first commit

app.py

@@ -0,0 +1,73 @@
+#!/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)