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--- iothings:laboratoare:2025:lab9 [2025/11/23 12:46]
dan.tudose [3.3 Full main.cpp Example]
+++ iothings:laboratoare:2025:lab9 [2025/11/23 13:43] (current)
dan.tudose [3. ESP32-C6 Sparrow Firmware (HTTPS + BME680 + NeoPixel)]
@@ Line 174: / Line 174: @@
 ----
-===== 3. ESP32-C6 Firmware (HTTPS + BME680 + NeoPixel) =====
+===== 3. ESP32-C6 Sparrow Firmware (HTTPS + BME680 + NeoPixel) =====
-==== 3.1 Overview ====
 On boot, the firmware will:
@@ Line 191: / Line 189: @@
   * ''WiFiClientSecure'' for HTTPS.
-  * For simplicity we will call ''setInsecure()'' (it still uses TLS but skips certificate validation).
+  * We have embedded a proper CA certificate.
-    *For production, embed proper CA certificates.*
+  * The certificate is the full Google TLS root (GTS Root R1, cross-signed by GlobalSign) captured from a live identitytoolkit.googleapis.com chain and reverted to setCACert using that PEM
-==== 3.2 Configure Pins and Credentials ====
+Edit ''src/main.cpp'', get the code [[iothings:laboratoare:2025_code:lab9_1|here]].
 Fill in your credentials:
   * Wi-Fi SSID and password.
   * Firebase ''apiKey'' and ''databaseURL''.
@@ Line 203: / Line 200: @@
   * Device ID: ''sparrow-01''.
-==== 3.3 Full main.cpp Example ====
-Create or edit ''src/main.cpp'':
+. Build and upload the firmware.
+. In the serial monitor, verify:
-==== 3.4 Build, Upload, and Test ====
-. Connect the Sparrow using USB.
-. In pioarduino, build and upload the firmware.
-. Open the **Serial Monitor** at 115200 baud.
-. Verify:
      * Wi-Fi connects.
      * Firebase sign-in succeeds.
      * POST/GET requests show HTTP 200.
 . In Firebase console → Realtime Database, you should see data appearing under:
      * ''/devices/sparrow-01/telemetry''
 If you see sign-in or HTTPS errors, double-check:
   * ''FIREBASE_API_KEY''
   * ''FIREBASE_DB_URL''
@@ Line 226: / Line 215: @@
   * Wi-Fi credentials.
-----
 ===== 4. Web Dashboard (Password-Protected) =====
@@ Line 251: / Line 240: @@
     index.html
     app.js
+    chart.umd.min.js
 </code>
@@ Line 257: / Line 247: @@
 ==== 4.2 index.html ====
-Create ''dashboard/public/index.html'' with:
+Create ''dashboard/public/index.html'' with the code from [[iothings:laboratoare:2025_code:lab9_2|here]].
-<code html index.html>
-<!doctype html>
-<html lang="en">
-<head>
-  <meta charset="utf-8" />
-  <title>Sparrow Dashboard</title>
-  <meta name="viewport" content="width=device-width, initial-scale=1" />
-  <style>
-    body { font-family: system-ui, sans-serif; margin: 0; padding: 0; background: #111; color: #eee; }
-    .container { max-width: 900px; margin: 0 auto; padding: 1.5rem; }
-    h1, h2 { font-weight: 600; }
-    .card {
-      background: #1c1c1c;
-      border-radius: 1rem;
-      padding: 1rem 1.25rem;
-      margin-bottom: 1rem;
-      box-shadow: 0 10px 30px rgba(0,0,0,0.3);
-    }
-    input, button {
-      font-size: 1rem;
-      padding: 0.5rem 0.75rem;
-      border-radius: 0.5rem;
-      border: 1px solid #444;
-      background: #222;
-      color: #eee;
-      margin: 0.25rem 0;
-    }
-    button { cursor: pointer; }
-    button:hover { background: #333; }
-    table {
-      width: 100%;
-      border-collapse: collapse;
-      margin-top: 0.5rem;
-    }
-    th, td {
-      border-bottom: 1px solid #333;
-      text-align: left;
-      padding: 0.35rem 0.5rem;
-      font-size: 0.9rem;
-    }
-    .flex { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
-    .right { float: right; }
-    #dashboard { display: none; }
-    #led-color { padding: 0; border: none; width: 3rem; height: 2rem; }
-    .badge {
-      display: inline-block;
-      padding: 0.15rem 0.4rem;
-      border-radius: 999px;
-      font-size: 0.75rem;
-      background: #333;
-    }
-    .chart-stack { display: flex; flex-direction: column; gap: 1rem; }
-    .chart-card { background: #0d0d0d; border-radius: 0.75rem; padding: 0.75rem; }
-    canvas { width: 100%; height: 220px; }
-  </style>
-  <!-- Firebase compat CDN (v9.x) -->
-  <script defer src="https://www.gstatic.com/firebasejs/9.10.0/firebase-app-compat.js"></script>
-  <script defer src="https://www.gstatic.com/firebasejs/9.10.0/firebase-auth-compat.js"></script>
-  <script defer src="https://www.gstatic.com/firebasejs/9.10.0/firebase-database-compat.js"></script>
-  <!-- Chart.js self-hosted for realtime plots (avoid CDN/CSP issues) -->
-  <script defer src="chart.umd.min.js?v=1"></script>
-  <script defer src="app.js"></script>
-</head>
-<body>
-  <div class="container">
-    <!-- Login screen -->
-    <div id="login-screen" class="card">
-      <h1>🔐 Sparrow Login</h1>
-      <p>Enter your Firebase email & password.</p>
-      <input id="login-email" type="email" placeholder="Email" style="width:100%" />
-      <input id="login-password" type="password" placeholder="Password" style="width:100%" />
-      <button id="login-btn">Login</button>
-      <p id="login-error" style="color:#ff8080;"></p>
-    </div>
-    <!-- Dashboard -->
-    <div id="dashboard">
-      <div class="card">
-        <div class="flex">
-          <h1 style="margin:0;">🌡️ Sparrow Dashboard</h1>
-          <span class="badge" id="user-email"></span>
-          <button id="logout-btn" class="right">Logout</button>
-        </div>
-      </div>
-      <div class="card">
-        <h2>Latest reading</h2>
-        <div id="latest-reading">
-          <p>No data yet…</p>
-        </div>
-      </div>
-      <div class="card">
-        <h2>Realtime plots</h2>
-        <p id="chart-status" style="margin:0 0 0.5rem 0; color:#aaa; font-size:0.9rem;">Loading charts…</p>
-        <div class="chart-stack">
-          <div class="chart-card">
-            <div style="margin-bottom:0.25rem; color:#ccc; font-size:0.95rem;">Temperature (°C)</div>
-            <canvas id="chart-temp"></canvas>
-          </div>
-          <div class="chart-card">
-            <div style="margin-bottom:0.25rem; color:#ccc; font-size:0.95rem;">Humidity (%)</div>
-            <canvas id="chart-hum"></canvas>
-          </div>
-          <div class="chart-card">
-            <div style="margin-bottom:0.25rem; color:#ccc; font-size:0.95rem;">Pressure (hPa)</div>
-            <canvas id="chart-press"></canvas>
-          </div>
-        </div>
-      </div>
-      <div class="card">
-        <h2>History (last 20)</h2>
-        <table>
-          <thead>
-          <tr>
-            <th>Time</th>
-            <th>Temp (°C)</th>
-            <th>Hum (%)</th>
-            <th>Press (hPa)</th>
-          </tr>
-          </thead>
-          <tbody id="history-body">
-          </tbody>
-        </table>
-      </div>
-      <div class="card">
-        <h2>NeoPixel control</h2>
-        <div class="flex">
-          <label><input type="checkbox" id="led-on" /> LED On</label>
-          <label>Color <input type="color" id="led-color" value="#ffffff" /></label>
-          <button id="led-apply-btn">Apply</button>
-        </div>
-        <p id="led-status"></p>
-      </div>
-    </div>
-  </div>
-</body>
-</html>
-</code>
 ==== 4.3 app.js ====
-Create ''dashboard/public/app.js'' and paste this.
+Create ''dashboard/public/app.js'' and paste [[iothings:laboratoare:2025_code:lab9_3|this]].
-**Replace** the ''firebaseConfig'' values with those from your Firebase console:
-<code javascript>
+**Replace** the ''firebaseConfig'' values with those from your Firebase console.
-// ===== Firebase config (from Firebase console web app) =====
-const firebaseConfig = {
-  apiKey: "YOUR_API_KEY",
-  authDomain: "your-project-id.firebaseapp.com",
-  databaseURL: "https://your-project-id-default-rtdb.YOUR_REGION.firebasedatabase.app",
-  projectId: "your-project-id",
-};
-const DEVICE_ID = "sparrow-01";
-const MAX_CHART_POINTS = 50;
-const CHART_LOCAL_SRC = "chart.umd.min.js?v=1";
-const CHART_CDN_SRC   = "https://cdn.jsdelivr.net/npm/chart.js@4.4.3/dist/chart.umd.min.js";
-// Wait for Firebase scripts (loaded via defer)
-window.addEventListener("DOMContentLoaded", () => {
-  firebase.initializeApp(firebaseConfig);
-  const auth = firebase.auth();
-  const db = firebase.database();
-  const loginScreen = document.getElementById("login-screen");
-  const dashboard   = document.getElementById("dashboard");
-  const loginEmail    = document.getElementById("login-email");
-  const loginPassword = document.getElementById("login-password");
-  const loginBtn      = document.getElementById("login-btn");
-  const loginError    = document.getElementById("login-error");
-  const logoutBtn  = document.getElementById("logout-btn");
-  const userEmail  = document.getElementById("user-email");
-  const latestDiv  = document.getElementById("latest-reading");
-  const historyBody = document.getElementById("history-body");
-  const chartTempEl = document.getElementById("chart-temp");
-  const chartHumEl  = document.getElementById("chart-hum");
-  const chartPressEl= document.getElementById("chart-press");
-  const chartStatus = document.getElementById("chart-status");
-  const ledOnCheckbox = document.getElementById("led-on");
-  const ledColorInput = document.getElementById("led-color");
-  const ledApplyBtn   = document.getElementById("led-apply-btn");
-  const ledStatus     = document.getElementById("led-status");
-  let charts = null;
-  const chartState = {
-    labels: [],
-    temp: [],
-    hum: [],
-    press: [],
-  };
-  function loadScript(src) {
-    return new Promise((resolve, reject) => {
-      const s = document.createElement("script");
-      s.src = src;
-      s.onload = resolve;
-      s.onerror = reject;
-      document.head.appendChild(s);
-    });
-  }
-  async function ensureChartReady() {
-    if (window.Chart) {
-      if (chartStatus) chartStatus.textContent = `Charts ready (Chart.js ${window.Chart.version || ""})`;
-      return true;
-    }
-    if (chartStatus) chartStatus.textContent = "Loading charts…";
-    try {
-      await loadScript(CHART_LOCAL_SRC);
-    } catch (e) {
-      console.warn("Local Chart.js failed, trying CDN", e);
-      try {
-        await loadScript(CHART_CDN_SRC);
-      } catch (e2) {
-        console.error("Chart.js failed to load from all sources", e2);
-        return false;
-      }
-    }
-    const ok = !!window.Chart;
-    if (chartStatus) chartStatus.textContent = ok ? `Charts ready (Chart.js ${window.Chart.version || ""})` : "Charts unavailable";
-    return ok;
-  }
-  function resetCharts() {
-    chartState.labels = [];
-    chartState.temp = [];
-    chartState.hum = [];
-    chartState.press = [];
-    if (charts) {
-      charts.temp.data.labels = [];
-      charts.temp.data.datasets[0].data = [];
-      charts.hum.data.labels = [];
-      charts.hum.data.datasets[0].data = [];
-      charts.press.data.labels = [];
-      charts.press.data.datasets[0].data = [];
-      charts.temp.update("none");
-      charts.hum.update("none");
-      charts.press.update("none");
-    }
-  }
-  function initCharts() {
-    if (!window.Chart) {
-      console.warn("Chart.js not available");
-      return;
-    }
-    const baseOptions = {
-      responsive: true,
-      animation: false,
-      plugins: { legend: { display: false } },
-      scales: {
-        x: { ticks: { color: "#aaa" }, grid: { color: "rgba(255,255,255,0.05)" } },
-        y: { ticks: { color: "#aaa" }, grid: { color: "rgba(255,255,255,0.05)" } },
-      },
-    };
-    charts = {
-      temp: new Chart(chartTempEl.getContext("2d"), {
-        type: "line",
-        data: { labels: [], datasets: [{ label: "Temp (°C)", data: [], borderColor: "#ff6b6b", backgroundColor: "rgba(255,107,107,0.15)", tension: 0.2, fill: true, pointRadius: 0 }] },
-        options: baseOptions,
-      }),
-      hum: new Chart(chartHumEl.getContext("2d"), {
-        type: "line",
-        data: { labels: [], datasets: [{ label: "Hum (%)", data: [], borderColor: "#4fd1c5", backgroundColor: "rgba(79,209,197,0.15)", tension: 0.2, fill: true, pointRadius: 0 }] },
-        options: baseOptions,
-      }),
-      press: new Chart(chartPressEl.getContext("2d"), {
-        type: "line",
-        data: { labels: [], datasets: [{ label: "Press (hPa)", data: [], borderColor: "#9f7aea", backgroundColor: "rgba(159,122,234,0.15)", tension: 0.2, fill: true, pointRadius: 0 }] },
-        options: baseOptions,
-      }),
-    };
-  }
-  function updateCharts(ts, t, h, p) {
-    if (!charts) return;
-    const label = new Date(ts).toLocaleTimeString([], { hour: "2-digit", minute: "2-digit", second: "2-digit" });
-    chartState.labels.push(label);
-    chartState.temp.push(t);
-    chartState.hum.push(h);
-    chartState.press.push(p);
-    if (chartState.labels.length > MAX_CHART_POINTS) {
-      chartState.labels.shift();
-      chartState.temp.shift();
-      chartState.hum.shift();
-      chartState.press.shift();
-    }
-    charts.temp.data.labels = chartState.labels.slice();
-    charts.hum.data.labels = chartState.labels.slice();
-    charts.press.data.labels = chartState.labels.slice();
-    charts.temp.data.datasets[0].data = chartState.temp.slice();
-    charts.hum.data.datasets[0].data  = chartState.hum.slice();
-    charts.press.data.datasets[0].data= chartState.press.slice();
-    charts.temp.update("none");
-    charts.hum.update("none");
-    charts.press.update("none");
-    if (chartStatus) chartStatus.textContent = `Charts live — last update ${label}`;
-  }
-  // ===== Auth UI handling =====
-  auth.onAuthStateChanged((user) => {
-    if (user) {
-      loginScreen.style.display = "none";
-      dashboard.style.display = "block";
-      userEmail.textContent = user.email || "(no email)";
-      resetCharts();
-      ensureChartReady().then((ok) => {
-        if (ok) {
-          initCharts();
-        } else {
-          console.warn("Charts disabled: Chart.js not available");
-          if (chartStatus) chartStatus.textContent = "Charts disabled: Chart.js not available (check console / cache)";
-        }
-        startDataListeners();
-      });
-    } else {
-      dashboard.style.display = "none";
-      loginScreen.style.display = "block";
-      userEmail.textContent = "";
-      historyBody.innerHTML = "";
-      latestDiv.innerHTML = "<p>No data yet…</p>";
-      resetCharts();
-      if (chartStatus) chartStatus.textContent = "Charts require login to load.";
-    }
-  });
-  loginBtn.addEventListener("click", () => {
-    loginError.textContent = "";
-    const email = loginEmail.value.trim();
-    const pass  = loginPassword.value.trim();
-    auth.signInWithEmailAndPassword(email, pass)
-      .catch(err => {
-        console.error(err);
-        loginError.textContent = err.message;
-      });
-  });
-  logoutBtn.addEventListener("click", () => {
-    auth.signOut();
-  });
-  // ===== Telemetry listeners =====
-  function addHistoryRow(ts, t, h, p) {
-    const tr = document.createElement("tr");
-    const date = new Date(ts);
-    tr.innerHTML = `
-      <td>${date.toLocaleString()}</td>
-      <td>${t.toFixed(1)}</td>
-      <td>${h.toFixed(1)}</td>
-      <td>${p.toFixed(1)}</td>
-    `;
-    historyBody.prepend(tr); // newest on top
-    // Keep at most 20 rows
-    while (historyBody.rows.length > 20) {
-      historyBody.deleteRow(historyBody.rows.length - 1);
-    }
-  }
-  function updateLatest(ts, t, h, p) {
-    const date = new Date(ts);
-    latestDiv.innerHTML = `
-      <p><strong>${date.toLocaleString()}</strong></p>
-      <p>Temperature: <strong>${t.toFixed(1)} °C</strong></p>
-      <p>Humidity: <strong>${h.toFixed(1)} %</strong></p>
-      <p>Pressure: <strong>${p.toFixed(1)} hPa</strong></p>
-    `;
-  }
-  function startDataListeners() {
-    // Listen for last 20 telemetry entries
-    const telemRef = db.ref(`devices/${DEVICE_ID}/telemetry`).limitToLast(20);
-    telemRef.off(); // avoid duplicates on re-login
-    telemRef.on("child_added", (snap) => {
-      const val = snap.val();
-      if (!val) return;
-      const ts = val.timestamp || Date.now();
-      const t  = val.temperature || 0;
-      const h  = val.humidity || 0;
-      const p  = val.pressure || 0;
-      updateLatest(ts, t, h, p);
-      addHistoryRow(ts, t, h, p);
-      updateCharts(ts, t, h, p);
-    });
-    // Keep dashboard LED controls in sync with DB
-    const ledRef = db.ref(`devices/${DEVICE_ID}/led`);
-    ledRef.off();
-    ledRef.on("value", (snap) => {
-      const val = snap.val();
-      if (!val) return;
-      const state = val.state || "off";
-      const color = val.color || "#ffffff";
-      ledOnCheckbox.checked = state === "on";
-      ledColorInput.value   = color;
-      ledStatus.textContent = `Current: ${state.toUpperCase()} ${color}`;
-    });
-  }
-  // ===== LED control write =====
-  ledApplyBtn.addEventListener("click", () => {
-    const state = ledOnCheckbox.checked ? "on" : "off";
-    const color = ledColorInput.value || "#ffffff";
-    const ledRef = db.ref(`devices/${DEVICE_ID}/led`);
-    ledRef.set({ state, color })
-      .then(() => {
-        ledStatus.textContent = `Set: ${state.toUpperCase()} ${color}`;
-      })
-      .catch(err => {
-        console.error(err);
-        ledStatus.textContent = `Error: ${err.message}`;
-      });
-  });
-});
-</code>
+==== 4.4 chart.umd.min.js ====
+Create ''dashboard/public/chart.umd.min.js''. You need this for rendering the charts locally.
+The code is [[iothings:laboratoare:2025_code:lab9_4|here]].
 ===== 5. Deploy Dashboard with Firebase Hosting =====