Resultados de

munther Aljaf
munther Aljaf
Última actividad el 17 de Mayo de 2022

upload temperature and ecg to thingspeak

i want to send temperature read to field1 and ecg read to field2
how can i write the code
and i have another problem that i don't have ecg code to thingspeak
rafihath saleh
rafihath saleh
Última actividad el 16 de Mayo de 2022

Thingspeak free 3M messages renewal each year.

I wanted to ask of 3M messages of thingspeak free account will renew every year? Thank You

Amro Abu draz
Amro Abu draz
Última actividad el 16 de Mayo de 2022

code for Wind Rose plotting

I want code for plotting windrose in matlab
I have 2 type of data for plot that is wind speed and wind direction
pls I want it quickly .
Kirito23
Kirito23
Última actividad el 14 de Mayo de 2022

Drawing Windrose on matlab

Hi, How can I draw windrose on matlab,I have attached sample data for you, sorry for the inconvenience

Ma. Louvil Abasolo
Ma. Louvil Abasolo
Última actividad el 16 de Mayo de 2022

Only 0 points available in the channel.

WHAT DOES THIS MEAN PLS?
Need help :(
Warning: 'Unable to read 500 points as requested. Only 0 points available in the channel.
Hi,
I have two DGs and I want a secondary control between these two DGs using mpc toolbox. I don't know where I am going wrong with it. it is not working. when I am trying to change the load the frequency is still the same. Can anyone please help?
Thanks
Lorenzo Scavarda
Lorenzo Scavarda
Última actividad el 8 de Jun. de 2022

Display message on ThingSpeak

Good morning,
I'm working with an Arduino MKR 1010 which takes information about weather from the website "api.openweathermap.org". On a ThingSpeak dashboard I displayed the main numbers (float) information like: temperature, wind speed, humidity, etc. Moreover, from the openweathermap I can also get string sentence (e.g. "light rain" or "broken clouds" etc.). I'm wondering if there is a way to display on the ThingSpeak dashboard string fields. Indeed, in the ThingSpeak Channel Settings I added an extra Field in order to store these string words but I don't know how to print them in the dashboard.
Someone can help me?
Thanks in advance,
Lorenzo
Hey guys, I am trying to get a certain value from this webpage (wave height in metres) and store it in a variable. whenever I test my API, I get this error. I have even tried existing examples that other people claim are working for them and they do not work for me.
Error parsing document, try a different parse string.
This is the webpage I am taking the information from.
https://mhl.nsw.gov.au/Station-SYDDOW
This is the current Xpath that I am using for the swell height value I want.
/html/body/div[3]/div/main/div[3]/div[1]/mhl-datatables/div/div[1]/div/ngx-datatable/div/datatable-body/datatable-selection/datatable-scroller/datatable-row-wrapper/datatable-body-row/div[2]/datatable-body-cell[2]/div/span
IK
IK
Última actividad el 6 de Mayo de 2022

making subplot and gif

Hello,
I wanna make a figure that has one image and three plots.
So, I tried to put an image the first column next to three plots, but it didn't work.
what should I do?
and, I need to make 30 figures according to my images.
how should I make code with 'for' syntex?
figure(1);
subplot(3,2,[1,5]);
width = 1;
height = 1;
img = imread('MYIAMGES.png');
image(img)
set(gca, 'units','normalized','position',[0 0 width height]) %'XTick',zeros(1,0),'YTick',zeros(1,0));
subplot(3,2,2);
plot(date,A,'-');
subplot(3,2,4);
plot(date,B,'-');
hold on
plot(date,C,'-');
plot(date,D,'-');
subplot(3,2,6);
plot(date,E,'-');
hold on
plot(date,F,'-');
Hullo Everyone. I have published a video on the MathWorks YouTube channel that explains active, reactive and apparent power. It is less than 9 minutes and so can be viewed over a coffee break. Here's the link https://www.youtube.com/watch?v=DCUwK6AfzcM
When discussing Q&As in MATLAB Answers, we oftentimes need to reference a function in MATLAB Documentation. The process is quite tedious. You need to search the function in Documentation and copy & paste it into Answers. Now, you can simply use the ‘@doc:’ in Answers’ editor to easily reference a function in Documentation.
How does it work?
1) Simply type ‘@’ and you will see the option to add a Doc link. You can also directly type ‘@doc:’.
2) Start typing the function name. You will see a list of choices on the menu.
3)Select the function and a hyperlink to that function's doc page will be automatically inserted.
Give it a try and we hope you like it! Leave a comment if you have any questions or suggestions.
Hello
I am trying to run the example code for "Calculate and display average humidity" using my channel data. I filled in the blanks:
  1. readChannelID
  2. humidityFieldID
  3. NumMinutes=720
The program returns display(avgHumidity,'Average Humidity') with "NAN" instead of the correct average. I have a free ThingSpeak account but have been following temperature & humidity every hour for the last 9 months. I would also like to store this average value on the same channel on a new field. Can anyone help me?
Thank You
I'd definitely attend/participate.
27%
I would probably attend.
23%
I might or might not attend.
21%
I would not be interested.
29%
1271 votos
Hello,
I need an endpoint to retrive my file with data from my channel. Do you think is this possible?
Notice that i do not want to press export data button, i want an endpoint to use in a personal project.
Thank you.
Hi,
I am using matlab fuction block to calculate duty ratio for a MOSFET . How do I incorporate time delay in the calculated duty cycle. Duty cycle of S3 should be delayed by d1 in the picture.Kindly help
Chen Lin
Chen Lin
Última actividad el 28 de Abr. de 2022

User Spotlight: Bruno Luong

Today, I'm spotlighting Bruno Luong, our newest MVP. Next, let's 'talk about Bruno'!
When we look at Bruno's stats chart below, we'll notice Bruno achieved this major milestone just in 3 years! This is amazing, right? Actually, we are still underestimating Bruno's contribution to the larger MATLAB/Simulink user community by just looking at his reputation points.
Before he started his active contribution to Answers in 2019, Bruno had been a top contributor to the newsgroup for MATLAB & Simulink products – comp.soft-sys-matlab. Sounds a bit old school? Leave a comment if you have participated or are still participating in the newsgroup. I remember back in 2016 when I first chatted with Bruno, he already had about 500 posts in the newsgroup!
Besides helping users with their questions, Bruno has also been contributing high-quality files to File Exchange. Check out the two prestigious badges below. They are showing the highest recognition from both the MathWorks team and millions of community users.
Congratulations, Bruno. We really appreciate your outstanding and long-time contributions to the MATLAB/Simulink user community!

Hello, I am currently working on a simple android app for a smart irrigation system. Basically the app lets the user enter the name of the plant and then lists all the plants of the garden. Then, I have divided plants into three categories depending on their watering needs and I have created three int values for the amount of plants per group. Essentially I want to send these three values to a thingspeak channel I created, to 3 separated fields. I am not familiar at all with server programming in Java so I would really appreciate any kind of help in how to do this.

Dirk Bräu
Dirk Bräu
Última actividad el 20 de Mayo de 2022

React "No data check" for a single field

Can not pick just a single field for "No data check", just the whole channel. Is there any way to change?

I have a datasheet of an induction motor (as figure below). I want to simulate it on matlab/simulink, but I don't know it's parameters (Lls, Llr, Lm, Rr, Rs).

I tried to search about open circuit test and blocked rotor test to determine these parameters, but some of information doesn't appear on datasheet and I don't have the real motor to test on it (datasheet is only think I have).

Could someone help me with this?

I have a personal account which I use for my home projects, along with a paid license which I use for monitoring a set of sensors in a remote building.

All my sensors went offline at about the same time, but I am only just noticing this now, because I have been focused on why the remote location went offline, thinking that it was an issue with the internet or WiFi at that location, rather than a problem with posting the data!

All my monitoring setups are using electricImp devices to post data to ThinkSpeak and have been in some cases, running for several years without any issues. All the devices are now returning a 400 - invalid constant string error.

See logs below.

|2022-04-19T13:30:07.017 +00:00	[Agent]	https://api.thingspeak.com/update?api_key=XXXXXXX&status=OK&created_at=2022-04-19 13:30:01 UTC&field4=0.00&field3=0.00&field6=0.00&field5=0.00&field2=14.65&field1=2022-04-19%2013%3A30%3A01%20UTC&status=OK&field8=0.6129&field7=0.00&created_at=2022-04-19%2013%3A30%3A01%20UTC
    2022-04-19T13:30:07.086 +00:00	[Agent]	PUSH: 400 - invalid constant string

I modified a device to not send the date in field 1 on one device because I thought that might be causing the problem, but it is not clear to me what changed. I have been sending data like this for a long time.

Any ideas appreciated.

Thanks