ERROR    [sampling.py:97] battery1 error: <class 'asyncio.exceptions.TimeoutError'>
ERROR    [main.py:240] 1 exceptions occurred fetching BMSs
ERROR    [main.py:85] Error (num 1) reading BMS: 
ERROR    [main.py:86] Stack: Traceback (most recent call last):
  File "/usr/lib/python3.10/asyncio/tasks.py", line 456, in wait_for
    return fut.result()
asyncio.exceptions.CancelledError
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "/app/main.py", line 81, in fetch_loop
    await fn()
  File "/app/main.py", line 241, in fn
    raise exceptions[0]
  File "/app/main.py", line 236, in fn
    await t
  File "/app/bmslib/sampling.py", line 32, in __call__
    return await self.sample()
  File "/app/bmslib/sampling.py", line 45, in sample
    async with bms:
  File "/app/bmslib/bt.py", line 78, in __aenter__
    await self.connect()
  File "/app/bmslib/jikong.py", line 120, in connect
    await self._q(cmd=0x96, resp=(0x02, 0x01))  # device state (resp 0x01 & 0x02)
  File "/app/bmslib/jikong.py", line 138, in _q
    return await self._fetch_futures.wait_for(resp, self.TIMEOUT)
  File "/app/bmslib/__init__.py", line 41, in wait_for
    return await asyncio.gather(*tasks, return_exceptions=False)
  File "/app/bmslib/__init__.py", line 44, in wait_for
    return await asyncio.wait_for(self._futures[name], timeout)
  File "/usr/lib/python3.10/asyncio/tasks.py", line 458, in wait_for
    raise exceptions.TimeoutError() from exc

ERROR    [sampling.py:97] battery1 error: <class 'asyncio.exceptions.TimeoutError'>
ERROR    [main.py:240] 1 exceptions occurred fetching BMSs
ERROR    [main.py:85] Error (num 2) reading BMS: 
ERROR    [main.py:86] Stack: Traceback (most recent call last):
  File "/usr/lib/python3.10/asyncio/tasks.py", line 456, in wait_for
    return fut.result()
asyncio.exceptions.CancelledError
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "/app/main.py", line 81, in fetch_loop
    await fn()
  File "/app/main.py", line 241, in fn
    raise exceptions[0]
  File "/app/main.py", line 236, in fn
    await t
  File "/app/bmslib/sampling.py", line 32, in __call__
    return await self.sample()
  File "/app/bmslib/sampling.py", line 49, in sample
    sample = await bms.fetch()
  File "/app/bmslib/jikong.py", line 167, in fetch
    await self._fetch_futures.wait_for(0x02, self.TIMEOUT)
  File "/app/bmslib/__init__.py", line 44, in wait_for
    return await asyncio.wait_for(self._futures[name], timeout)
  File "/usr/lib/python3.10/asyncio/tasks.py", line 458, in wait_for
    raise exceptions.TimeoutError() from exc
asyncio.exceptions.TimeoutError

asyncio.exceptions.TimeoutError