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MathWorks

Last seen: en dag ago Active since 2011

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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...

9 dagar 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" ...

11 dagar ago | 0

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

13 dagar 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...

17 dagar 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...

28 dagar 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...

ungefär en månad 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...

ungefär en månad ago | 0

| accepted

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...

ungefär en månad 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 ...

ungefär 2 månader 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...

ungefär 2 månader ago | 0

Answered
writing to multiple fields of
Try and log the values to the serial monitor. Do you see different values for each sensor? Also, maybe your code needs to be li...

ungefär 2 månader ago | 1

| accepted

Answered
MQTT subscribe retrieves no data back after immediate reply
I just tested the workflow with MQTT.fx and it works fine. Some points to remember: 1) When setting up the connection, set the ...

ungefär 2 månader ago | 0

Answered
ESP8266 - Write Single Field
You don't have the ThingSpeak library in your list of project dependencies in your PlatformIO.ini file. You need to add the Thin...

ungefär 2 månader ago | 0

Answered
GSM sends data but cant see them on my channel.
There are no known issues on the server end. You might want to check the connectivity on your end.

2 månader ago | 0

| accepted

Answered
Apps React ThingSpeak IoT says it has been triggered but my Matlab script does not generate an Alert email
Most likely your MATLAB code is triggering the Alert API too frequently and is getting a HTTP 429 code. Take a look at the docum...

2 månader ago | 0

Answered
Getting -401 error code when using WritingMulitpleFields
What is most likely happening is you are making requests to the server far exceeding your allowed data rate. One out of every 15...

2 månader ago | 0

Answered
ThingSpeak graphs and thingSpeakRead stopped working at 20:08 BST
There are no known issues at this time. Channels are updating correctly. See for example: <https://thingspeak.com/channels/9> ...

2 månader ago | 1

Answered
Only field1 is updating
What is likely happening is that the fields are being updated inidvidually, and faster than once per 15s. What you really want t...

3 månader ago | 0

| accepted

Answered
pulse rate enable interrupt caused esp timeout
First, unless you have a paid ThingSpeak license, trying to update your channel every 5 seconds is a waste of resources. In fact...

3 månader ago | 0

Answered
Thingspeak.com yelling "getJSON request failed!"
The underlying issue has been fixed. A missing response header from the server caused your browser to not make any XHR requests....

3 månader ago | 0

| accepted

Answered
Can I track how often and who have viewed the shared channel of mine for a day or a month if I shared my private channels with others on ThingSpeak or ThingView?
There are ways to do this -- specifically, you can set up a MATLAB visualization on the channel that when loaded increments a fi...

3 månader ago | 2

| accepted

Answered
Bug in API response, Reading multiple Fields with ESP8266 Arduino Library.
I think looking at the response at one point in time is probably leading you to incorrect conclusions because the channel was up...

3 månader ago | 0

Answered
how can i solve this error appears when I try reading position
Your channel is empty, and you are trying to index into an empty array retrieved from the channel. Try this: data = thingSpeakR...

4 månader ago | 0

Answered
Connect to Sonoff bridge and temperature sensor
This blog entry has good instructions.

4 månader ago | 0

| accepted

Answered
Sensor data doesn't gets uploaded to thingspeak channel but it show on the serial monitor
If you have not purchased a ThingSpeak license, your maximum update rate is once every 15 seconds. I do not see where you are li...

4 månader ago | 0

Answered
value not getting uploaded
What troubleshooting have you done? Maybe you are updating your channel faster than once every 15 seconds? Share a link to yo...

4 månader ago | 0

Answered
Sending YF-S201 Flow meter data to ThingSpeak cloud
I take it you are using a free ThingSpeak account. This requires you to update the channel less frequently than once every 15s. ...

4 månader ago | 0

Answered
Time one hour less
What is the time zone of your account? You can log in to ThingSpeak and go to the 'My Profile' and see it.

4 månader ago | 0

| accepted

Answered
Gauge widget refresh phenomenon
I suspect this is on account of a slow internet connection. The gauge needs to make a request back to the server to update its v...

5 månader ago | 0

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