Adapter /org/bluez/3954/hci0
Device "/org/bluez/3954/hci0/dev_00_0F_6F_00_0E_63"

Command is dbus-send --system --type=method_call --print-reply --dest=org.bluez "/org/bluez/3954/hci0/dev_00_0F_6F_00_0E_63" org.bluez.Serial.Connect , sending now

process 4334: arguments to dbus_message_new_method_call() were incorrect, assertion "_dbus_check_is_valid_path (path)" failed in file dbus-message.c line 1078.
This is normally a bug in some application using the D-Bus library.

process 4334: arguments to dbus_message_set_auto_start() were incorrect, assertion "message != NULL" failed in file dbus-message.c line 2492.
This is normally a bug in some application using the D-Bus library.
Couldn't allocate D-Bus message