Hey,
thank you for your help. I still cannot make it work. I created a new simple dummy database just few rows to test everything. And the graph is still empty This time I took the id from the database and the temperature. So the json output was: [{"id":1,"temp":23},{"id":2,"temp":28},{"id":3,"temp":20},{"id":4,"temp":44},{"id":5,"temp":10}] The values were only numeric. But the chart is still empty.
[{"id":1,"temp":23},{"id":2,"temp":28},{"id":3,"temp":20},{"id":4,"temp":44},{"id":5,"temp":10}]
Here is the link to my Google Drive with the required files. Link Thank you for your help.