diff --git a/Python/Xiao_BLE_tools/xiao_calibration_tool.py b/Python/Xiao_BLE_tools/xiao_calibration_tool.py
index 917017f..015a787 100644
--- a/Python/Xiao_BLE_tools/xiao_calibration_tool.py
+++ b/Python/Xiao_BLE_tools/xiao_calibration_tool.py
@@ -142,7 +142,18 @@ async def ble_loop():
                 await client.start_notify(DEBUG_CHAR_UUID, debug_callback)
                 await client.start_notify(SHOT_CHAR_UUID,  shot_callback)
                 ble_status = f"✅ {display_name}  ({addr})"
-                # À la connexion : envoyer config + activer debug FULL automatiquement
+                # À la connexion : lire la config sauvegardée dans le XIAO (flash)
+                try:
+                    raw = await client.read_gatt_char(CONFIG_CHAR_UUID)
+                    if len(raw) >= 22:
+                        vals = struct.unpack_from('<ffH', raw, 0)
+                        thresholds["accel"] = round(vals[0], 1)
+                        thresholds["gyro"]  = round(vals[1], 1)
+                        thresholds["audio"] = int(vals[2])
+                        print(f"📥 Config lue depuis XIAO → Accel:{thresholds['accel']:.1f}G  Gyro:{thresholds['gyro']:.0f}°/s  Audio:{thresholds['audio']}")
+                except Exception as ex:
+                    print(f"⚠️  Lecture config XIAO impossible: {ex}")
+                # Envoyer debug FULL (sans écraser les seuils du XIAO)
                 try:
                     payload = build_config_payload(include_debug=True)
                     await client.write_gatt_char(CONFIG_CHAR_UUID, payload, response=True)