You may be experiencing #38. Can you print the headers that come back in the response to the request (print(r.headers))? It would also be helpful for test purposes to print the response content (or text) instead of the JSON (print(r.content)), you may see partial (or no) data.

From Python:
Fetching JSON data from http://192.168.178.26/api/-lxlSLEO1If8kEjry2ar2jrv6c4WhZEZdrJJNdU4
{'date': 'Wed, 11 Jan 2023 15:02:18 GMT', 'pragma': 'no-cache', 'expires': 'Mon, 1 Aug 2011 09:00:00 GMT', 'content-type': 'application/json', 'x-content-type-options': 'nosniff', 'server': 'nginx', 'connection': 'close', 'access-control-allow-methods': 'POST, GET, OPTIONS, PUT, DELETE, HEAD', 'access-control-allow-headers': 'Content-Type', 'content-security-policy': "default-src 'self'", 'access-control-allow-credentials': 'true', 'access-control-max-age': '3600', 'cache-control': 'no-store', 'access-control-allow-origin': '*', 'x-frame-options': 'SAMEORIGIN', 'x-xss-protection': '1; mode=block', 'referrer-policy': 'no-referrer'}

From Hue Bridge:
Access-Control-Allow-Credentials: true
Access-Control-Allow-Headers: Content-Type
Access-Control-Allow-Methods: POST, GET, OPTIONS, PUT, DELETE, HEAD
Access-Control-Allow-Origin: *
Access-Control-Max-Age: 3600
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0, no-store
Connection: close
Content-Security-Policy: default-src 'self'
Content-Type: application/json
Date: Wed, 11 Jan 2023 14:56:16 GMT
Expires: Mon, 1 Aug 2011 09:00:00 GMT
Pragma: no-cache, no-cache
Referrer-Policy: no-referrer
Server: nginx
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,/;q=0.8
Accept-Encoding: gzip, deflate
Accept-Language: de,en-US;q=0.7,en;q=0.3
Connection: keep-alive
Host: 192.168.178.26
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0

One further info. I can fire a event once a time before the syntax error occurs.
For example: my_bridge.set_light(48, on=True) is turning light 48 on, but than code crashed.

Those seem to be OK, except that there's no content-length or chunked encoding. There is an open PR #123 to handle that case. You could test the library code in that PR.

What do you get when you print(r.content) instead of print(r.json)?

response.json():
Traceback (most recent call last):
File "code.py", line 54, in
File "adafruit_requests.py", line 419, in json
ValueError: syntax error in JSON

response.content:
b''

I guess both contents are empty

You've verified that the JSON is valid, so I'd suggest downloading the requests library code from the PR above and seeing if that helps.

(wait a full minute or more for the response, or put in a smaller timeout in requests, e.g., r = requests.get(TEXT_URL, timeout=10))

Thanks, i will run some tests with PR #123 and reply with an update.

Currently the test seems to be stable. The error can be reproduced only when request.get will be executed quite often or during or the json file is huge. But this can be handled. Definetely the Timeout is an improvement.
Thanks.

Closing as fixed by #123