MATLAB ANALYSIS run Successfully on ThingSpeak, BUT always generates Server Error 500, so doesn't send email

The error is:

"Failed to send alert: The server returned the status 500 with message "Internal Server Error" in response to the request to URL https://api.thingspeak.com/alerts/send."

The message says MATLAB Analysis ran successfully, so the code is good, but never sends the email because of the server error.

Simple code from examples:

 % Catch errors so the MATLAB code does not disable a TimeControl if it fails
try
    webwrite(alertUrl , "body", alertBody, "subject", alertSubject, options);
catch someException
    fprintf("Failed to send alert: %s\n", someException.message);
end

Where to go from here?

Answer 1

[Vinod]

Here's the code I used to test an alert email.

% Send ThingSpeak Alert
alertURL = "https://api.thingspeak.com/alerts/send";
apiKey = '***INSERT_YOUR_ALERT_API_KEY***';
options = weboptions("HeaderFields", ["ThingSpeak-Alerts-API-Key", apiKey]);
alertBody = sprintf("Testing ThingSpeak Alert.");
alertSubject = sprintf("Alerts are working");
webwrite(alertURL, "body", alertBody, "subject", alertSubject, options);

Can you modify and confirm it works for you?