Python/Raspberry Pi handle Notification from ESP32 BLE_notify example

It's a Python3 example code (using bluepy library) run on Raspberry Pi, connect to ESP32 BLE server (programmed with BLE_notify example), and handle the Notification from ESP32.

Where address, service_uuid and char_uuid have to match with ESP32 side.

pyBLE_test_waitNotification_20210120a.py

"""
ref:
bluepy Documentation: Working with notifications
http://ianharvey.github.io/bluepy-doc/notifications.html
"""
# Python3 example on Raspberry Pi to handle notification from
# ESP32 BLE_notify example.
#
# To install bluepy for Python3:
# $ sudo pip3 install bluepy

from bluepy import btle

class MyDelegate(btle.DefaultDelegate):
    def __init__(self):
        btle.DefaultDelegate.__init__(self)
        # ... initialise here

    def handleNotification(self, cHandle, data):
        # ... perhaps check cHandle
        # ... process 'data'
        #print(type(data))
        #print(dir(data))
        print(data)
        print(data[0])


# Initialisation  -------
address = "24:0a:c4:e8:0f:9a"
service_uuid = "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
char_uuid = "beb5483e-36e1-4688-b7f5-ea07361b26a8"

p = btle.Peripheral(address)
p.setDelegate(MyDelegate())

# Setup to turn notifications on, e.g.
svc = p.getServiceByUUID(service_uuid)
ch = svc.getCharacteristics(char_uuid)[0]
"""
print(type(ch))
print(ch)
print(dir(ch))

peripheral = ch.peripheral
print(type(peripheral))
print(peripheral)

propNames = ch.propNames
print(type(propNames))
print(propNames)

properties = ch.properties
print(type(properties))
print(properties)
"""

"""
Remark for setup_data for bluepy noification-
Actually I don't understand how come setup_data = b"\x01\x00",
and ch.valHandle + 1.
Just follow suggestion by searching in internet:
https://stackoverflow.com/questions/32807781/
ble-subscribe-to-notification-using-gatttool-or-bluepy
"""
setup_data = b"\x01\x00"
#ch.write(setup_data)
p.writeCharacteristic(ch.valHandle + 1, setup_data)

ch_data = p.readCharacteristic(ch.valHandle + 1)
print(type(ch_data))
print(ch_data)

print("=== Main Loop ===")

while True:
    if p.waitForNotifications(1.0):
        # handleNotification() was called
        continue

    #print("Waiting...")
    # Perhaps do something else here

Next:

~ BLE Notification example: Python/Raspberry Pi read notification from ESP32 BLE server to display Analog Input