import asyncio
import struct

import numpy as np
from bleak import BleakClient
from matplotlib import pyplot as plt

address = "65:72:31:D7:E2:12"
MODEL_NBR_UUID = "2A24"

batt = []


async def main(address):
    async with BleakClient(address) as client:
        model_number = await client.read_gatt_char(MODEL_NBR_UUID)
        print("Model Number: {0}".format("".join(map(chr, model_number))))
        while True:
            # batt.append(ord(await client.read_gatt_char("2A19")))
            batt.append(struct.unpack("b", (await client.read_gatt_char("2A19")))[0])
            print(batt[-1])


try:
    asyncio.run(main(address))
except KeyboardInterrupt:
    changed = np.diff(batt) != 0
    print(
        f"{np.sum(changed)} changes (seconds) in {len(changed)} samples ({len(changed) / np.sum(changed)} samples per second)"
    )

    plt.plot(batt)
    plt.show()
    plt.show()