How to subscribe to a channel using Jquery to read data in your channel

Hi Team

I am trying to read API key to my channel, using jquery to get JSON response to my channel. Here is my jquery logic, i am unable to get a response to my channel i have created and i want to read one field from my channel (field8) only.

<script
src="https://code.jquery.com/jquery-3.3.1.js"integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60="crossorigin="anonymous"></script>
<script type="text/javascript">
  
  function loadData(){
  
    var id;
    
    //get the data from thingspeak.
    $.getJSON('https://api.thingspeak.com/channels/899906/fields/8.json?api_key=F35GLOFJ8L99D0OM&results=2',function(data) {
     
    id = data.field8;
    
      if(id){
      displayData(id);
      }
    });
 
  }
          
</script>

Answer 1

[Yousef]

Here is how you can read a specific field from a JSON response in MATLAB using the JSONlab toolbox:

1. Install JSONlab toolbox if you don't already have it:

pkg install -forge jsonlab

1. Make a GET request to your API endpoint to get the JSON response:

url = 'https://api.thingspeak.com/channels/YOUR_CHANNEL_ID/feeds.json?api_key=YOUR_API_KEY';

json_text = webread(url);

1. Parse the JSON text into a MATLAB struct:

json = jsondecode(json_text);

1. Access the specific field you want from the struct (field8 in this example):

field8_data = json.feeds(1).field8;

The field8_data variable will now contain the data for field8 from the first entry in the feeds array.

You can loop through all entries to access field8 for each:

for i = 1:length(json.feeds)

field8(i) = json.feeds(i).field8;

end