BLE Callback handler for READ and WRITE events causes the DISCONNECTION

[aasodisen]

Hi,
I am using GPY in Expansion Board 3.1

Pycom MicroPython 1.20.2.rc7 [v1.11-6d01270] on 2020-05-04; GPy with ESP32
Pybytes Version: 1.4.0

Callback handler is working when events are either Bluetooth.CLIENT_CONNECTED and Bluetooth.CLIENT_DISCONNECTED.

Callback handler is NOT working when events are either Bluetooth.CHAR_READ_EVENT and Bluetooth.CHAR_WRITE_EVENT.

My objective is simple; to READ & WRITE Service.Characteristics Values.

from network import Bluetooth

bluetooth = Bluetooth()
bluetooth.set_advertisement(name='GPy', service_uuid=0x1815)

def conn_cb (bt_o):
    events = bt_o.events()
    if  events & Bluetooth.CLIENT_CONNECTED:
        print("Client connected")
    elif events & Bluetooth.CLIENT_DISCONNECTED:
        print("Client disconnected")

bluetooth.callback(trigger=Bluetooth.CLIENT_CONNECTED | Bluetooth.CLIENT_DISCONNECTED, handler=conn_cb)

bluetooth.advertise(True)

srv1 = bluetooth.service(uuid=0x1815, isprimary=True)

chr1 = srv1.characteristic(uuid=0x2A56, permissions=0x180A, properties=Bluetooth.PROP_READ, value=0b01)

def char1_cb_handler(chr):
    events = chr.events()
    if events & Bluetooth.CHAR_READ_EVENT:
        print('Read request on char 1')
    else:
        print('invalid chr1 event')

char1_cb = chr1.callback(trigger=Bluetooth.CHAR_READ_EVENT, handler=char1_cb_handler)

[aasodisen]

FIXED:

from network import Bluetooth

bluetooth = Bluetooth()
bluetooth.set_advertisement(name='GPy', service_uuid=0x1815)

def conn_cb (bt_o):
    events = bt_o.events()
    if  events & Bluetooth.CLIENT_CONNECTED:
        print("Client connected")
    elif events & Bluetooth.CLIENT_DISCONNECTED:
        print("Client disconnected")

bluetooth.callback(trigger=Bluetooth.CLIENT_CONNECTED | Bluetooth.CLIENT_DISCONNECTED, handler=conn_cb)

bluetooth.advertise(True)

srv1 = bluetooth.service(uuid=0x1815, isprimary=True)
chr1 = srv1.characteristic(uuid=0x2A56, properties=Bluetooth.PROP_READ, value=0x01)

def char1_cb_handler(chr, *args):
    events = chr.events()
    if events & Bluetooth.CHAR_READ_EVENT:
        print("Read request on char 1")
    else:
        print("invalid chr1 event")

char1_cb = chr1.callback(trigger=Bluetooth.CHAR_READ_EVENT, handler=char1_cb_handler)