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MathWorks

Last seen: Today Active since 2011

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Answered
Values are getting updated every 15 seconds in thingspeak. How do I lower this time?
Also note that if your license allows you to update a channel once every 15s and you are knowingly wasting resources by having a...

4 days ago | 0

Answered
Why I don't get thingspeak update from both DHT11 with 4 field
What have you tried to debug the issue? Have you tried printing the measured readings to your serial port before updating your t...

9 days ago | 0

Answered
is there a data upload limit on thinkspeak? for example temperature data uploaded in real time
Your question is similar to this one and the FAQ linked there will answer your questions as well.

11 days ago | 1

Answered
ThingSpeak: How to set 'NumPoints' equal to the maximum available in the channel?
See this documentation. The NumPoints can be at max 8000. If you have less than 8000 points in your channel, everything is retur...

19 days ago | 0

| accepted

Answered
At what point in thingspeak data upload created_at timestamp is added to channel data?
The created_at is set at the time the data is received by the ThingSpeak API server. If you are using MQTT, or static IP - which...

19 days ago | 0

| accepted

Answered
Is there a limit to the amount of data I can collect on Thingspeak?
I believe answer to question #23 on the ThingSpeak license FAQ is what you are looking for.

20 days ago | 2

| accepted

Answered
how can i specify the timezone?
Go to https://thingspeak.com/account/profile and set your timezone. Also, ensure your system time is set to the correct timezone...

25 days ago | 0

Answered
DELAY in state from on- off spontaneously
Are you using a ThingSpeak account with the free tier? If so, a channel can only be updated every 15 seconds or less frequentl...

26 days ago | 0

Answered
What is wrong with this code?
Thingspeak can only accept data sampled at 1hz or lower frequency. That is, tStamps should be at least 1s apart. My initial gues...

30 days ago | 0

Answered
Can I detect when a channel is queried?
ThingSpeak does not currently provide this information. If you are concerned about the access to the channel, make it private. T...

2 months ago | 0

Answered
How to parse JSON with ThingHTTP when field names have spaces? Standard dot notation doesn't with ThingHTTP?
You can parse JSON using the dot notation. Here's an example: Of course, this is a bit contrived to create a thingHTTP to rea...

2 months ago | 0

Answered
ThingHTTP returns -1
It appears that the certificate chain of the website may have an expired or invalid certificate or it is not from a recognized c...

2 months ago | 0

Answered
Why ThingSpeak interface become weird?
It appears that certain users in Malaysia are facing an issue as a CDN provider appears to be blocked. Try using Opera browser ...

2 months ago | 0

Answered
Why ThingSpeak interface become weird?
I am unable to reproduce this. Are you using a VPN to connect to the internet? Can you show a screenshot of all the browser ...

2 months ago | 0

Answered
How to read data from ThingSpeak and control led using sim800L?
Is the SIM card activated? Have you confirmed that you can connect to the internet with the SIM800L module and your SIM card? Do...

3 months ago | 0

Answered
All my channels stopped working
Did you check connectivity from your Arduinos? Perhaps they lost internet connectivity?

3 months ago | 0

Answered
Multiple sensor data not uploading simultaneously on the Thingspeak fields of the same channel
That is likely because you are trying to update the same channel from multiple sensors and running afoul of how frequently a cha...

3 months ago | 0

Answered
Why thingspeak cant receive data from sensor ?
I'd recommend taking a look at the examples in the ThingSpeak library as a starting point for your project.

4 months ago | 0

Answered
Hi I have ThingSpeak paid licences but unfortunately i couldn't get real time updated data
How are you updating the channel (embedded device? browser? Something else?) If it is an embedded device, have you checked if it...

4 months ago | 0

Answered
Android mqtt dash board configuration problem
I use MQTT Dash on Android and was able to configure my device. See attached screenshots of my config. Please read the documenta...

4 months ago | 0

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Answered
Data from Libelium to thingspeak
That sounds like an issue on your Libelium gateway. Your best bet is to reach out to Libelium technical support for assistance a...

5 months ago | 0

Answered
Daily sum in bar chart is wrong
My suspicion is that the field has a bunch of 'NaN's in them. Can you download the data for the channel from th "Import/Export" ...

5 months ago | 0

Answered
"Field value unavailable" message from Thingshow
Did you update the app on your phone to the latest version?

5 months ago | 0

Answered
Javascript to display last value of a ThingSpeak channel on web page | ThingSpeak API
If you click the "bubble" icon on the numeric display widget added to your channel, you will get the HTML code required to embed...

5 months ago | 1

| accepted

Answered
Function 'webread' not supported for code generation Matlab - ThingSpeak - Raspberry Pi
Rather than use webread, why not use <https://www.mathworks.com/help/supportpkg/raspberrypi/ref/publish-and-subscribe-to-message...

5 months ago | 0

Solved


Find state names that start with the letter N
Given a list of US states, remove all the states that start with the letter N. If s1 = 'Alabama Montana Nebraska Vermont Ne...

6 months ago

Answered
Can the 4 free channels each simultaneously upload to Thingspeak once every 15sec
Yes. With a free account you may have up to 4 channels updated at up to once every 15s. Note that each update is considered as o...

6 months ago | 0

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Answered
The response for updating a field can sometimes take up to 12 seconds . Too slow
ThingSpeak has an operational metric to respond to requests to update a channel within a few hundred milleseconds of receiving t...

6 months ago | 1

| accepted

Answered
How can I tweet regularly with ThingSpeak?
Twitter has limits that prevent you from tweeting the same message repeatedly. The key to using ThingTweet is to tweet a unique ...

6 months ago | 0

Answered
Thingspeak with MKR1000 example program from Arduino library 2.0.0 sends http error -301
The fact that it is stable with PC USB and unstable when powered by standalone USB suggests that perhaps the standalone USB is n...

6 months ago | 0

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