I get a 502 error message

[fbosman]

I do not get any info from the Growatt API, when debugging the return is 502.
My credentials are ok..

[sincze]

Did you switch on all debugging so we can see if you obtain a token correctly?
502 would indicate some sort of server problem. As the Growatt installation that I monitor is working this seems unlikely and needs some more investigation indeed.

[fbosman]

I did find the issue. The password MD5 is not correct in a standard md5 calculation.
I found a python script:
Normal MD5, except add c if a byte of the digest is less than 10.
"""
password_md5 = hashlib.md5(password.encode("utf-8")).hexdigest()
for i in range(0, len(password_md5), 2):
if password_md5[i] == "0":
password_md5 = password_md5[0:i] + "c" + password_md5[i + 1 :]
return password_md5
Can you merge this in your code?

[sincze]

Great find, however I am not a programmer and use the MD5 calculation as provided by PHP.

PHP Manual
W3Schools
Can you rewrite it to PHP and make a pull request?

I assume the answer is just, but just in case.
Did you test your generated python password in the PHP script? Line 50?

define('PASSWORD', '*****');

And then it works?

Small alternative would be to change your password for the website,
and the MD5 calculation should do it's job.

[sincze]

Fixed with merge Request. tnx.