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MathWorks

Last seen: 1 day ago |  Active since 2011

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Test Micro:bit

23 days ago

Answered
How to fetch and visualise live data from thingspeak fields in Matlab app designer
My recommendation is: 1) Build your app with MATLAB App Designer with the gauges and lamp indicators. 2) On ThingSpeak set up...

25 days ago | 1

| accepted

Answered
Issue with TimeControls getting stuck
We'll take a look on the back end why these Time Control got stuck. Typically when I have seen this, it is because something has...

1 month ago | 0

Answered
Thingspeak now unable to parse website
I can't access the URL from the public internet in the US. I believe this to be the reason the ThingSpeak servers can't get to t...

2 months ago | 0

Answered
error while using Things Speak with Cube MX
If you want to use the ThingSpeak library from your STM Nucleo board, I believe you will need to get these files in your compile...

3 months ago | 0

Answered
MATLAB ANALYSIS run Successfully on ThingSpeak, BUT always generates Server Error 500, so doesn't send email
Here's the code I used to test an alert email. % Send ThingSpeak Alert alertURL = "https://api.thingspeak.com/alerts/send"; ...

3 months ago | 0

Answered
Thingspeak - no reading data error code 0
I believe the key is here "...updating the library with WifiS3.h rather than Wifi.h." My guess is the WiFiS3 library is not exac...

3 months ago | 1

Answered
Not receiving data from mqtt broker in a public channel
My guess is the public channel has not seen an update since your client connected to it. I just created a public channel (266275...

3 months ago | 0

Channel


Test MQTT subscribe
This is a public channel that gets an update with a random value [0-10] in Field1 at least every 10 minutes. You can subscribe t...

3 months ago

Answered
thingspeak server closing connection immediately
Are you able to publish/subscribe to the channel updates from a different client such as MQTTX ? If that works, I would suggest ...

4 months ago | 0

Answered
Problem connecting reliably to Thingspeak over Ethernet
As you say, a 301/302 from the ThingSpeak library suggests network connectivity issues. Try using a different WiFi network to se...

5 months ago | 0

Answered
can I use custom libraries (dlls) written for matlab with Thingspeak
If you have the DLLs and MATLAB code calling those DLLs in a git repo, you could have your MATLAB Analysis on ThingSpeak clone t...

5 months ago | 1

| accepted

Answered
Read and Write in one scatch
Yes. You can combine the examples of reading and writing to have a sketch that reads data from one channel and writes to another...

6 months ago | 0

Answered
why my esp8266 push data to ThingSpeak will always hit -301 response code
As Christopher says, a 301 typically means your device does not have Internet connectivity.

6 months ago | 0

Answered
Message usage reset anniversary date?
It is the anniversary date of you signing up to ThingSpeak. So, if you first created your account on Jul 10,2023, for example, y...

6 months ago | 1

| accepted

Answered
I am unable to connect MQTT client using Thingspeak in MATLAB.
I believe you are using an older version of MATLAB. You need to use MATLAB R2022a or newer and have a license to the Industrial ...

2 years ago | 0

| accepted

Answered
How to download the root certificate from thingspeak.com? I am unable to locate the root certificate that is required to set up the thingspeak broker.
Here are instructions on how you can download the certificate for any website. For ThingSpeak MQTT broker, you can download the ...

2 years ago | 3

| accepted

Answered
Cant view my data on thingspeak app
I recommend starting with the example here as a starting point for your code. The ThingSpeak library on Github is to help users ...

2 years ago | 0

Answered
Connection between Codesys and Thingspeak
From our server logs it looks like the publish and subscribe topics are invalid. Codesys seems to convert the "/" character in t...

2 years ago | 0

Answered
want to download files from dropbox to a local computer using websave
The MATLAB function on FileExchange is a pure MATLAB solution and does not require you to write Dropbox apps. Please install the...

2 years ago | 0

Answered
How much data it can store for how long
Please take a look at the ThingSpeak license FAQ that answers your questions.

2 years ago | 0

Answered
I want to know MQTT API Key
Please read the <https://www.mathworks.com/help/thingspeak/channels-and-charts-api.html documentation> and examples on how to us...

2 years ago | 0

Answered
Thingspeak 301 Error with NodeMCU (ESP8266) [writing to multiple channels]
I believe this is because of DNS caching somewhere on your end. See this thread for information. Also see this thread, which get...

2 years ago | 0

| accepted

Answered
I want to send data to Thingspeak using proteus 8 professional
I think that is a great question for the makers of Proteus 8!

2 years ago | 1

Answered
I want to send data to ThingSpeak using Arduino
The question title says "I want to send data to ThingSpeak using Arduino", which is answered by the answer here. If you are int...

2 years ago | 1

Answered
why do I get the error "Problem updating channel. HTTP error code -301" when connecting the esp board and trying to transfer the data to thingspeak
Have you tried a different network than your phone's wifi hotspot? Do you still get 301 status code on that?

2 years ago | 0

| accepted

Answered
Can not connect to ThingSpeak MQTT broker using MQTT X Client
If you're connecting over Secure MQTT, you need to use port 8883, not port 1883 as your screenshot shows.

2 years ago | 0

| accepted

Answered
can I send the things speak data to a wordpress website?
You can host the ThingSpeak chart inside of your wordpress site. See this blog entry. There are 3rd party plugins also available...

3 years ago | 1

Answered
MQTT X and thingspeak - lost connection
Here's the settings you need to connect with MQTTX:

3 years ago | 0

Answered
Migrating my existing ThingSpeak channel to new MQTT server
If you have 2 devices publishing to the same channel, one with the legacy mqtt connection and another with mqtt3 connection, but...

3 years ago | 0

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