats: { second: '%H:%M:%S' }
},
yAxis: {
title: { text: 'Pressure (hPa)' }
},
credits: { enabled: false }
});
setInterval(function ( ) {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
var x = (new Date()).getTime(),
y = parseFloat(this.responseText);
//console.log(this.responseText);
if(chartP.series[0].data.length > 40) {
chartP.series[0].addPoint([x, y], true, true, true);
} else {
chartP.series[0].addPoint([x, y], true, false, true);
}
}
};
xhttp.open("GET", "/pressure", true);
xhttp.send();
}, 30000 ) ;
</script>
</html>
Arduino Sketch
/*********
Rui Santos
Complete project details at https://RandomNerdTutorials.com
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files.
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
*********/
// Import required libraries
#ifdef ESP32
#include <WiFi.h>
#include <ESPAsyncWebServer.h>
#include <SPIFFS.h>
#else
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <Hash.h>
#include <ESPAsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include <FS.h>
#endif
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
/*#include <SPI.h>
#define BME_SCK 18
#define BME_MISO 19
#define BME_MOSI 23
#define BME_CS 5*/
Adafruit_BME280 bme; // I2C
//Adafruit_BME280 bme(BME_CS); // hardware SPI
//Adafruit_BME280 bme(BME_CS, BME_MOSI, BME_MISO, BME_SCK); // software SPI
// Replace with your network credentials
const char* ssid = "REPLACE_WITH_YOUR_SSID";
const char* password = "REPLACE_WITH_YOUR_PASSWORD";
// Create AsyncWebServer object on port 80
AsyncWebServer server(80);
String readBME280Temperature() {
// Read temperature as Celsius (the default)
float t = bme.readTemperature();
// Convert temperature to Fahrenheit
//t = 1.8 * t + 32;
if (isnan(t)) {
Serial.println("Failed to read from BME280 sensor!");
return "";
}
else {
Serial.println(t);
return String(t);
}
}
String readBME280Humidity() {
float h = bme.readHumidity();
if (isnan(h)) {
Serial.println("Failed to read from BME280 sensor!");
return "";
}
else {
Serial.println(h);
return String(h);
}
}
String readBME280Pressure() {
float p = bme.readPressure() / 100.0F;
if (isnan(p)) {
Serial.println("Failed to read from BME280 sensor!");
return "";
}
else {
Serial.println(p);
return String(p);
}
}
void setup(){
// Serial port for debugging purposes
Serial.begin(115200);
bool status;
// default settings
// (you can also pass in a Wire library object like &Wire2)
status = bme.begin(0x76);
if (!status) {
Serial.println("Could not find a valid BME280 sensor, check wiring!");
while (1);
}
// Initialize SPIFFS
if(!SPIFFS.begin()){
Serial.println("An Error has occurred while mounting SPIFFS");
return;
}
// Connect to Wi-Fi
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi..");
}
// Print ESP32 Local IP Address
Serial.println(WiFi.localIP());
// Route for root / web page
server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
request->send(SPIFFS, "/index.html");
});
server.on("/temperature", HTTP_GET, [](AsyncWebServerRequest *request){
request->send_P(200, "text/plain", readBME280Temperature().c_str());
});
server.on("/humidity", HTTP_GET, [](AsyncWebServerRequest *request){
request->send_P(200, "text/plain", readBME280Humidity().c_str());
});
server.on("/pressure", HTTP_GET, [](AsyncWebServerRequest *request){
request->send_P(200, "text/plain", readBME280Pressure().c_str());
});
// Start server
server.begin();
}
void loop(){
}
Kemudian di menu tools>ESP32 Sketch Data Upload.
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