Resultados de

I find this is possible to do, but how does one read the data back.

Buena tarde, he estado tratando de cambiar toda la configuración, con distintos correos para ver si me lanzaba el aviso de fuera de rango de temperatura, pero no he podido lograrlo. También baje una app Ilo thingspeak, para celular, pero tampoco me activa las alarmas. les agradecería su ayuda. gracias. Mensajes a correo,willfree66@outlook.com

Im not able to upload a csv file which I have created using rpi. The csv file is as follows

datetime field1 field2 field3 2021-04-19-10:59:46 0 0 0 2021-04-19-10:59:47 122 -1 265 2021-04-19-10:59:48 123 -1 265 2021-04-19-10:59:49 115 0 266 2021-04-19-10:59:50 122 -7 265 2021-04-19-10:59:51 117 -5 265 the error I get is invalid csv file or contains duplicate timestamp or missing timestamps. If someone could point out the mistake, it would be helpful.

I am having issues with my two channels

https://thingspeak.com/channels/513058

https://thingspeak.com/channels/971602

when I try to view them without being logged in. The channels are public (and have always been that way). I have those links on my desktop and also have them as favourites in my browser. Using any of these will ead to the following behavior

1. The public view of the channels starts to load
2. Widgeds etc start to be filled (see attached file Scrennhunter_309.png)
3. The display view closes after a few seconds and shows the Mathwork/Thingspeak sign on screen with a message box saying "Signed out successfully" (see attached file ScreenHunter_310.png)

In order to circumvent the issue, I have

• deleted the cache
• deleted all mathwork cookies
• deleted all thingspeak cookies

The issue prevails. I have then

• deleted the cache
• deleted all cookies

The issue prevails.

I tried

• Firefox browser Version 78.9.0esr (32-Bit)
• Internet explorer, newest Version
• Microsoft Edge, newest Version

The issue prevails

I tried 3 different PCs, each running Windows 10 pro 20H2 (build 19042.928) with all current updates installed

The issue prevails

I tried my Safari browser on my ipad Pro - no issue there!!, neither on my iPhone.

What am I missing? What can/shoud I do?

With best regards vom Germany

Volker Bandke

Everytime I try to log onto my thingspeak the webpage keeps refreshing. Have to stop loading page and every page I go to keeps refreshing.

Hi,

 Recently, I'm trying to view any Public channel (including my public channel). It opens the channel a second and redirects to the login page. Is there any way to see a public channel without login?

S.

I'm testing use of a 3g dongle which is pay as go (in the UK). I'm sending messages to Thingspeak (via Python on Pi) but the credit allowance decrease indicates several megabytes have been used. Even if one message is 1,000 bytes then after 1,000 messages like this I'd expect to lose 1 megabyte of credit but instead it's 10 MB (I'm sending https://api.thingspeak.com/update?api_key=xxxxxxxxxxxxx&field3=12345 ) Has anyone experience of data logging over a mobile data dongle and how much it should cost ?

HI! The following line works well to send my var1 value to thingspeak.

GET https://api.thingspeak.com/update?api_key=****************&field1={var1}

But I would like to send the addition of var1+var2 in the same command. I tried many differents commands like:

    GET https://api.thingspeak.com/update?api_key=****************&field1={var1+var2}

any help? Thanks

We will be hosting a seminar on MATLAB Grader, the product I manage at MathWorks, on April 21st at 7am EDT. If you are interested in adding autograding capabilities for #MATLAB to your course, MOOC, textbook, or learning environment and have questions, please join this seminar and take part in the live Q&A with the product team the following week. #autograding #assessments #onlineassessment #onlineteaching

MathWorks Seminar: Autograded Assessments with MATLAB Grader & LMS Integration

Javascript based plugins no longer working properly (in private views). Its just not displayed in channels. (Shown as field Sections are empty)

I can no longer open and view my Thingspeak results in Firefox. It gets stuck in a loop which alternates between telling me I've logged in and authenticating. I've tried clearing Thingspeak cookies and rebooting the PC.

The same page works in Chrome, but I prefer to use Firefox as my browser. Any ideas what is wrong ?

Hello

From earlier today a project i've been working on has stopped working. It was working for the last couple of weeks with no coding updates in the mean time.

The error i'm only now getting is

"from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource."

Im transferring four readings from thingspeak to a web page

the get command i'm using is. xhttp.open("GET", "https://api.thingspeak.com/channels/752230/feeds/last", false); xhttp.send();

Why would i only start receiving this error today. If more information is needed i will send it on.

any insights would be much appreciated.

Thanks

Trev

Hello, since today 14:00 CEST (UTC+2) (= 12:00 UTC = 4 hours ago) none of my thinkspeak clients running on Arduinos using PubSubClient are able to connect to mqtt.thingspeak.com. Until then, they have been running happily for months.

I tried to send some data manually but didn't succeed:

mosquitto_pub -d -h mqtt.thingspeak.com -u TESTTerrasseWemos -p 1883 -P xxxx -t "channels/cccc/publish/yyyy" -m "field1=10&field2=60" ; echo $?
Client mosq-xxxxxxx sending CONNECT
Error: Unknown error.
19

The exact errors differ from try to try. But I don't know if my call is definitely correct.

Any help or information what might have changed at mqtt.thingspeak.com?

Thank you very much.

hi everyone could you explain to me why the three phase voltages in this video are not sinusoïdale and how to change them To be sinusoidale?

Youtube video: Motor Control Design with MATLAB and Simulink

link:https://www.youtube.com/watchv=lP4jbmthiyc&t=1103s&ab_channel=MATLAB

Hi. Im using sim800 for sending data to thingspeak channels when connecting to api.thingspeak.com with port 80 everything is ok. But after sending" update?api_key=YYP2Q3T8UZ2WBP6H&field1=0 " by sim800 it closes the connection and 400 Bad Request error appears on the debug session. I tried this with hercules serial terminaal and same results .

Hello

I am currently having a hard time to install thingspeak server standalone on Debian 10 (Buster). I used the following docs: https://www.teracomsystems.com/blog/how-to-install-local-thingspeak-server/ https://angryelectron.com/how-to-install-a-thingspeak-server/

It breaks on "bundle install" with wrong gem dependencies, several tries to resolve the dependencies didn't work.

Anyone had luck installing thingspeak latest on Debian 10? Is there an installation documentation for thingspeak on Buster?

Thank you, Thomas

Hi - I'm currently using the code from this article: https://uk.mathworks.com/help/thingspeak/continuously-collect-data-and-bulk-update-a-thingspeak-channel-using-an-arduino-mkr1000-board-or-an-esp8266-board.html

My plan was to use this so as to update my Thingspeak server every second with data recorded on my arduino of higher than 1Hz. I am currently taking vibration sensor data that for my project requires a higher sample rate than Thingspeak is able to handle naturally - thus I found bulk updates to be the solution.

I have gotten this to work as specified in the article - updates every 2 minutes with data points at every 15 seconds. I have gotten this as far as data points every second with an update to the server every 10 second - however the system fails at any data point shorter than a second. I believe this to be a problem with using delta_t but I am not sure.

To clarify I do not have a computer science background, this is currently a project I'm working on in Mechanical engineering and I've truly hit a wall with this problem. Any help would be appreciated!

My system is an Arduino MEGA 2560 with an ethernet shield - in the sample code they use RSSI to output sample data, I simply changed this to a random number between 0-50.

I have a channel in thing speak with 1 field but the field visualization shows the date is yet to come "2022 </matlabcentral/discussions/uploaded_files/4532/data>

I am new to the subject but I want to learn, I wanted to know how I use my esp32 to activate a relay (to connect devices and or lamps) from a distance with my cell phone. what do I have to use for this or what procedures should I follow, thank you

how can we modify the parameters to have a value with one decimal after the comma ?

thank you in advance,