BLUETOOTH - Linux: Changing advertisement of appearance with bluetoothctl fails

I like to use a RaspberryPi to act as HeartRate Sensor and transmit these data via BLTH to other Health/Sport-Apps. Finally all is working fine with python and bluez I'm able to create a BLTH GATT Server and advertise HR-Data via Service 0x180d.

The last problem is I'm not able to change the Appearance of the BLTH in Generic Access (0x1800). Apprearance is to find here with UUID: 0x2A01.

I tryed to do this the manual way via bluetoothctl: menu advertise appearance 833 (for HeartRate) appearance on back advertise on

This will fail with: Failed to register advertisement: org.bluez.Error.Failed

nevermind to which value i change the apperance (also if the value is well known and accepted) it fail the advertisement. If i switch appearance off it will start advertisment. Any hint, what do to or what I just missed? I already updated bluez from 5.50 to 5.54 also used bluez in experimental mode

and using newest raspian os with all updates

Many thanks for help

Solution

These are the steps that I used on my Raspberry Pi:

pi@raspberrypi:~ $ bluetoothctl 
[bluetooth]# menu advertise 
[bluetooth]# clear
[bluetooth]# uuids 0x180D
[bluetooth]# appearance 833
[bluetooth]# name heart_test
[bluetooth]# discoverable on
[bluetooth]# back
[bluetooth]# advertise on
[CHG] Controller 00:02:5B:03:44:07 SupportedInstances: 0x04
[CHG] Controller 00:02:5B:03:44:07 ActiveInstances: 0x01
Advertising object registered
UUID: Heart Rate(0x180D)
Tx Power: off
LocalName: heart_test
Appearance: Heart Rate Belt (0x0341)
Discoverable: on
[bluetooth]#

And it gave me this on me this in the nRF app when I scanned for it: