Christopher Stapels

MathWorks

Last seen: 2 days ago | Active since 2016

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How to fetch and visualise live data from thingspeak fields in Matlab app designer
This is a terrific application. App designer can really give customizable control the main web UI cant offer. I wrote this fil...

2 months ago | 2

Answered
Cannot display the map and mapdata correctly
Locations are not automatically filled in. If your device writes data to the fields Latitude and Longitude then they will exist ...

2 months ago | 1

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How can I make simulink model of Integrated control and monitoring system with digital electronic board, sensor and wireless sensor to send data to thingspeak ?
We have a great support package for Arduino, which will allow ou to use the ThinkSpeakRead block in your model and deploy to the...

5 months ago | 0

Answered
How to access files on Matlab Drive from Thingspeak Analysis App
Unfortunately at present you cannot access MATLAB drive content via ThingSpeak analysis or visualizations. I will add your requ...

5 months ago | 0

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Historial en los charts
It is not clear what app you are using to view your ThingSpeak data, but I do not think the app you show it is specifically supp...

5 months ago | 0

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thingspeak server closing connection immediately
Usually that means an authentication issue. Can you ensure the device is set up correctly and it is allowed to publish to the c...

6 months ago | 0

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Confusion using thingsspeak in MATLAB(How to turn on relevant lamps depending on signal recieved from thingsspeak)
Have a look at this video series, especially in the fourth video, where we talk about remotely controlling objects. https://mat...

7 months ago | 1

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data stops after 6-7 transmissions
I recomend using the ThingSpeak library - it takes care of much of the network connectivity for you. Are you sure its not one o...

7 months ago | 1

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Can't send data from ChirpStack to TS
You don't seem to have included any data, at least in what you have shown above. If you are including data and you see the numb...

8 months ago | 0

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401 error code when trying to bulk-write to Thingspeak using AT-COMMAND
The bulk endpoint requires a somewhat complex syntax. Check out the bulk JSON update page here. You aren't providing all the c...

8 months ago | 0

Answered
Error sending data to ThingSpeak - Data Intervals??
Generally I'd look at the code. ThingSpeak will only reject your data if you send it too fast or format it wrong, but it seems ...

8 months ago | 0

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How do I display all the data, not just the last 30 minutes or so
You can use the pencil icon in the upper right of the standard field plots on your ThingSpeak channel to show more data, assumin...

9 months ago | 1

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Answered
The write channel is same as read channel data. Why the data is not processed?
a = 1:5 for i = 1: length(a) out = i * a(i) end If you read more then one value from your channel at a time, then length...

9 months ago | 0

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Buenas noches, tengo error -301
The 301 error means the library is not able to find a connection that works. Either your conenction parameters are incorrect, or...

9 months ago | 0

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Thingspeak HTTP eror code: -210
You can send data to multiple fields in a single post by adding &fieldx=number to the end of the api call or the mqtt payload. ...

9 months ago | 1

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No longer seeing data from sim800l and pic18f4525
No change in the API. My guess is connectivity. Try moving the device to a new location.

9 months ago | 0

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MATLAB code has not completed execution within the allocated time. Consider optimizing your MATLAB code to execute within the available time limit.
I suggest using thingSpeakRead and the Alerts service. Your code will preform much faster and you wont have these errors.

9 months ago | 1

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Answered
The write channel is same as read channel data. Why the data is not processed?
length(values1) is 1 so i is 1, and Y1(i) = i * values1(i); just multiplies your value by 1. Perhaps you want to read more tha...

9 months ago | 1

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Answered
Not connecting to thingspeak
Start with the getting started tutorial. Then make sure you can update your channel via the browser. Then try to update a st...

10 months ago | 0

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Public views requires login
Thanks for reporting this issue. We have a fix in progress, but in the meantime please try the following workaround: Go to the...

10 months ago | 1

Answered
Send more than one value in Field 1. Buffer of values.
We definitely need to change he way you are sending data to ThingSpeak. (I would clear the data and start over) Do you intend t...

10 months ago | 0

Answered
Wo kann ich die kostenlose Lizenz erwerben?
You do not need to purchase anything to use the free version of ThingSpeak. If you are intending to use it for commercial purpos...

10 months ago | 1

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Send more than one value in Field 1. Buffer of values.
ThingSpeak cannot parse the data you have in your field since it has string characters in it. MATLAB can though. First you nee...

10 months ago | 0

Answered
GAUGE DOES NOT WORK CORRECTLY
Please follow this post.

10 months ago | 0

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Sending a danger message on email or phone Number.
Sure, there are several ways to do that using ThingSpeak. The best way is using the alerts API. Jsut set up the alert in Thing...

11 months ago | 0

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Sometimes updates temp others humidity
Yes you can send in one command. See the library examples on write multiple fields. Your code is violating the 15 second rule be...

11 months ago | 0

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How to use Fronius HTTP Post push service to send data to thingspeak
A quick web search does not show great documentation for Fronius push service, but I did find some things. I would use http. U...

11 months ago | 0

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Answered
I want to send my ultrasonic sensor data on thing speak through arduino programming using esp32 microcontroller . but it is not sending the data on thingspeak.
Please try writing using the browser once so there is at least some data in your channel. See the api keys tab of your channel ...

11 months ago | 0

Answered
Im not able to csv file into the cloud.Each time I get a timestamp error. I have tried all the format thats given on the site. But each time I get "no rows imported"
Your file has a bunch of extra commas at the end, ThingSpeak is seeing these as several entries with the same timestamp. Remov...

11 months ago | 0

Answered
pack more information into a single field
Fo the concepts, I really reccomend some time with the documentation. I would suggest you use multiple channels, this will ma...

12 months ago | 0

Christopher Stapels

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