BLE gatttool reading serial data from bluno? - raspberry-pi3

Question

I am trying to send data over BLE from Bluno to a Raspberry Pi (Raspian), bluez 5.50.
Whilst the connection seems to be fine. I am struck in a point where am unable to retrieve serial data from notification handle.
Below is what I tried.
pi#raspberrypi:~ $ sudo gatttool -b <BLE-MAC-ADDRESS> -I
<BLE-MAC-ADDRESS>[LE]> connect
Attempting to connect to <BLE-MAC-ADDRESS>
Connection successful
[<BLE-MAC-ADDRESS>][LE]>
Notification handle = 0x0025 value : 32
Notification handle = 0x0025 value : 32
Notification handle = 0x0025 value : 32
Notification handle = 0x0025 value : 32
[<BLE-MAC-ADDRESS>][LE]>char-read-hnd 0x0025
handle : 0x0025 value : 01
Notification handle = 0x0025 value : 32
Notification handle = 0x0025 value : 32
[<BLE-MAC-ADDRESS>][LE]>
So the problem here is , Notification handle listener 'listens' to the serial data and returns the value( 2 -> Hex:32) every 1 second from Bluno (as programmed in Adurinosketch).
But when I try to retrieve this value through the command char-read (tried both by handle & uuid) it always returns 01 ?!!!
Ultimately I want to retrieve this value in my Python code (am using Pexpect for this)
Any help / directions appreciated.

Answer 1

Ok , Here is what I ended up doing in my Python code to retrieve the value
`
child = pexpect.spawn("sudo gatttool -b <BLUNO-MAC-ADDR> -I")
# Connect to the device.
print("Connecting to Bluno...")
child.sendline("connect")
child.expect("Connection successful", timeout=5)
print(" Connected!")
while True:
child.expect("Notification handle = 0x0025 value: ", timeout=10)
child.expect("\r\n", timeout=10)
resp = child.before
print(process_my_data(bytearray.fromhex(resp.decode("utf-8")).decode()))
`