P100 - Failed to initialize protocol AuthProtocol

[saepien]

I have a P115 Smart Plug

Failed to initialize protocol AuthProtocol
Traceback (most recent call last):
File "/Users/storm/dev/sandbox/tapo/env/lib/python3.13/site-packages/PyP100/PyP100.py", line 35, in _initialize
protocol.Initialize()
~~~~~~~~~~~~~~~~~~~^^
File "/Users/storm/dev/sandbox/tapo/env/lib/python3.13/site-packages/PyP100/auth_protocol.py", line 110, in Initialize
raise Exception("Failed to authenticate")
Exception: Failed to authenticate
Error: {'error_code': 1003}
Failed to initialize protocol OldProtocol
Traceback (most recent call last):
File "/Users/storm/dev/sandbox/tapo/env/lib/python3.13/site-packages/PyP100/PyP100.py", line 35, in _initialize
protocol.Initialize()
~~~~~~~~~~~~~~~~~~~^^
File "/Users/storm/dev/sandbox/tapo/env/lib/python3.13/site-packages/PyP100/auth_protocol.py", line 244, in Initialize
result = self._request_raw("handshake", {"key": public_key})
File "/Users/storm/dev/sandbox/tapo/env/lib/python3.13/site-packages/PyP100/auth_protocol.py", line 173, in _request_raw
raise Exception(f"Error code: {data['error_code']}")
Exception: Error code: 1003
Traceback (most recent call last):
File "", line 1, in
p100.turnOn()
~~~~~~~~~~~^^
File "/Users/storm/dev/sandbox/tapo/env/lib/python3.13/site-packages/PyP100/PyP100.py", line 95, in turnOn
return self.set_status(True)
~~~~~~~~~~~~~~~^^^^^^
File "/Users/storm/dev/sandbox/tapo/env/lib/python3.13/site-packages/PyP100/PyP100.py", line 92, in set_status
return self._set_device_info({"device_on": status})
~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/storm/dev/sandbox/tapo/env/lib/python3.13/site-packages/PyP100/PyP100.py", line 64, in _set_device_info
return self.request("set_device_info", params)
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/storm/dev/sandbox/tapo/env/lib/python3.13/site-packages/PyP100/PyP100.py", line 46, in request
self._initialize()
~~~~~~~~~~~~~~~~^^
File "/Users/storm/dev/sandbox/tapo/env/lib/python3.13/site-packages/PyP100/PyP100.py", line 42, in _initialize
raise Exception("Failed to initialize protocol")
Exception: Failed to initialize protocol

[almottier]

Could you make sure your credentials are correct using the official website:
https://tapo.tplinkcloud.com/tapo_web/#/login/signIn

[danricho]

I have the same issue with one of my 4 P100s which was recently commissioned.
My login is working in the link above.

Failed to initialize protocol AuthProtocol
Traceback (most recent call last):
  File "/share/tapo/venv/lib/python3.9/site-packages/PyP100/PyP100.py", line 35, in _initialize
    protocol.Initialize()
  File "/share/tapo/venv/lib/python3.9/site-packages/PyP100/auth_protocol.py", line 110, in Initialize
    raise Exception("Failed to authenticate")
Exception: Failed to authenticate
Error: {'error_code': 1003}
Failed to initialize protocol OldProtocol
Traceback (most recent call last):
  File "/share/tapo/venv/lib/python3.9/site-packages/PyP100/PyP100.py", line 35, in _initialize
    protocol.Initialize()
  File "/share/tapo/venv/lib/python3.9/site-packages/PyP100/auth_protocol.py", line 244, in Initialize
    result = self._request_raw("handshake", {"key": public_key})
  File "/share/tapo/venv/lib/python3.9/site-packages/PyP100/auth_protocol.py", line 173, in _request_raw
    raise Exception(f"Error code: {data['error_code']}")
Exception: Error code: 1003

I am also having a "KLAP handshake failed" error using this homebridge plugin. All other P100s are working with this as well.

[JanusHL]

Same issue with tapo version 1.4.0 build 250901 rel. 175625. I had automatic updates on, and the new release hangs the connection...

Error: {'error_code': 1003} Failed to initialize protocol OldProtocol

Could be "OldProtocol" is the cause of error? and how can I switch to the NewProtocol?

Thank you in advance

[JanusHL]

Umm, I have check the new protocol and I receive the same error...

It seems the error is caused by "requests" module...

raise HTTPError(http_error_msg, response=self) requests.exceptions.HTTPError: 403 Client Error: Forbidden for url: http://192.168.20.103/app/handshake1

[almottier]

check this if you are using version 1.4.0 : #35 (comment)

[JanusHL]

I don't see this option in my config, only Alexa, google Samsung and something named IFTTT...

[almottier]

I don't see this option in my config, only Alexa, google Samsung and something named IFTTT...

try to update the Tapo app

[JanusHL]

I've updated the app and now appears the option and finally the script works...

Thank you almottier.

JanusHL

[Xylvier]

Thanks for the solution altmottier!, it was just so damn hard to find again.

I used your repository before, eventually installed multiple different versions and none worked, only to search for a version that contains the "get_status()" function, leading me back here. Still didn't work, until in a comment I found that the "3rd party connections" need to be allowed in the "Tapo App". Long story short, one damn setting can lead you down a rabbit hole, and I would love to help others avoid that dilemma.

Therefore I would like to ask @almottier to please include the fact that the repository works with "Tapo P100 plugs firmware 1.4.0" ONLY if the "Third-Party Compatibility" is activated.
The setting can be found in the "TAPO App" under "Me > Third-Party-Services > Third-Party Compatibility".

I take no credit here, as the information is essentially already spread out over the issues, but that sadly made it impossible to find the solution (search engines, even AI won't find the associated facts here), which is sad.

So please add the collected information in one place, for future searches.

Best regards,
Patrick

[almottier]

Hello @Xylvier, I updated the project readme, thanks.

[Xylvier]

It's been a while... and I found myself once again having the same problem with the authentication, I swear I tried all the same solutions again and it did not work. I have the app on my phone and could access it from there, 3rd party applications turned on as well. The code on the other hand, no changes (it worked back then, now, not so much).

I recently changed phones and while the application got transferred and works, there was something off, so I tried to change my password in the app, using the password I used in the code to authenticate, BIG surprise I got told the password was invalid!

I went online and requested a new password, which gives you a link....
After the new password was in place, the code ran, first try, no error.
Application on my phone told me I had to log in again.

So what do we make of that, phone app can work, code does not, error does not say password is wrong, BUT it can be the reason!
For all those that tried everything and still struggle, maybe try resetting the password and updating it in the code.

That said, thanks for sharing the help so far, I just thought since this is the place where most helpful information was condensed I'd share the latest weird, but solved issue "related".

Best regards,
Patrick