diff --git a/meta-venus/recipes-core/udev/files/bt-config b/meta-venus/recipes-core/udev/files/bt-config
index db31ec306..1cc6e9b9b 100644
--- a/meta-venus/recipes-core/udev/files/bt-config
+++ b/meta-venus/recipes-core/udev/files/bt-config
@@ -34,8 +34,9 @@ if hciconfig $HCI | grep -qw RAW; then
     usleep 200000
 fi
 
-btmgmt -i $HCI le on
-btmgmt -i $HCI bredr off
+# btmgmt can hang when started by udev. Piping with yes prevents that.
+yes | btmgmt -i $HCI le on
+yes | btmgmt -i $HCI bredr off
 
 # start services, or restart them if already running
 services="/service/dbus-ble-sensors /service/vesmart-server"