BLE5 on raspberry pi (sender) receiver not yet

https://greenlion994.sakura.ne.jp/embedded/2022/08/009-2/ echo ...

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https://qiita.com/comachi/items/c494e0d6c6d1775a3748

python 3 code as data sending peripheral 

from pybleno import *

bleno = Bleno()

APPROACH_SERVICE_UUID = '13A28130-8883-49A8-8BDB-42BC1A7107F4'

APPROACH_CHARACTERISTIC_UUID = 'A2935077-201F-44EB-82E8-10CC02AD8CE1'

class ApproachCharacteristic(Characteristic):

    def __init__(self):

        Characteristic.__init__(self, {

            'uuid': APPROACH_CHARACTERISTIC_UUID,

            'properties': ['read', 'notify'], #読まれるだけのキャラクタ

            'value': None

        })

        self._value = str(0).encode()

        self._updateValueCallback = None

    def onReadRequest(self, offset, callback):

        print('ApproachCharacteristic - onReadRequest')

        callback(result=Characteristic.RESULT_SUCCESS, data=self._value)

    def onSubscribe(self, maxValueSize, updateValueCallback):

        print('ApproachCharacteristic - onSubscribe')

        self._updateValueCallback = updateValueCallback

    def onUnsubscribe(self):

        print('ApproachCharacteristic - onUnsubscribe')

        self._updateValueCallback = None

def onStateChange(state):

    print('on -> stateChange: ' + state)

    if (state == 'poweredOn'):

        bleno.startAdvertising(name='Approach', service_uuids=[APPROACH_SERVICE_UUID])

    else:

        bleno.stopAdvertising()

bleno.on('stateChange', onStateChange)

approachCharacteristic = ApproachCharacteristic()

def onAdvertisingStart(error):

    print('on -> advertisingStart: ' + ('error ' + error if error else 'success'))

    if not error:

        bleno.setServices([

            BlenoPrimaryService({

                'uuid': APPROACH_SERVICE_UUID,

                'characteristics': [

                    approachCharacteristic

                ]

            })

        ])

bleno.on('advertisingStart', onAdvertisingStart)

bleno.start()

import time

counter = 0

def task():

    global counter

    counter += 1

    approachCharacteristic._value = str(counter).encode()

    if approachCharacteristic._updateValueCallback:

        print('Sending notification with value : ' + str(approachCharacteristic._value))

        notificationBytes = str(approachCharacteristic._value).encode()

        approachCharacteristic._updateValueCallback(data=notificationBytes)

while True:

    task()

    time.sleep(1)