From 1b11a5a8dde96fdec069aafa8ee9cf2774c0fab5 Mon Sep 17 00:00:00 2001
From: Alexandre <44178713+alexbelgium@users.noreply.github.com>
Date: Wed, 5 Nov 2025 22:25:17 +0100
Subject: [PATCH] Fix BirdNET-Pi MQTT callback for paho 2.x

---
 birdnet-pi/rootfs/helpers/birdnet_to_mqtt.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/birdnet-pi/rootfs/helpers/birdnet_to_mqtt.py b/birdnet-pi/rootfs/helpers/birdnet_to_mqtt.py
index af215a6b9..47a5e8283 100644
--- a/birdnet-pi/rootfs/helpers/birdnet_to_mqtt.py
+++ b/birdnet-pi/rootfs/helpers/birdnet_to_mqtt.py
@@ -113,7 +113,14 @@ def automatic_mqtt_publish(file, detection, path):
         log.info("Posted to MQTT: ok")
 
 
-mqttc = mqtt.Client("birdnet_mqtt", callback_api_version=4)
+# Create MQTT client using legacy callback API when available for
+# compatibility with paho-mqtt >= 2.0
+callback_api = getattr(mqtt, "CallbackAPIVersion", None)
+
+if callback_api is not None:
+    mqttc = mqtt.Client("birdnet_mqtt", callback_api_version=callback_api.VERSION1)
+else:
+    mqttc = mqtt.Client("birdnet_mqtt")
 mqttc.username_pw_set(mqtt_user, mqtt_pass)
 mqttc.on_connect = on_connect