how can use gatttool to read data from lywsd02

[ouhaiorg]

Python 3.7.4 (default, Oct 15 2019, 15:58:26)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.

from lywsd02 import Lywsd02Client
mac = 'E7:2E:00:B2:38:35'
client = Lywsd02Client(mac)
print(client.temperature)
Traceback (most recent call last):
File "", line 1, in
File "/usr/local/lib/python3.7/site-packages/lywsd02/client.py", line 44, in temperature
self._get_sensor_data()
File "/usr/local/lib/python3.7/site-packages/lywsd02/decorators.py", line 5, in wrapper
self._peripheral.connect(self._mac)
File "/usr/local/lib/python3.7/site-packages/bluepy/btle.py", line 446, in connect
self._connect(addr, addrType, iface)
File "/usr/local/lib/python3.7/site-packages/bluepy/btle.py", line 439, in _connect
raise BTLEDisconnectError("Failed to connect to peripheral %s, addr type: %s" % (addr, addrType), rsp)
bluepy.btle.BTLEDisconnectError: Failed to connect to peripheral E7:2E:00:B2:38:35, addr type: public

but same system in homeassistant，can read temperature and humidity
I want to use gatttool to find the error

[h4]

In most cases this issue related to distance between sensor and HA server.