Thingspeak Error Message on one of my MATLAB analyses

Hello. I am doing a Thingspeak project and I am having this issue that is printed out on only one of my MATLAB analyses which is:

Error using matlab.internal.webservices.HTTPConnector/copyContentToByteArray (line 396)

The server returned the status 429 with message "Too Many Requests" in response to the request to URL

Error in readContentFromWebService (line 46)

byteArray = copyContentToByteArray(connection);

Error in webwrite (line 139)

[varargout{1:nargout}] = readContentFromWebService(connection, options);

Error in High humidity (line 8)

result = webwrite(alert_url, jsonmessage, options);

Can I know what this issue means? The rest of my analyses do not have an issue -- only one of them does.

[Walter Roberson]

The server is busy. Possibly it was busy with other people and you should try again. possibly you were making requests faster than it wanted to talk to you and you should put in pauses.

[Sendhoran Manokaran]

It also says that the react wont work cause of the error in the Analysis

[Walter Roberson]

That makes sense when it is not able to contact the server because the server is busy.

[Sendhoran Manokaran]

so this issue applies to even private channels? because my channel is private and it says that react will stop after few more attempts

[Walter Roberson]

you mention private channels. Are you using thingspeak? I do not know very much about thingspeak

[Sendhoran Manokaran]

Yup i am using Thingspeak

Answer 1

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/493714-error-429-too-many-requests

You are making your thingspeak requests too quickly. Bulk requests should not be any less than 15 seconds apart, and if your bulk request is large then you might have to wait extra time.

[Christopher Stapels]

Bulk Write JSON Data see the Limitations section at the bottom.

Also Error Codes.

The reacts are set to stop triggering erroed code after a few tries to prevent wasteful MATLAB calls.

Answer 2

[Nazmi Rosly]

Hi. Im trying to send data from matlab which is the data from serial monitor from arduino. It is fine until 9th of data and then it stopped and says :

Error using Untitled (line 27)

'Values' must have a maximum of 9 elements, including the timestamp.

My coding is:

clear all

s = serial('com4');

fopen(s);

i = 1;

while(1)

data(i)= str2double(fscanf(s));

plot(data);

title('Temperature Monitoring')

xlabel('Time')

ylabel('Temperature')

pause(15);

i=i+1;

%thingSpeakWrite(1463959,data,'WriteKey','9OUSQA9OXZU0EO4X')

% Generate timestamps for the data

%tStamps = datetime('now')-minutes(9):minutes(1):datetime('now');

channelID = 1463959; % Change to your Channel ID

writeKey = '9OUSQA9OXZU0EO4X'; % Change to your Write API Key

% Write 10 values to each field of your channel along with timestamps

tStamp = datetime('now')

thingSpeakWrite(1463959,data,'WriteKey','9OUSQA9OXZU0EO4X','TimeStamp',tStamp)

end

[Christopher Stapels]

Can you start a new post instead of adding onto this one? Its definitely a different issue.