Christopher Stapels

MathWorks

Last seen: 3 days ago | Active since 2016

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Answered
How to insert a .m file from matlab into ThinkSpeak matlab?
You can run a MATLAB file that does not produce a visual output in the MATLAB analysis app. For visualization outputs, use the ...

10 days ago | 1

Answered
Daily sum in bar chart is wrong
I tried this in one of my channels and it seems to work fine. I wonder if there is something different about your data. Can yo...

18 days ago | 0

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Answered
New User Thingspeak data
Can either of you share your channel ID if they are public? Then we can have a look at the data you are sending and see what is...

19 days ago | 0

Answered
Bar Graph legend & x axis
This looks like an interesteing application. Can you tell us more about what you are monitoring?

26 days ago | 0

Answered
Getting -401 error code when using WritingMulitpleFields
There are two calls to writefields in your code, I don't see a delay between them. I see a delay at the end of 20 seconds. I wo...

3 months ago | 1

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Answered
Raspberry Pi - MQTT Publish & MQTT Subscribe- Updating Multiple Fields In one MQTT publish request and vice versa
Your message needs to be of the form 'field1=value&field2=value2' etc. If you use the update single field topic instead of the ...

3 months ago | 0

Answered
Sometimes not receiving email alerts from Thingspeak
See the limitations section on the send alerts page. The resrictions can be a bit tight especially when you are debugging. If ...

3 months ago | 0

Answered
My public channel signs me out and I have to login every time I view my public channel.
We aplogize for the inconvienience. Please see this post for more information. Public View is no longer public

3 months ago | 0

Channel

Free Write Channel
For demonstrating writing to a channel in presentations

3 months ago

Answered
Sometimes not receiving email alerts from Thingspeak
You can look at your alerts history here, but it does not record failed attempts. I suggest that you can change your MATLAB ode ...

3 months ago | 0

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Answered
how to read channel status using thingSpeakRead in Matlab?
Our up time is really high, there is no reason the channel should be unavailable. Can you show the format of the command you ar...

3 months ago | 0

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Answered
Login is required for public chanals
Please have a look at this discussion.

3 months ago | 0

Answered
Unable to upload a csv file
Duplicate values are not allowed in the channel. It is possibe that you had already written that data and tried a second time. ...

3 months ago | 0

Answered
Thingspeak Talkback Idempotency issue
One possible solution, though possibly expensive in terms of bytes would be to read the command - instead of executing. Then wh...

4 months ago | 0

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Answered
gauge Apps Plugins not working
This is a known issue, and we have a fix planned for later today. Thank you for letting us know.

4 months ago | 0

Answered
Screen alternating between "Login Successful" then "Authenticating" then back to "Signed in successfully" etc
Thanks for letting us know. You can clear all cache or clear the cookies associated with ThingSpeak and MathWorks in your browse...

4 months ago | 0

Answered
"Error -303"
-303 is unable to parse resonse, which you can see in the library github. 8000 records seems like a lot of data for a device to...

4 months ago | 0

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Answered
Bug in API response, Reading multiple Fields with ESP8266 Arduino Library.
I think you are comparing two different operations as well. The first is a read of the latest feed entry, or all of the field v...

4 months ago | 1

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Channel

AirQ NDIR

4 months ago

Answered
ThingSpeak data tips Matlab Visualization Plot
Some of the features of ThingSpeak field plots are not available on custom visualizations. Interactive plots from custom visua...

4 months ago | 1

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Answered
Newbie Help For PIC and ESP8266 Connection To Thingspeak
Welcome to ThingSpeak. Sorry about the trouble. Use the ThingSpeak library. We make sure its the easiest way. Look in the exa...

4 months ago | 1

Answered
Postman Thingspeak Error 400 & Thinkspeak not updating the data
The bulk write API can be kind of tricky when it comes to syntax. Follow the bulk write doc suggestions closely. There is a P...

4 months ago | 1

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Answered
Not getting reading multiple senaors data from thingspeak
I'd start by trying to write one data from the ESP. Just hard code something and make sure it writes to ThingSpeak. Take all th...

4 months ago | 0

Answered
can not upload data to thingspeak even while the data is displaying in serial moniter
What are you seeing on the serial monitor? I think the problem is that you are stopping the client before the server acknowlege...

5 months ago | 0

Answered
Write to Thingspeak Error in Matlab - URL is incorrectly formed
The most likely reason is that the timestamps already exist in your channel. You cannot write data with a timestamp that alread...

5 months ago | 0

Answered
ThingSpeak Communication Library for Arduino with ESP8266
Those pins would be defined by your board properties, not by the ThingSpeak library. It seems that the standard is GPIO1 (TX) a...

5 months ago | 0

Answered
Can I list more than 10 private channels?
We are addressing the problem and will release a fix in a future release. As a temporary workaround, add '&per_page=100' to the...

5 months ago | 1

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Channel

Community currently online visitors

5 months ago

Answered
Controlling an LED with the Pi 4 using ThingSpeak MQTT subscribe.
I havent looked at the python doc for subscribe. Where do you set the client ID? If this is it, you will want to use a differe...

5 months ago | 0

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Answered
Controlling an LED with the Pi 4 using ThingSpeak MQTT subscribe.
I would look at the MQTT troubleshooting page for subscribe. It is possible that you have settings in your client that the Thin...

5 months ago | 0