E-ink display ESP32/waveshare

[aardkop]

Hello all,

I have a question, currently im working on a 4.2inch waveshare display with a ESP32.
Im not a big coder and i combine scripts from all over the web, currently im goining in the right way but i'm having problems with parsing the json file.
at the moment i read the whole json output (/json.htm?type=devices&used=true&displayhidden=1) and run it thrue the ArduinoJson assistant website, but there is too much data and i get only a small part of my devices.

My question is:

Is there a way to read the json and pick specific devices on thair IDX and read the value from it without all the other parameters i dont use.

I hope somone can put me in the richt direction.