From 852320b2903136c2b3c26eda6830e69786b902bc Mon Sep 17 00:00:00 2001
From: Roby <roberto@iv3jdv.net>
Date: Sun, 26 Apr 2026 13:37:17 +0200
Subject: [PATCH] Fix: make MQTT client ID configurable in config.json

---
 app.py              | 5 ++++-
 config.json.example | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/app.py b/app.py
index 1754dbd..2d0443e 100644
--- a/app.py
+++ b/app.py
@@ -373,7 +373,10 @@ def on_message(client, userdata, msg):
         logger.error(f"MQTT MSG ERROR: {e}")
 
 # --- MQTT CLIENT INITIALIZATION ---
-mqtt_backend = mqtt_client.Client(mqtt_client.CallbackAPIVersion.VERSION2, "flask_backend")
+# Recuperiamo l'ID dal config. Se per caso manca, usiamo un default di emergenza.
+mqtt_id = config['mqtt'].get('client_id', 'flask_backend_generic')
+
+mqtt_backend = mqtt_client.Client(mqtt_client.CallbackAPIVersion.VERSION2, mqtt_id)
 mqtt_backend.username_pw_set(config['mqtt']['user'], config['mqtt']['password'])
 mqtt_backend.on_connect = on_connect
 mqtt_backend.on_disconnect = on_disconnect
diff --git a/config.json.example b/config.json.example
index 510e0fd..fdf3ade 100644
--- a/config.json.example
+++ b/config.json.example
@@ -4,6 +4,7 @@
         "port": 1883,
         "user": "your_username",
         "password": "your_password"
+    "client_id": "fleet_backend_prod"
     },
     "web_admin": {
         "default_user": "admin",