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ESP32.ino
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ESP32.ino
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#include <WebServer.h>
#include <WiFi.h> //wifi library
#include <Adafruit_BMP280.h> //BMP280 library
#include <LiquidCrystal_I2C.h> //LCD library
#include <TinyGPS++.h> //GPS library
#include <SoftwareSerial.h> //Serial connection GPIO adjust
/****** HTTP CONNECTION SETUP ******/
const char* ssid = "YOUR_SSID";
const char* password = "YOUR_PASSWORD";
WiFiServer server(80); // Set web server port number to 80
String header; // Variable to store the HTTP request
unsigned long currentTime = millis();
unsigned long previousTime = 0;
const long timeoutTime = 2000; // Define timeout time in milliseconds
/****** BMP280_SENSOR ******/
Adafruit_BMP280 bmp; // I2C Interface
// for more accurate https://barometricpressure.app/cities
// insert your location sea level pressure (milibar)
float SEALEVELPRESSURE_HPA = 1013.25; //default value
/****** I2C_LCD ******/
LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 20, 4);
int lcdColumns = 20;
int lcdRows = 4;
/****** GLOBAL_STRING_DISPLAY ******/
String strLon = "not available";
String strLat = "not available";
String strAlt = "not available";
String strTemp, strPressure;
String numSats = "0";
String sym="/";
/****** NEO-6M_GPS_MODULE******/
static const int RXPin = 16, TXPin = 17; //UART2 pin configuration
static const uint32_t GPSBaud = 9600; //GPS baud rate
TinyGPSPlus gps; //create TinyGPSPlus object
SoftwareSerial ss(RXPin, TXPin); // The serial connection object to the GPS device
void setup() {
Serial.begin(9600); //start UART1 serial commnuication
lcd.init();// initialize LCD
lcd.backlight();
delay(1000);
lcd.clear();
//Connect to Wi-Fi network with given SSID and password
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
Serial.println("Connecting");
delay(500);
Serial.print(".");
}
// Print local IP address and start web server
Serial.println("");
Serial.print("Connected to WiFi network with IP Address: ");
Serial.println(WiFi.localIP());
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Connected:");
lcd.setCursor(0, 1);
lcd.print(WiFi.localIP());
server.begin();
delay(2000);
//BMP280 Initialization
if (!bmp.begin(0x76)) {
lcd.print("BMP280 not found.");
Serial.println(F("Could not find a valid BMP280 sensor, check wiring!"));
while (1);
}
/* Default settings from datasheet. */
bmp.setSampling(Adafruit_BMP280::MODE_NORMAL, /* Operating Mode. */
Adafruit_BMP280::SAMPLING_X2, /* Temp. oversampling */
Adafruit_BMP280::SAMPLING_X16, /* Pressure oversampling */
Adafruit_BMP280::FILTER_X16, /* Filtering. */
Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */
delay(3000);
lcd.clear();
lcd.print("BMP280 started.");
delay(2000);
lcd.clear();
// GPS Initialization
ss.begin(GPSBaud);
lcd.clear();
lcd.print("Booting GPS.");
delay(5000);
Serial.println(F("DeviceExample.ino"));
Serial.println(F("A simple demonstration of TinyGPS++ with an attached GPS module"));
Serial.print(F("Testing TinyGPS++ library v. "));
Serial.println(TinyGPSPlus::libraryVersion());
Serial.println(F("by Mikal Hart"));
Serial.println();
}
void loop() {
while (ss.available() > 0) {
if (gps.encode(ss.read())) { //funnel characters from GPS module using encode()
strLat = String(gps.location.lat(), 6);
strLon = String(gps.location.lng(), 6);
numSats = String(gps.satellites.value());
strTemp = bmp.readTemperature();
strPressure = bmp.readPressure() / 100.0F;
strAlt = bmp.readAltitude(SEALEVELPRESSURE_HPA);
displayUART(); //send data to serial monitor
displayLCD(); //display Temperature,Pressure and Altitude on LCD
webSever(); //create websever
delay(10000);
}
}
if (millis() > 5000 && gps.charsProcessed() < 10) {
Serial.println(F("No GPS detected: check wiring."));
while (true)
;
}
}
void webSever() {
WiFiClient client = server.available();
if (client) { // If a new client connects,
currentTime = millis();
previousTime = currentTime;
Serial.println("New Client."); // print a message out in the serial port
String currentLine = ""; // make a String to hold incoming data from the client
while (client.connected() && currentTime - previousTime <= timeoutTime) { // loop while the client's connected
currentTime = millis();
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
Serial.write(c); // print it out the serial monitor
header += c;
if (c == '\n') { // if the byte is a newline character
// if the current line is blank, you got two newline characters in a row.
// that's the end of the client HTTP request, so send a response:
if (currentLine.length() == 0) {
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println("Connection: close");
client.println();
// Display the HTML web page
client.println("<!DOCTYPE html><html>");
client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
client.println("<link rel=\"icon\" href=\"data:,\">");
// CSS to style the table
client.println("<style>body { text-align: center; font-family: \"Trebuchet MS\", Arial;}");
client.println("table { border-collapse: collapse; width:35%; margin-left:auto; margin-right:auto; }");
client.println("th { padding: 12px; background-color: #0043af; color: white; }");
client.println("tr { border: 1px solid #ddd; padding: 12px; }");
client.println("tr:hover { background-color: #bcbcbc; }");
client.println("td { border: none; padding: 12px; }");
client.println(".sensor { color:white; font-weight: bold; background-color: #bcbcbc; padding: 1px; }");
// Web Page Heading
client.println("</style></head><body><h1>ESP32 with BMP280 && NEO-6M GPS</h1>");
client.println("<table><tr><th>MEASUREMENT</th><th>VALUE</th></tr>");
client.println("<tr><td>Date</td><td><span class=\"sensor\">");
String date= gps.date.month() + sym + gps.date.day() + sym + gps.date.year();
client.println(date);
client.println("</span></td></tr>");
client.println("<tr><td>Temp. Celsius</td><td><span class=\"sensor\">");
client.println(strTemp);
client.println(" *C</span></td></tr>");
client.println("<tr><td>Temp. Fahrenheit</td><td><span class=\"sensor\">");
client.println(1.8 * bmp.readTemperature() + 32);
client.println(" *F</span></td></tr>");
client.println("<tr><td>Pressure</td><td><span class=\"sensor\">");
client.println(strPressure);
client.println(" hPa</span></td></tr>");
client.println("<tr><td>Approx. Altitude</td><td><span class=\"sensor\">");
client.println(strAlt);
client.println(" m</span></td></tr>");
client.println("<tr><td>Latitude</td><td><span class=\"sensor\">");
client.println(strLat);
client.println("</span></td></tr>");
client.println("<tr><td>Longitude</td><td><span class=\"sensor\">");
client.println(strLon);
client.println("</span></td></tr>");
client.println("<tr><td>Tracked Satellites </td><td><span class=\"sensor\">");
client.println(numSats);
client.println("</span></td></tr>");
client.println("</body></html>");
// The HTTP response ends with another blank line
client.println();
// Break out of the while loop
break;
} else { // if you got a newline, then clear currentLine
currentLine = "";
}
} else if (c != '\r') { // if you got anything else but a carriage return character,
currentLine += c; // add it to the end of the currentLine
}
}
}
// Clear the header variable
header = "";
// Close the connection
client.stop();
Serial.println("Client disconnected.");
Serial.println("");
}
}
void displayLCD() {
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Temperature ");
lcd.setCursor(12,0);
lcd.print(strTemp); lcd.print(" *C");
lcd.setCursor(0,1);
lcd.print("Pressure ");
lcd.setCursor(9,1);
lcd.print(strPressure); lcd.print(" hPa");
lcd.setCursor(0,2);
lcd.print("Altitude ");
lcd.setCursor(9,2);
lcd.print(strAlt); lcd.print(" m");
lcd.setCursor(0,3);
lcd.print("Sats ");
lcd.setCursor(5,3);
lcd.print(numSats);
delay(10);
}
void displayUART() {
Serial.println();
Serial.print(F("Temperature = "));
Serial.print(strTemp); //fetch and print Temperature
Serial.println(" *C");
Serial.print(F("Pressure = "));
Serial.print(strPressure); ////fetch and display Pressure in hPa
Serial.println(" hPa");
Serial.print(F("Approx altitude = "));
Serial.print(strAlt); //fetch and display Altitude in meters
Serial.println(" m");
Serial.println();
Serial.print(F("Location: "));
if (gps.location.isValid()) {
Serial.print(strLat);
Serial.print(F(","));
Serial.println(strLon);
} else {
Serial.println(F("INVALID"));
}
Serial.print(F(" Date/Time: "));
if (gps.date.isValid()) {
Serial.print(gps.date.month());
Serial.print(F("/"));
Serial.print(gps.date.day());
Serial.print(F("/"));
Serial.println(gps.date.year());
} else {
Serial.print(F("INVALID"));
}
Serial.print(F(" "));
if (gps.time.isValid()) {
if (gps.time.hour() < 10) Serial.print(F("0"));
Serial.print(gps.time.hour());
Serial.print(F(":"));
if (gps.time.minute() < 10) Serial.print(F("0"));
Serial.print(gps.time.minute());
Serial.print(F(":"));
if (gps.time.second() < 10) Serial.print(F("0"));
Serial.print(gps.time.second());
Serial.print(F("."));
if (gps.time.centisecond() < 10) Serial.print(F("0"));
Serial.print(gps.time.centisecond());
} else {
Serial.print(F("INVALID"));
}
}