python ชั่งน้ำหนัก

Bluetooth Scale in Python (Sinocare CK-793, ETEKCITY, likely others built on the same chipset)

import asyncio

import sys

from bleak import BleakClient

import bleak.exc

address = sys.argv[1]

char_uuid = "0000fff4-0000-1000-8000-00805f9b34fb"

first_connect = True

def callback(sender: int, data: bytearray):

grams = int.from_bytes(data[3:5], byteorder="little")

print(f"{grams}g")

async def run(address):

async with BleakClient(address) as client:

global first_connect

if first_connect:

print("Connected.")

first_connect = False

notify = await client.start_notify(char_uuid, callback)

loop = asyncio.get_event_loop()

while(True):

try:

loop.run_until_complete(run(address))

except bleak.exc.BleakDBusError:

pass

except KeyboardInterrupt:

print()

sys.exit(0)