Scan is made but no connect

[TetianaKolpakova]

Hello @rytilahti
I managed to run this code on Debian 11, Phyton 3.9 and I even can do scan and find my lamp, however when I try to connect and ON / OFF it I get errors:

freya@Dalek:~$ yeelightbt --mac f8:24:41:c3:d9:79 on
WARNING:yeelightbt.connection:Unable to connect to the device f8:24:41:c3:d9:79, retrying: Failed to connect to peripheral f8:24:41:c3:d9:79, addr type: public
ERROR:yeelightbt.connection:Second connection try to f8:24:41:c3:d9:79 failed: Failed to connect to peripheral f8:24:41:c3:d9:79, addr type: public
Traceback (most recent call last):
File "/home/freya/.local/lib/python3.9/site-packages/yeelightbt/connection.py", line 55, in connect
self._conn.connect(self._mac)
File "/home/freya/.local/lib/python3.9/site-packages/bluepy/btle.py", line 445, in connect
self._connect(addr, addrType, iface)
File "/home/freya/.local/lib/python3.9/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 f8:24:41:c3:d9:79, addr type: public

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/bin/yeelightbt", line 33, in
sys.exit(load_entry_point('python-yeelightbt==0.0.4', 'console_scripts', 'yeelightbt')())
File "/home/freya/.local/lib/python3.9/site-packages/click/core.py", line 1130, in call
return self.main(*args, **kwargs)
File "/home/freya/.local/lib/python3.9/site-packages/click/core.py", line 1055, in main
rv = self.invoke(ctx)
File "/home/freya/.local/lib/python3.9/site-packages/click/core.py", line 1654, in invoke
super().invoke(ctx)
File "/home/freya/.local/lib/python3.9/site-packages/click/core.py", line 1404, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/home/freya/.local/lib/python3.9/site-packages/click/core.py", line 760, in invoke
return __callback(*args, **kwargs)
File "/home/freya/.local/lib/python3.9/site-packages/click/decorators.py", line 26, in new_func
return f(get_current_context(), *args, **kwargs)
File "/home/freya/.local/lib/python3.9/site-packages/yeelightbt/cli.py", line 60, in cli
lamp.connect()
File "/home/freya/.local/lib/python3.9/site-packages/yeelightbt/lamp.py", line 89, in connect
self._conn.connect()
File "/home/freya/.local/lib/python3.9/site-packages/yeelightbt/connection.py", line 59, in connect
self._conn.connect(self._mac)
File "/home/freya/.local/lib/python3.9/site-packages/bluepy/btle.py", line 445, in connect
self._connect(addr, addrType, iface)
File "/home/freya/.local/lib/python3.9/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 f8:24:41:c3:d9:79, addr type: public
freya@Dalek:~$

Any advice how to fix this?

[rytilahti]

Sorry, no idea. Looks like a problem in your bluetooth stack, for some reason it cannot form a connection with the device. You could try to use bluetoothctl to connect to the device to see if that works:

❯ bluetoothctl 
Agent registered
[xx]# connect F8:24:41:xx:xx:xx
Attempting to connect to F8:24:41:xx:xx:xx
[CHG] Device F8:24:41:xx:xx:xx Connected: yes
Connection successful
[CHG] Device F8:24:41:xx:xx:xx Name: XMCTD_8A6F
[CHG] Device F8:24:41:xx:xx:xx Alias: XMCTD_8A6F
[CHG] Device F8:24:41:xx:xx:xx ServicesResolved: yes

Note, that this library has not been maintained for years, so even if you get the connection working you will likely need to use a very old version of construct to make the commands work.