I have a Fit2live weigh scale unfortunately their app is not working in my country. So, I decided to create my own using python (just for my personal use). I was able to connect to the scale (it uses Chipsea BLE CST34M97) and pull the actual weight in the scale but having difficulty in get other metrics (see details below). Can someone help me get the other measurement correctly?

import asyncio
from bleak import BleakClient

async def read_characteristic(address, characteristic_uuid):
    async with BleakClient(address) as client:

        def callback(sender, data):
            print(f"Notification from {sender}: {data}")
            # Decoding the body composition measurement based on the correct sequence
            weight = int.from_bytes(data[11:13], byteorder='little') / 10
            bmi = int(data[2])   # Byte 2,
            fat_percentage = int.from_bytes(data[2:4],byteorder='little')*1.25#int(data[3]) / 10  # Byte 3, scaled by 10
            visceral_fat = int.from_bytes(data[4:6],byteorder='little')#int(data[4])  # Byte 4 (Visceral fat level)
            muscle_mass = int.from_bytes(data[6:7], byteorder='little') / 10  # Bytes 5-6, scaled by 10
            bone_mass = int.from_bytes(data[7:9], byteorder='little') / 10  # Bytes 7-9, scaled by 10
            bmr = int.from_bytes(data[9:11], byteorder='little')/2  # Bytes 9-11 (BMR in kcal)
            body_water = int.from_bytes(data[11:13], byteorder='little') / 10  # Bytes 11-13, scaled by 10

            print("Body Composition Measurement:")
            print(f"Weight: {weight:.2f} kg")
            print(f"BMI: {bmi:.1f}")
            print(f"Fat Percentage: {fat_percentage:.1f}%")
            print(f"Visceral Fat: {visceral_fat}")
            print(f"Muscle Mass: {muscle_mass:.2f} kg")
            print(f"Bone Mass: {bone_mass:.2f} kg")
            print(f"BMR: {bmr} kcal")
            print(f"Body Water: {body_water:.1f}%")


        await client.start_notify(characteristic_uuid, callback)
        await asyncio.sleep(5) 
        await client.stop_notify(characteristic_uuid)

        

address = "C0:00:00:00:7D:45" 
characteristic_uuid = "00002a9c-0000-1000-8000-00805f9b34fb" 

asyncio.run(read_characteristic(address, characteristic_uuid))

Result Notification from 00002a9c-0000-1000-8000-00805f9b34fb (Handle: 30): Body Composition Measurement: bytearray(b'\x06\x03\x15\x00\x11\x01\x01\x00\x00\x80\x13\xd6\x02\x00\x00\x04\x00\x00\x00\x00')

Body Composition Measurement:

Weight: 72.60 kg (correct)

BMI: 21.0 (Not sure)

Fat Percentage: 26.2% (not sure)

Visceral Fat: 273 (not sure)

Muscle Mass: 0.10 kg (incorrect)

Bone Mass: 0.00 kg (incorrect)

BMR: 2496.0 kcal (not sure)

Body Water: 72.6% (incorrect)