You can check whether the password format is correct from the following aspects:
1. Currently, a password supported by the TuyaSmart app can contain digits, letters, special symbols, and characters in other special languages, such as Arabic and Spanish. Chinese characters are not supported. A password must contain no more than 64 characters.
2. Check whether the password contains spaces, for example, excess spaces at the end of the string.
3. Check whether the first letter of the password is capitalized. Some typing methods often capitalize the first letter by default, but a router password cannot start with an uppercase letter.