commit d9fc362e34fd9c5ee1028b109704de16b5913866
Author: Lucca Pirovano <luccapirovano@gmx.com>
Date:   Sat Nov 15 18:01:18 2025 -0500

    first commit

diff --git a/README.md b/README.md
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+++ b/README.md
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+# arduino-fan-vehicle
diff --git a/app.py b/app.py
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+++ b/app.py
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+#!/usr/bin/env python3
+from flask import Flask, render_template, jsonify
+import serial
+import serial.tools.list_ports
+import threading
+import time
+
+app = Flask(__name__)
+
+# --- Auto-find Arduino ---
+def find_arduino():
+    for p in serial.tools.list_ports.comports():
+        if 'Arduino' in p.description or 'ACM' in p.device or 'USB' in p.device:
+            return p.device
+    return '/dev/ttyACM0'
+
+PORT = find_arduino()
+BAUD = 115200
+
+# Global serial object
+ser = None
+serial_lock = threading.Lock()
+
+def init_serial():
+    global ser
+    try:
+        ser = serial.Serial(PORT, BAUD, timeout=0)
+        time.sleep(2)  # wait for Arduino reset
+        print(f"Connected to {PORT}")
+    except Exception as e:
+        print(f"Serial error: {e}")
+        ser = None
+
+init_serial()
+
+# --- Send command safely ---
+def send_command(cmd):
+    with serial_lock:
+        if ser and ser.is_open:
+            try:
+                ser.write(cmd.encode())
+                ser.flush()
+            except:
+                print("Serial write failed")
+        else:
+            print("Serial not open")
+
+# --- Background reader (optional: show live feedback) ---
+def serial_reader():
+    while True:
+        if ser and ser.in_waiting:
+            line = ser.readline().decode(errors='ignore').strip()
+            if line:
+                print(f"Arduino: {line}")
+        time.sleep(0.01)
+
+threading.Thread(target=serial_reader, daemon=True).start()
+
+# --- Routes ---
+@app.route('/')
+def index():
+    return render_template('index.html')
+
+@app.route('/cmd/<key>')
+def command(key):
+    if len(key) == 1 and key in '0123456789fFsS':
+        send_command(key)
+        return jsonify(status="ok", key=key)
+    return jsonify(status="invalid"), 400
+
+if __name__ == '__main__':
+    # Allow access from your phone/tablet on same WiFi
+    app.run(host='0.0.0.0', port=5000, debug=False)
diff --git a/fan_control.py b/fan_control.py
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+++ b/fan_control.py
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+#!/usr/bin/env python3
+"""
+Ultra-responsive fan control – every key press is sent instantly.
+Uses raw stdin + select() with zero timeout.
+"""
+import serial
+import sys
+import select
+import termios
+import tty
+import serial.tools.list_ports
+
+# -------------------------------------------------
+# Auto-detect Arduino port
+# -------------------------------------------------
+def find_arduino():
+    for p in serial.tools.list_ports.comports():
+        if 'Arduino' in p.description or 'ACM' in p.device or 'USB' in p.device:
+            return p.device
+    return None
+
+PORT = find_arduino() or '/dev/ttyACM0'
+BAUD = 115200
+
+# -------------------------------------------------
+def raw_stdin():
+    """Put stdin into raw mode and return old settings."""
+    fd = sys.stdin.fileno()
+    old = termios.tcgetattr(fd)
+    tty.setraw(fd)
+    return old
+
+# -------------------------------------------------
+def main():
+    # --- open serial -------------------------------------------------
+    try:
+        ser = serial.Serial(PORT, BAUD, timeout=0)   # non-blocking
+    except Exception as e:
+        sys.exit(f"Cannot open {PORT}: {e}")
+
+    print(f"Connected to {PORT}")
+    print("Keys: 0-9, f=full, s=stop, q=quit   (every press is sent immediately)")
+
+    old_term = raw_stdin()
+    try:
+        while True:
+            # ---- non-blocking read from keyboard (0-second timeout) ----
+            rlist, _, _ = select.select([sys.stdin], [], [], 0)
+            if rlist:
+                key = sys.stdin.read(1)          # exactly one char
+                if key.lower() == 'q':
+                    print("\nBye!")
+                    break
+                ser.write(key.encode())          # send raw byte
+                print(f" → {key}", end='', flush=True)
+
+            # ---- echo any reply from Arduino (non-blocking) ----
+            if ser.in_waiting:
+                reply = ser.read(ser.in_waiting).decode(errors='ignore')
+                print(reply, end='', flush=True)
+
+    finally:
+        termios.tcsetattr(sys.stdin.fileno(), termios.TCSADRAIN, old_term)
+        ser.close()
+
+if __name__ == '__main__':
+    main()
diff --git a/sketch_oct23a/sketch_oct23a.ino b/sketch_oct23a/sketch_oct23a.ino
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+++ b/sketch_oct23a/sketch_oct23a.ino
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+const int FAN_PIN = 9; // Pin connected to the FAN
+
+void setup() {
+  pinMode(FAN_PIN, OUTPUT); // Set the FAN pin as an output
+}
+
+void loop() {
+  digitalWrite(FAN_PIN, HIGH); // Turn the FAN on
+  Serial.print("Fan-High");
+  delay(2000);                 // Wait for 1 second
+  digitalWrite(FAN_PIN, LOW);  // Turn the FAN off
+  Serial.print("Fan-Low");
+  delay(2000);                 // Wait for 1 second
+}
\ No newline at end of file
diff --git a/templates/index.html b/templates/index.html
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+++ b/templates/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
+  <title>Fan Speed Control</title>
+  <style>
+    body { font-family: Arial; text-align: center; padding: 2rem; background: #f4f4f4; }
+    .btn { 
+      font-size: 1.5rem; padding: 1rem 1.5rem; margin: 0.5rem;
+      background: #007bff; color: white; border: none; border-radius: 8px;
+      cursor: pointer; width: 80px;
+    }
+    .btn:hover { background: #0056b3; }
+    .btn.stop { background: #dc3545; }
+    .btn.stop:hover { background: #b02a37; }
+    .btn.full { background: #28a745; }
+    .btn.full:hover { background: #218838; }
+    #status { margin-top: 1rem; font-size: 1.2rem; color: #333; }
+    .keys { margin-top: 2rem; font-size: 1rem; color: #666; }
+  </style>
+</head>
+<body>
+  <h1>Fan Speed Control</h1>
+  <p>Click buttons or press keys: <strong>0–9, f, s</strong></p>
+
+  <div>
+    <button class="btn stop"   onclick="send('s')">S<br>Stop</button>
+    <button class="btn"        onclick="send('1')">1<br>~11%</button>
+    <button class="btn"        onclick="send('2')">2<br>~20%</button>
+    <button class="btn"        onclick="send('3')">3<br>~30%</button>
+    <button class="btn"        onclick="send('4')">4<br>~40%</button>
+    <button class="btn"        onclick="send('5')">5<br>50%</button>
+    <button class="btn"        onclick="send('6')">6<br>~60%</button>
+    <button class="btn"        onclick="send('7')">7<br>~70%</button>
+    <button class="btn"        onclick="send('8')">8<br>~80%</button>
+    <button class="btn"        onclick="send('9')">9<br>~90%</button>
+    <button class="btn full"   onclick="send('f')">F<br>Full</button>
+  </div>
+
+  <div id="status">Ready. Press keys or click buttons.</div>
+  <div class="keys">Keyboard: 0–9, f = full, s = stop</div>
+
+  <script>
+    function send(key) {
+      fetch(`/cmd/${key}`)
+        .then(r => r.json())
+        .then(data => {
+          if (data.status === 'ok') {
+            document.getElementById('status').textContent = `Sent: ${key.toUpperCase()} → Fan updated`;
+          }
+        })
+        .catch(() => {
+          document.getElementById('status').textContent = 'Error: Is Arduino connected?';
+        });
+    }
+
+    // Keyboard control
+    document.addEventListener('keydown', (e) => {
+      const k = e.key.toLowerCase();
+      if ('0123456789fs'.includes(k)) {
+        e.preventDefault();
+        send(k);
+      }
+    });
+  </script>
+</body>
+</html>