ble_hid_keyboard.py : connect ok but non character on screen

[picpic020960]

Bonjour ,
I test https://github.com/dpgeorge/micropython/blob/examples-bluetooth-ble-hid/examples/bluetooth/ble_hid_keyboard.py from dpgeorge folder with bluetooth Huawei P20
The bluetooth pairing is ok but no character on the screen.
Mistake or Real issue ?
How to debug ?
Thanks for help

'''
MicroPython v1.22.2 on 2024-02-22; Generic ESP32 module with ESP32
Type "help()" for more information.

import ble_hid_keyboard as a
((21, 23, 25, 27, 29, 31, 32, 34),)
connect
event: 27 (0, 6, 0, 500, 0)
event: 28 (0, 1, 0, 1, 16)
event: 27 (0, 36, 0, 500, 0)
event: 4 (0, 21)
event: 4 (0, 23)
event: 4 (0, 23)
event: 4 (0, 23)
a.send_str("azertyui")
--> 0 4
--> 0 29
--> 0 8
--> 0 21
--> 0 23
--> 0 28
--> 0 24
--> 0 12
'''

[rena2019]

I tried the script with 2 different devices:
Android Smartphone: Google Pixel 3

MicroPython v1.23.0-preview.368.gfa23e4b09 on 2024-05-13; Generic ESP32S3 module with ESP32S3

Type "help()" for more information.
>>> import ble_hid_keyboard as a
((21, 23, 25, 27, 29, 31, 32, 34),)
>>> connect
event: 29 (2, 0, None)
event: 29 (1, 0, <memoryview>)
event: 29 (2, 0, <memoryview>)
event: 28 (1, 1, 0, 1, 16)
event: 30 (1, <memoryview>, <memoryview>)
event: 29 (1, 0, <memoryview>)
event: 30 (2, <memoryview>, <memoryview>)
event: 29 (1, 0, <memoryview>)
event: 27 (1, 6, 0, 500, 0)
event: 4 (1, 21)
event: 4 (1, 23)
event: 4 (1, 23)
event: 27 (1, 36, 0, 500, 0)
event: 4 (1, 23)

>>> a.send_str("azertyui")

no characters received.
And with my Windows 10 Notebook:

MicroPython v1.23.0-preview.368.gfa23e4b09 on 2024-05-13; Generic ESP32S3 module with ESP32S3

Type "help()" for more information.
>>> import ble_hid_keyboard as a
((21, 23, 25, 27, 29, 31, 32, 34),)
>>> connect
event: 21 (1, 256)
event: 29 (2, 0, None)
event: 29 (1, 0, <memoryview>)
event: 29 (2, 0, <memoryview>)
event: 28 (1, 1, 0, 1, 16)
event: 30 (1, <memoryview>, <memoryview>)
event: 29 (1, 0, <memoryview>)
event: 30 (2, <memoryview>, <memoryview>)
event: 29 (1, 0, <memoryview>)
event: 27 (1, 16, 0, 960, 0)
event: 4 (1, 34)
event: 4 (1, 31)
event: 4 (1, 27)
event: 4 (1, 23)
event: 4 (1, 21)
event: 27 (1, 48, 0, 960, 0)
event: 27 (1, 12, 0, 200, 0)
event: 2 (1, 0, <memoryview>)

>>> a.send_str("azertyui")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "ble_hid_keyboard.py", line 125, in send_str
  File "ble_hid_keyboard.py", line 119, in send_char
OSError: -128