結果:
After I give the commands I get a response like this
AT+CIPSTART="TCP","api.thingspeak.com","80" OK
CONNECT OK AT+CIPSEND > GET https://api.thingspeak.com/update?api_key=Q03CA55P7NVGA8S8&field1=23 SEND OK
CLOSED
But the field charts are not updated in the website. And the data widget shows "no data available to show". And the number of entries remains 0. kindly help me out why I didn't get the values.
I have an Esp8266 weather station and I want the graphs in thingspeak to display customary units instead of metric. How do I do it?
Prof. Duarte Antunes from Eindhoven University of Technology explains how he's been using MATLAB live scripts for teaching an online "Optimal Control and Dynamic Programming" course.
Hello,
I would like to share a channel with some users, but when I do it, they can see the channel in "Channels share with me" but when they open the channel the can not see the data inside. There is a message saying: You don't have permission to view that channel! Do you know why is that? Thank you.
Hi there, my PI submitted some (3) wrong values to my channel. I didn't find am opportunity to remove them. Can anoyone help or give me a hint? Those 3 wrong values are killing my statistic and let the chart look very wrog due to those peaks Thanx to you
ok I want to extract all those rows in a table where one column has strings in which it shall contain the word "change" specifically after the word "terms" . text is : May not be redeemed for cash or combined with any other offer or coupon. Not valid on clearance (merchandise ending in .98). May not be applied to taxes, previous purchases, or the purchase of gift cards. Non-transferable. Terms are subject to change at any time. Product styles are subject to availability. See store associate for details.
WiDS Datathon 2021 is going on right now. The focus of the Datathon this year is "on creating models to classify whether patients have been diagnosed with a certain type of diabetes." You can register and participate until March 1.
Also, take a look at this blog post on the MATLAB benchmark code for this datathon.
MATLAB Benchmark Code for WiDS Datathon 2021
There are also various online challenges by MathWorks that students may be interested. Here are the winners from last year's Simulink Student Challenge. There was also a MATLAB Online Live Editor Challenge a couple of years ago.
Hello, I am interested in creating an IoT academic project, but I have encountered two difficulties: 1- It is necessary that in the ThingSpeak interface you can see a live camera. I have not found documentation or any information on how to do it. Yes, I know that you can import data from other websites (copy XPath), but I have not achieved it with traffic cameras from local websites. 2- I also need to act remotely on actuators, is this possible in ThingSpeak?
I would appreciate an honest answer, since in case of not being able to implement these solutions, I will have to find another platform or method to carry out this. Regards!
Hi,
I would like to export data from my channel. My channel receives data every 15 minutes but I would like to export the data similar to what I can see when I change the chart/field's timescale to 60 minutes.
Thanks!
Hello , I wonder how to determine continous or discrete time modelling.For example if I want to run my model in MCU in this case discrete model is suitable?I am a bit confused
Hi everyone,
I have been using Thingspeak for quite some time now for monitoring data for my wife‘s greenhouse. She accesses those data via the public view of the channel. So far, so good.
Now someone has used the „feature“ to add a comment to that view. Nothing serious, but my wife isn‘t happy. Therefore she asked me to remove the comment, and to set things up in such a way that comments can no longer be added.
Thus my two questions: 1. How can I delete the comment? 2. How can I disable comments made by not signed on users?
The channel in question is https://thingspeak.com/channels/971602
With best regards
Volker Bandke
I'm presently working on an Air Quality monitor to be able to check the status of my environment and remote environments on ThingSpeak. I was planning on using the BME680 sensor. Does anyone have any experience with this or other air quality sensors? I'm looking probably for CO2 and the like (Volatile Organics), not so much particle sensors, though a combination may be best.
Hi,
I set at the Chart Options Results on 40320, what should be one week. But the graph shows only 36 hours (and some minutes). I also try to set it results on 7 day, but still I get only 36 hours.
Why it is not showing 7 days graph?
Frank
https://thingspeak.com/channels/1222127
Happy New Year, everyone! We hope you enjoyed the Cody contest in 2020, learned new MATLAB skills, and made a friend or two. While the 2020 contest has concluded, the fun and learning never end.
Please take the 1-minute survey to talk about your experience (only 2 required questions). Our goal is to make future contests better and more appealing to you, so your feedback is critical to us.
Thank you in advance and hope to see you again in the 2021 contest.
Here's an example of virtualizing a lab course.
MathWorks is please to offer a new training course, Power Electronics Control Design with Simulink and Simscape.
This one-day course focuses on modeling and controlling power electronic systems in the Simulink® environment using Simscape Electrical™. Topics include:
- Modeling direct current (dc) power electronic components
- Controlling the level of fidelity in a model
- Developing controls for power electronics
- Modeling three-phase alternating current (ac) power electronic components
- Controlling power electronics for motor drive applications
Right now ThingSpeak supports up to 8 fields of data plus the status and three position fields. If you could have more fields, how many would you want? I have one channel of control settings for a project that I would have used up to 12, but no more than that.
Did you know you can change your user id? We went through a short time where everyone was auto assigned a long user id with 'mwa' and a bunch of numbers that couldn't be changed. You can now make it something more relevant to your actual IoT persona. Click on your user picture or icon on the upper right. Select 'My Profile' and click the Edit button under username. Share your interesting IoT themed names here.
Hi everyone,
I am a third year BEng Energy Engineering student. I am looking at the design, modelling and peformance of an HVDC power converter for use in offshore wind for my final year dissertation. Power electronics is a new area for me and I am also new to simulink/ simscape elctrical.
Could anyone provide some useful examples of MMC (in particular rectifiers), or some advice for designing in simscape electrical. I am struggling with the design of PWM control especially. I aim to make a scaled down version of the MMC in Simulink but so far have had no luck. If anyone can help I would be really appreciative.
Thanks in advance.
Joe
Hi everybody!I've realized a DC/DC Buck Converter Model with closed loop control system. I need to limit the overshoot in the step response of the submitted system. I've already tried to tune the controller in the PID Tuner by manually adjusting the overshoot by moving the response time slider, as it is said in this article: https://it.mathworks.com/help/slcontrol/gs/automated-tuning-of-simulink-pid-controller-block.html The problem is that it is not accurate. I manage to get an overshoot of 4.77% or 5.4%, whereas i need to set the parameters in order that the overshoot is 5%. Should I use TuningGoal.Overshoot? How am I supposed to do? How should I set the input and output in my model? I've read Matlab documentation but I didn't catch that. Thanks in advance!
