diff --git a/operator_setup.sh b/operator_setup.sh
old mode 100755
new mode 100644
index 4500791..b10ef83
--- a/operator_setup.sh
+++ b/operator_setup.sh
@@ -405,6 +405,44 @@ if [[ "$enable_alerter" =~ ^[yY]$ ]]; then
     fi
 fi
 
+# BLE Presence Detection
+step "BLE Presence Detection"
+prompt_default enable_ble "Enable BLE presence alerter? (y/n)" "n"
+BB_BLE_MODE="open"
+BB_BLE_DEVICES=""
+BB_BLE_TIMEOUT="60"
+BB_BLE_MATRIX_HS=""
+BB_BLE_MATRIX_ROOM=""
+BB_BLE_MATRIX_TOKEN=""
+if [[ "$enable_ble" =~ ^[yY]$ ]]; then
+    echo "  [1] Open mode (alert on any named device)"
+    echo "  [2] Known mode (alert only for specific devices)"
+    prompt_default ble_mode "BLE mode (1-2)" "1"
+    if [[ "$ble_mode" == "1" ]]; then
+        BB_BLE_MODE="open"
+    elif [[ "$ble_mode" == "2" ]]; then
+        BB_BLE_MODE="known"
+        echo -e "  ${YELLOW}Enter device names one per line (empty line to finish)${NC}"
+        _DEVICE_LIST=""
+        while true; do
+            echo -n -e "    ${CYAN}Device name:${NC} "
+            read -r _DEV_NAME
+            [[ -z "$_DEV_NAME" ]] && break
+            _DEVICE_LIST="${_DEVICE_LIST}${_DEVICE_LIST:+,}${_DEV_NAME}"
+        done
+        BB_BLE_DEVICES="$_DEVICE_LIST"
+    fi
+    prompt_default ble_timeout "Departure timeout (seconds)" "60"
+    BB_BLE_TIMEOUT="$ble_timeout"
+    echo -e "  ${YELLOW}Use same Matrix credentials as network alerter${NC}"
+    prompt_default ble_matrix_hs "Homeserver URL" "${BB_ALERTER_MATRIX_HS:-}"
+    prompt_default ble_matrix_room "Room ID" "${BB_ALERTER_MATRIX_ROOM:-}"
+    prompt_default ble_matrix_token "Bot access token" "${BB_ALERTER_MATRIX_TOKEN:-}"
+    BB_BLE_MATRIX_HS="$ble_matrix_hs"
+    BB_BLE_MATRIX_ROOM="$ble_matrix_room"
+    BB_BLE_MATRIX_TOKEN="$ble_matrix_token"
+fi
+
 # ══════════════════════════════════════════════════════════════════════════════
 # 5. CONFIG SUMMARY
 # ══════════════════════════════════════════════════════════════════════════════
@@ -429,6 +467,7 @@ else
     echo -e "VPN:                ${BOLD}${BB_VPN}${NC}"
 fi
 echo -e "Alerter:            ${BOLD}$([ -n "$BB_ALERTER_TYPE" ] && echo "$BB_ALERTER_TYPE" || echo "disabled")${NC}"
+echo -e "BLE Alerter:        ${BOLD}$([ -n "$BB_BLE_MODE" ] && echo "$BB_BLE_MODE" || echo "disabled")${NC}"
 echo ""
 
 echo -n -e "${CYAN}Proceed with flashing and configuration? (y/n):${NC} "