"Network Error: Unable to Connect" with Smart Outdoor Socket

[vfdev-5]

Hi,

First of all, thanks for the project. I'm discovering it and I'm trying to connect to my smart outdoor socket (made by greensun but powered by tuya).

When I scan for devices: python -m tinytuya scan, I can discover the socket but "local_key" is empty:

TinyTuya (Tuya device scanner) [1.11.0]

Scanning on UDP ports 6666 and 6667 and 7000 for devices for 18 seconds...

Unknown v3.3 Device                                   Product ID = keym9qkuywghyrvs  [Valid Broadcast]:
    Address = 192.168.1.60   Device ID = bf*******op (len:22)  Local Key =   Version = 3.3  Type = default, MAC = 
    No Stats for 192.168.1.60: DEVICE KEY required to poll for status
Scan completed in 18.0458 seconds                  

Scan Complete!  Found 1 devices.
Broadcasted: 1
Versions: 3.3: 1
Unknown Devices: 1

>> Saving device snapshot data to snapshot.json

When I try to connect and get status, there is an error is reported:

device_id = "bf*******op"
ip_address = "192.168.1.60"
local_key = ""
version = "3.3"

tinytuya.set_debug(True)

d = tinytuya.OutletDevice(device_id, ip_address, local_key, version=version)
data = d.status() 
print("Device status: ", data)

Output:

DEBUG:sending payload
DEBUG:Network connection error in _send_receive() - retry 6/5
Traceback (most recent call last):
  File "/opt/conda/lib/python3.9/site-packages/tinytuya/core.py", line 951, in _send_receive
    enc_payload = self._encode_message(payload) if type(payload) == MessagePayload else payload
  File "/opt/conda/lib/python3.9/site-packages/tinytuya/core.py", line 1301, in _encode_message
    payload = self.cipher.encrypt(payload, False)
  File "/opt/conda/lib/python3.9/site-packages/tinytuya/core.py", line 244, in encrypt
    cipher = AES.new(self.key, mode=AES.MODE_ECB)
  File "/opt/conda/lib/python3.9/site-packages/Crypto/Cipher/AES.py", line 228, in new
    return _create_cipher(sys.modules[__name__], key, mode, *args, **kwargs)
  File "/opt/conda/lib/python3.9/site-packages/Crypto/Cipher/__init__.py", line 79, in _create_cipher
    return modes[mode](factory, **kwargs)
  File "/opt/conda/lib/python3.9/site-packages/Crypto/Cipher/_mode_ecb.py", line 216, in _create_ecb_cipher
    cipher_state = factory._create_base_cipher(kwargs)
  File "/opt/conda/lib/python3.9/site-packages/Crypto/Cipher/AES.py", line 90, in _create_base_cipher
    raise ValueError("Incorrect AES key length (%d bytes)" % len(key))
ValueError: Incorrect AES key length (0 bytes)
DEBUG:Exceeded tinytuya retry limit (5)
DEBUG:Unable to connect to device 
DEBUG:ERROR Network Error: Unable to Connect - 901 - payload: null
DEBUG:status() received data={'Error': 'Network Error: Unable to Connect', 'Err': '901', 'Payload': None}

Device status:  {'Error': 'Network Error: Unable to Connect', 'Err': '901', 'Payload': None}

Any hints how to fix this issue ? Thanks

[vfdev-5]

I solved this issue by fetching local_key using python3 -m tinytuya wizard and creating cloud account etc... (I was hoping that it was not necessary)

[jasonacox]

Thanks for opening this @vfdev-5

Yes, unfortunately that is the necessary step to decrypt the payloads. Do you have any suggestions on how we could improve the README directions? We may not have made that clear.

[vfdev-5]

I think the README is rather clear if I reread it right now. Maybe, at the first time of reading, I had a question about the sentence "Local_Key - The security key required to access the Tuya device." from Tuya Device Preparation section, like how can we get it. Then I saw scan and I thought that it could be enough...

Probably a nit update could be:

- Local_Key - The security key required to access the Tuya device.
+ Local_Key - The security key required to access the Tuya device. To obtain it the first time please follow the [next steps](https://github.com/jasonacox/tinytuya#setup-wizard---getting-local-keys) (there is no other way of getting it).

and

- Setup Wizard - Getting Local Keys 
+ Setup Wizard - Getting Local Keys (Required)

Otherwise, reading the README carefully helps as well :)