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VolosR
221
5exampleAddingTemperature/5exampleAddingTemperature.ino
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221
5exampleAddingTemperature/5exampleAddingTemperature.ino
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#include <WiFi.h>
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#include <WebServer.h>
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#include <ESPmDNS.h>
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#include <time.h>
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#include <Wire.h>
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#include <Adafruit_BMP085.h> // Works for BMP180 too
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// ================== CHANGE THESE ==================
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const char* ssid = "Bertovic";
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const char* password = "18072019";
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// mDNS name => http://myhome.local/
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const char* mdnsName = "myhome";
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// NTP
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const char* ntpServer = "pool.ntp.org";
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// Timezone example: Europe/Zagreb (CET = UTC+1). This offset version does NOT auto-handle DST.
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const long gmtOffset_sec = 3600; // UTC+1
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const int daylightOffset_sec = 0;
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// BMP180 I2C pins (your values)
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// NOTE: On many ESP32 boards, GPIO 6/7 are not usable (often connected to flash).
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// If it doesn't work, use e.g. SDA=21, SCL=22 (common defaults).
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#define SDA_PIN 7
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#define SCL_PIN 6
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// ==================================================
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WebServer server(80);
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Adafruit_BMP085 bmp;
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bool bmpOk = false;
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float lastTempC = NAN;
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unsigned long lastTempReadMs = 0;
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String getTimeString() {
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struct tm timeinfo;
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if (!getLocalTime(&timeinfo)) return "Time not ready";
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char buf[32];
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strftime(buf, sizeof(buf), "%H:%M:%S", &timeinfo);
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return String(buf);
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}
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String getDateString() {
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struct tm timeinfo;
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if (!getLocalTime(&timeinfo)) return "";
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char buf[64];
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strftime(buf, sizeof(buf), "%A, %d %B %Y", &timeinfo);
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return String(buf);
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}
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void updateTemperatureIfNeeded() {
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// Read BMP180 at most once per second
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if (!bmpOk) return;
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unsigned long now = millis();
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if (now - lastTempReadMs < 1000) return;
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lastTempReadMs = now;
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float t = bmp.readTemperature();
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lastTempC = t;
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// Optional Serial output (like your original code)
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Serial.print("Temperature: ");
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Serial.print(lastTempC);
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Serial.println(" °C");
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}
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String getTempString() {
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updateTemperatureIfNeeded();
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if (!bmpOk) return "Sensor not detected";
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if (isnan(lastTempC)) return "Reading...";
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char buf[16];
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// 1 decimal place, e.g. 23.4 °C
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snprintf(buf, sizeof(buf), "%.1f °C", lastTempC);
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return String(buf);
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}
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void handleRoot() {
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String page = R"rawliteral(
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>ESP32 Temperature</title>
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<link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;600;900&display=swap" rel="stylesheet">
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<style>
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html, body {
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height: 100%;
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margin: 0;
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font-family: 'Inter', sans-serif;
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background: linear-gradient(135deg, #0b132b, #1c2541, #3a506b);
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color: white;
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}
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.container {
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height: 100%;
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display: flex;
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flex-direction: column;
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align-items: center;
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justify-content: center;
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text-align: center;
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padding: 24px;
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box-sizing: border-box;
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}
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.temp {
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font-size: clamp(4.5rem, 14vw, 8rem);
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font-weight: 900;
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letter-spacing: 1px;
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line-height: 1;
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}
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.time {
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margin-top: 12px;
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font-size: clamp(2.2rem, 6vw, 3.6rem);
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font-weight: 600;
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opacity: 0.9;
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}
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.date {
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margin-top: 10px;
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font-size: 1.1rem;
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opacity: 0.8;
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}
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.small {
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margin-top: 18px;
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font-size: 0.9rem;
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opacity: 0.6;
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}
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</style>
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</head>
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<body>
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<div class="container">
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<div class="temp" id="temp">--.- °C</div>
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<div class="time" id="time">--:--:--</div>
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<div class="date" id="date"></div>
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<div class="small">myhome.local • ESP32</div>
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</div>
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<script>
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async function update(){
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try {
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document.getElementById('temp').textContent =
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await (await fetch('/temp', { cache: 'no-store' })).text();
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document.getElementById('time').textContent =
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await (await fetch('/time', { cache: 'no-store' })).text();
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document.getElementById('date').textContent =
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await (await fetch('/date', { cache: 'no-store' })).text();
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} catch (e) {}
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}
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update();
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setInterval(update, 1000);
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</script>
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</body>
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</html>
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)rawliteral";
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server.send(200, "text/html", page);
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}
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void handleTime() { server.send(200, "text/plain", getTimeString()); }
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void handleDate() { server.send(200, "text/plain", getDateString()); }
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void handleTemp() { server.send(200, "text/plain", getTempString()); }
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void setup() {
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Serial.begin(115200);
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delay(1000);
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// I2C init with your custom pins
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Wire.begin(SDA_PIN, SCL_PIN);
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Serial.println("Initializing BMP180...");
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bmpOk = bmp.begin();
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if (!bmpOk) {
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Serial.println("Could not find BMP180 sensor!");
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} else {
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Serial.println("BMP180 detected!");
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}
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// Wi-Fi
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WiFi.begin(ssid, password);
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Serial.print("Connecting to WiFi");
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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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Serial.println("\nWiFi connected!");
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Serial.print("ESP32 IP: ");
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Serial.println(WiFi.localIP());
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// mDNS
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if (!MDNS.begin(mdnsName)) {
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Serial.println("mDNS start FAILED");
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} else {
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Serial.print("mDNS started: http://");
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Serial.print(mdnsName);
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Serial.println(".local/");
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}
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// Time sync
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configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
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// Web routes
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server.on("/", handleRoot);
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server.on("/time", handleTime);
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server.on("/date", handleDate);
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server.on("/temp", handleTemp);
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server.begin();
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Serial.println("HTTP server started");
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}
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void loop() {
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server.handleClient();
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updateTemperatureIfNeeded(); // keep temp fresh even if nobody is polling
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}
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