This snippets sets the amperage of a NRGkick charging cable

bt_replay_nrgkick.py

from typing import Union
import asyncio

from bleak import BleakClient
from bleak.backends.device import BLEDevice


async def main(address: Union[BLEDevice, str]) -> None:
    async with BleakClient(address) as client:
        await client.pair()
        print(client.is_connected)

        for amperage in range(6, 13 + 1):
            await client.write_gatt_char(
                char_specifier='ecbb79c5-6972-47ce-abbe-787a003c4f5d',
                data=bytes.fromhex(
                    f'0200420a2c0802180120022a2431396234656165382d333239662d343266352d396239642d656361366133333734353964120a0a0865363761653239391a0622040a0208{amperage:02x}'
                ),
                response=True
            )

            await asyncio.sleep(1)


if __name__ == "__main__":
    address = "34:94:54:xx:xx:xx"  # CHANGE ME
    asyncio.run(main(address))