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My domain is blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
On further investigation, it appears that there is a difference between your AJAX code and the CURL command: AJAX request is: ...

más de 6 años hace | 0

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Thingspeak Expiration Date? License Type: Free
I believe <https://thingspeak.com/pages/license_faq the FAQ> answers all your questions. For personal, non commercial projects o...

más de 6 años hace | 1

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Thingspeak, change data?
If you want to change the data in a channel, you can clear the channel and re-upload the data. 1) Log in to ThingSpeak and go ...

más de 6 años hace | 0

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Can't send data to thingspeak api using GET HTTP
Have you tried using the ThingSpeak library: https://github.com/mathworks/thingspeak-arduino I'd recommend starting with those ...

más de 6 años hace | 0

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Can't upload - free license expired
Can you confirm your account is reactivated?

más de 6 años hace | 0

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Incorrect ThingSpeak update feed error "error_payment_required" status 402 returned
I believe your license was inactivated on account of not linking your legacy ThingSpeak account to a MathWorks account. If you l...

más de 6 años hace | 0

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Readmatrix / readtable works on ThingsSpeak ?
If you have access to desktop MATLAB or MATLAB online, you can load the contents of the CSV file in MATLAB and use thingSpeakWri...

más de 6 años hace | 0

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ThingSpeak http error code 0 but data is inserted
The most likely situation is that your device is doing multiple updates within the allowed update rate (every 15s as a free user...

más de 6 años hace | 0

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Simple Problem with Pie Chart on Thingspeak using MATLAB Visualization
Does your data have NaN's in the field? You can find this out by exporting the channel data from the 'Data Import/Export' tab of...

más de 6 años hace | 0

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ThingSpeak: missing IPv6 compatibility
It sounds like you're using a ststic IP address in your nodes. Static IP is not recommended for a number of reasons. Would it no...

más de 6 años hace | 0

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update lat, long. Just in order to plot those in a Google Map.
You can update the lat and long fields of the channel. In addition to the 8 fields, there are separate lat, long and elevation f...

más de 6 años hace | 0

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I would like an example of scpi over ethernet to Rigol Instruments using the instrument control toolbox.
I've not tested this as I don't have a Rigol scope, but you should be able to start from here: % Initialize scope. The port num...

más de 6 años hace | 2

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how to handle multiple device ?
Can you describe in more detail your project? How many nodeMCUs do you have? How many sensors per device? What are you doing wit...

más de 6 años hace | 0

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how we store video frames in firebase from matlab?
You might find this documentation helpful: https://www.mathworks.com/help/matlab/import_export/work-with-remote-data.html

más de 6 años hace | 0

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can we store the image from matab to thingspeak?
You might find this documentation page helpful. https://www.mathworks.com/help/matlab/import_export/work-with-remote-data.html...

más de 6 años hace | 0

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3rd Party Cookies
Have you disabled cookies in your browser, specifically, 3rd party cookies? Here are instructions on enabling them: https://di...

más de 6 años hace | 0

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Sending PuTTY-like command through TCPIP or VISA
If you can PuTTY into the box, then it is likely running an SSH server. Try using this: https://www.mathworks.com/matlabcentra...

más de 6 años hace | 0

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Thingspeak - Expired License message & upload stopped working
Your request to re-activate your account has been addressed. Please log in to ThingSpeak and confirm you are able to send data t...

más de 6 años hace | 0

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You have run out of messages
Can you please log in to ThingSpeak and check your account again?

más de 6 años hace | 0

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ThingSpeakWrite() limit only 33% more in Home version than free, should that be?
There are multiple levels of counters on https://thingspeak.com/account. The table shows the number of messages remaining and is...

más de 6 años hace | 1

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wrong time in my thingspeak chart
If you have browser extensions/plugins that are changing your browser's timezone, then you will see this issue. Try logging in...

más de 6 años hace | 0

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How do I write to a ThingSpeak channel from a Raspberry pi via code deployed using the Matlab Coder?
As you said, there is a block in the Raspberry Pi Support Package that you can use. https://www.mathworks.com/help/supportpkg/...

más de 6 años hace | 0

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Plot won't show line
My guess is that your data has a bunch of NaN's in it which is causing the issue. Look at the documentation of the rmmissing a...

más de 6 años hace | 0

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Trying to compile ThingSpeak Toolbox Support into a standalone App. How to add P file requirements manually.
If you are using R2019a (or newer) of MATLAB, you do not need to install the ThingSpeak Support Toolbox -- the functions are bui...

más de 6 años hace | 0

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How can ı use talkback on thingspeak with simulink?
There are specific blocks in Simulink to send data to ThingSpeak or read data from ThingSpeak. See: https://www.mathworks.com...

más de 6 años hace | 0

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Multiple Values in one Field
You can pack more data into a field, but, you will have to use your own algorithm in MATLAB to unpack the data and update MATLAB...

más de 6 años hace | 0

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Tweeting frequency with React App
Twitter rate limits how often the exact same tweet can be tweeted from an account. You will likely want to make your tweets uniq...

más de 6 años hace | 0

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Use MATLAB on local ThingSpeak server
Hi James, At this time the GitHub version of ThingSpeak contains the data collection engine and some charting. If you are loo...

casi 7 años hace | 1

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How can i put the generated Sensor Data from my Android Matlab App to thingspeak?
From the MATLAB app, you can use the thingSpeakWrite function to write data to ThingSpeak. Note that the time resolution of data...

casi 7 años hace | 0

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No Lines between points when plotting on ThingSpeak (Example ThingSpeak Code)
It is very likely that your data has NaN's in them. You can remove the missing entries using the RMMISSING function before plott...

casi 7 años hace | 1

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