Fix: Fixed database is locked error when enabling WAL in SQLite

agent/system_monitor.py

@@ -293,6 +293,8 @@ def on_connect(client, userdata, flags, reason_code, properties=None):
 
 def on_disconnect(client, userdata, disconnect_flags, reason_code, properties=None):
     logger.warning(f"⚠️ Disconnessione dal broker MQTT! Codice: {reason_code}")
+    logger.error("Forzo il riavvio del processo per ripristinare la rete in modo pulito...")
+    os._exit(1) # Uccide lo script immediatamente (Systemd lo farà risorgere)
 
 def on_message(client, userdata, msg):
     global boot_recovered, current_status, cfg

app.py

@@ -13,7 +13,7 @@ from logging.handlers import RotatingFileHandler
 # --- CONFIGURAZIONE LOGGING ---
 logging.basicConfig(
     handlers=[
-        RotatingFileHandler('/opt/web-control/fleet_console.log', maxBytes=2000000, backupCount=3),
+        RotatingFileHandler('/opt/web-control/fleet_console.log', maxBytes=10000000, backupCount=3),
         logging.StreamHandler()
     ],
     level=logging.INFO,
@@ -21,6 +21,8 @@ logging.basicConfig(
     datefmt='%Y-%m-%d %H:%M:%S'
 )
 logger = logging.getLogger("FleetHub")
+# Silenzia lo spam delle richieste HTTP (GET /api/states 200 OK)
+logging.getLogger('werkzeug').setLevel(logging.ERROR)
 
 # --- PERCORSI ---
 DB_PATH = '/opt/web-control/monitor.db'
@@ -33,6 +35,9 @@ CLIENTS_PATH = '/opt/web-control/clients.json'
 def init_db():
     conn = sqlite3.connect(DB_PATH)
     c = conn.cursor()
+
+    c.execute('PRAGMA journal_mode=WAL;') # <-- MAGIA: Abilita letture/scritture simultanee!
+
     c.execute('''CREATE TABLE IF NOT EXISTS radio_logs
                  (id INTEGER PRIMARY KEY AUTOINCREMENT, timestamp DATETIME, client_id TEXT, 
                   source_id TEXT, target TEXT, slot INTEGER, duration REAL, ber REAL, loss REAL)''')
@@ -158,7 +163,7 @@ def on_message(client, userdata, msg):
                 device_configs[cid_conf] = {}
             try:
                 device_configs[cid_conf][svc_name] = json.loads(payload)
-                logger.info(f"Configurazione salvata per {cid_conf} -> {svc_name}")
+                logger.debug(f"Configurazione salvata per {cid_conf} -> {svc_name}")
             except Exception as e:
                 logger.error(f"Errore parsing config JSON: {e}")
 
@@ -313,7 +318,7 @@ def get_clients():
 
 @app.route('/api/logs')
 def get_logs():
-    conn = sqlite3.connect(DB_PATH)
+    conn = sqlite3.connect(DB_PATH, timeout=10)
     c = conn.cursor()
     c.execute("SELECT timestamp, client_id, protocol, source_id, target, slot, duration, ber FROM radio_logs ORDER BY id DESC LIMIT 60")
     logs = c.fetchall()