ss5_ble_timestamp2

import struct
import datetime

# 現在時刻を4バイトに
def current_time_to_byte():
    current_time_interval_since_epoch = datetime.datetime.now(datetime.timezone.utc).timestamp()
    timestamp_uint32 = int(current_time_interval_since_epoch) & 0xFFFFFFFF
    timestamp_data = struct.pack('<I', timestamp_uint32)
    return timestamp_data

# 4バイトを文字列に（デバッグ用）
def byte_to_datetime_string(four_bytes: bytes) -> str:
    unpacked_uint32_value = struct.unpack('<I', four_bytes)[0]
    seconds_from_epoch = unpacked_uint32_value
    dt_object = datetime.datetime.fromtimestamp(seconds_from_epoch, tz=datetime.timezone.utc)
    return dt_object.strftime("%Y-%m-%d %H:%M:%S (UTC)")