Christopher Stapels

MathWorks

Last seen: 3 dagar ago | Active since 2016

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The twelve days of Christmas
Traditionally there are twelve days of Christmas to celebrate ("Twelvetide"), typically starting with Christmas Day (25 December...

4 dagar ago

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

16 dagar 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 ...

18 dagar 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...

3 månader 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...

3 månader 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...

4 månader 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...

4 månader 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...

5 månader ago | 1

Answered
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...

5 månader ago | 1

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String Logic 19
Examples: 'DIG' --> 'I' 'IMPORTANT' --> 'MOTN' 'DEAL' --> 'EL' 'LIMB' --> 'IB' 'MOSTLY' --> 'OTY'

6 månader ago

Solved

Binary numbers
Given a positive, scalar integer n, create a (2^n)-by-n double-precision matrix containing the binary numbers from 0 through 2^n...

6 månader ago

Solved

Find out sum and carry of Binary adder
Find out sum and carry of a binary adder if previous carry is given with two bits (x and y) for addition. Examples Previo...

6 månader ago

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Convert given decimal number to binary number.
Convert given decimal number to binary number. Example x=10, then answer must be 1010.

6 månader ago

Solved

Create a cell array out of a struct
Create a cell array out of a (single) struct with the fieldname in the first column and the value in the second column: in: ...

6 månader ago

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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...

6 månader ago | 0

Answered
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...

6 månader ago | 0

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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 ...

6 månader 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...

7 månader ago | 1

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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...

7 månader 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...

7 månader 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. ...

7 månader 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.

7 månader 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.

8 månader ago | 1

| accepted

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...

8 månader ago | 1

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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...

8 månader ago | 0

Answered
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...

8 månader ago | 1

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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...

8 månader ago | 0

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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...

8 månader ago | 1

Answered
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...

8 månader ago | 0

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GAUGE DOES NOT WORK CORRECTLY
Please follow this post.

8 månader ago | 0

Christopher Stapels

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