An OBS script that displays your heart rate as reported by a Huawei smart watch in HR Data Broadcast Mode, requires bleak (pip install bleak)

HuaweiHRP_OBS.py

#By HDR
#https://gist.github.com/HDR/02cec215db1e97349008e80a3116a189
#V1.0
import obspython as obs
import asyncio
import threading
from bleak import BleakScanner, BleakClient

source_name = "Heart Rate"
current_text = "Awaiting Connection..."
huawei_device = None
huawei_heartrate_char_uuid = "00002a37-0000-1000-8000-00805f9b34fb"
huawei_device_lock = threading.Lock()

async def handler(sender, data):
    heart_rate = data[1]
    global current_text
    current_text = f"{heart_rate} BPM"

def update_text():
    global current_text
    source = obs.obs_get_source_by_name(source_name)
    if source is None:
        source = obs.obs_source_create("text_gdiplus", source_name, None, None)
        scene = obs.obs_frontend_get_current_scene()
        scene_item = obs.obs_scene_add(scene, source)

    settings = obs.obs_data_create()
    obs.obs_data_set_string(settings, "text", current_text)
    obs.obs_source_update(source, settings)
    obs.obs_data_release(settings)
    obs.obs_source_release(source)

def script_description():
    return "Gets your current heart rate from a Huawei smart watch and displays it on screen\n\nMade by HDR"

def script_update(settings):
    global source_name
    global current_text
    source_name = obs.obs_data_get_string(settings, "source_name")
    update_text()

def script_defaults(settings):
    obs.obs_data_set_default_string(settings, "source_name", "Heart Rate")

def script_properties():
    props = obs.obs_properties_create()
    obs.obs_properties_add_text(props, "source_name", "Source Name", obs.OBS_TEXT_DEFAULT)
    return props

def start_bluetooth():
    loop = asyncio.new_event_loop()
    asyncio.set_event_loop(loop)
    loop.run_until_complete(connect())

async def connect():
    print("Scanning for a Huawei device in HR Data Broadcast mode")
    devices = await BleakScanner.discover()
    
    global huawei_device
    
    for device in devices:
        if "HUAWEI" in (device.name or ""):
            with huawei_device_lock:
                huawei_device = device.address
            
        if huawei_device:
            print(f"Found Huawei device address: {huawei_device}")
            async with BleakClient(device) as client:
                await client.start_notify(huawei_heartrate_char_uuid, handler)
                while True:
                    await asyncio.sleep(0.5)
        else:
            global current_text
            current_text = "Connection failed: Please enable HR Data Broadcast"
            update_text()
            return

def script_load(settings):
    thread = threading.Thread(target=start_bluetooth)
    thread.start()
    obs.timer_add(update_text, 500)