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Dear Community Staff
I have two channels, the first is working good the second not working, my license is free, I don't know what happens.
The configuration is the same, Somebody has any idea? how to solve this?
thank you
Rafael
how can i update my thingspeak using mit app (sending value through mit app to thingspeak for a particular fiels)
Hello community, I am trying to subscribe using the MQTT protocol.
The problem occurs when I try to request the subscribe, I send the subscribe and my connection with the server is closed.
tiledlayout, introduced in MATLAB R2019b, offers a flexible way to add subplots, or tiles, to a figure.
Reviewing two changes to tiledlayout in MATLAB R2021a
- The new TileIndexing property
- Changes to TileSpacing and Padding properties
1) TileIndexing
By default, axes within a tiled layout are created from left to right, top to bottom, but sometimes it's better to organize plots column-wise from top to bottom and then left to right. Starting in r2021a, the TileIndexing property of tiledlayout specifies the direction of flow when adding new tiles.
tiledlayout(__,'TileIndexing','rowmajor') creates tiles by row (default).
tiledlayout(__,'TileIndexing','columnmajor') creates tiles by column.
.
2) TileSpacing & Padding changes
Some changes have been made to the spacing properties of tiles created by tiledlayout.
TileSpacing: sets the spacing between tiles.
- "loose" is the new default and replaces "normal" which is no longer recommended but is still accepted.
- "tight" replaces "none" and brings the tiles closer together still leaving space for axis ticks and labels.
- "none" results in tile borders touching, following the true meaning of none.
- "compact" is unchanged and has slightly more space between tiles than "tight".
Padding: sets the spacing of the figure margins.
- "loose" is the new default and replaces "normal" which is no longer recommended but is still accepted.
- "tight" replaces "none" and reduces the figure margins. "none" is no longer recommended but is still accepted.
- "compact" is unchanged and adds slightly more marginal space than "tight".
- Reducing the figure margins to a true none is still not an option.
The release notes show a comparison of these properties between r2020b and r2021a.
Here's what the new TileSpacing options (left column of figures below) and Padding options (right column) look like in R2021a. Spacing properties are written in the figure names.
.
And here's a grid of all 12 combinations of the 4 TileSpacing options and 3 Padding options in R2021a.
.
Code used to generate these figures
%% Animate the RowMajor and ColumnMajor indexing with colored tiles
fig1 = figure('position',[200 200 560 420]);
tlo1 = tiledlayout(fig1, 3, 3, 'TileIndexing','rowmajor');
title(tlo1, 'RowMajor indexing')
fig2 = figure('position',[760 200 560 420]);
tlo2 = tiledlayout(fig2, 3, 3, 'TileIndexing','columnmajor');
title(tlo2, 'ColumnMajor indexing')
colors = jet(9); drawnow()
for i = 1:9
ax = nexttile(tlo1);
ax.Color = colors(i,:);
text(ax, .5, .5, num2str(i), 'Horiz','Cent','Vert','Mid','Fontsize',24)
ax = nexttile(tlo2);
ax.Color = colors(i,:);
text(ax, .5, .5, num2str(i), 'Horiz','Cent','Vert','Mid','Fontsize',24) drawnow
pause(.3)
end%% Show TileSpacing options tileSpacing = ["loose","compact","tight","none"]; figHeight = 140; % unit: pixels figPosY = fliplr(50 : figHeight+32 : (figHeight+30)*numel(tileSpacing));
for i = 1:numel(tileSpacing)
uif = uifigure('Units','Pixels','Position', [150 figPosY(i) 580 figHeight], ...
'Name', ['TileSpacing: ', tileSpacing{i}]);
tlo = tiledlayout(uif,1,3,'TileSpacing',tileSpacing(i));
h = arrayfun(@(i)nexttile(tlo), 1:tlo.GridSize(2));
box(h,'on')
drawnow()
end
%% Show Padding options
padding = ["loose","compact","tight"];
for i = 1:numel(padding)
uif = uifigure('Units','Pixels','Position', [732 figPosY(i) 580 figHeight], ...
'Name', ['Padding: ', padding{i}]);
tlo = tiledlayout(uif,1,3,'Padding',padding(i));
h = arrayfun(@(i)nexttile(tlo), 1:tlo.GridSize(2));
box(h,'on')
drawnow()
end
%% Show all combinations of TileSpacing and Padding options
tileSpacing = ["loose","compact","tight","none"];
padding = ["loose","compact","tight"];
[tsIdx, padIdx] = meshgrid(1:numel(tileSpacing), 1:numel(padding));
figSize = [320 220]; % width, height (pixels)
figPosX = 150 + (figSize(1)+2)*(0:numel(tileSpacing)-1);
figPosY = 50 + (figSize(2)+32)*(0:numel(padding)-1);
[figX, figY] = meshgrid(figPosX, fliplr(figPosY));
for i = 1:numel(padIdx)
uif = uifigure('Units','pixels','Position',[figX(i), figY(i), figSize], ...
'name', ['TS: ', tileSpacing{tsIdx(i)}, ', Pad: ', padding{padIdx(i)}]);
tlo = tiledlayout(uif,2,2,'TileSpacing',tileSpacing(tsIdx(i)),'Padding',padding(padIdx(i)));
h = arrayfun(@(i)nexttile(tlo), 1:prod(tlo.GridSize));
box(h,'on')
drawnow()
end
where is the problem in this code, please help me..
esp 01 code-
#include "ThingSpeak.h" #include ESP8266WiFi.h
char ssid[] = "xxxxx"; // SSID here char pass[] = "xxxxxxx"; // Passowrd here
unsigned long Channel_ID = xxxxxxx; // Channel ID const char * myWriteAPIKey = "xxxxxx"; // Write API key
const int Field_Number_1 = 1; const int Field_Number_2 = 2; const int Field_Number_3 = 3; const int Field_Number_4 = 4; const int Field_Number_5 = 5; String value = ""; int value_1 = 0, value_2 = 0, value_3 = 0, value_4 = 0, value_5 = 0; WiFiClient client;
void setup() { Serial.begin(115200); WiFi.mode(WIFI_STA); ThingSpeak.begin(client); internet(); }
void loop() { internet(); if (Serial.available() > 0) { delay(100); while (Serial.available() > 0) { value = Serial.readString(); if (value[0] == '*') { if (value[11] == '#') { value_1 = ((value[1] - 0x30) * 10 + (value[2] - 0x30)); value_2 = ((value[3] - 0x30) * 10 + (value[4] - 0x30)); value_3 = ((value[5] - 0x30) * 10 + (value[6] - 0x30)); value_4 = ((value[7] - 0x30) * 10 + (value[8] - 0x30)); value_5 = ((value[9] - 0x30) * 10 + (value[10] - 0x30)); }
}
}
}
upload();
}void internet() { if (WiFi.status() != WL_CONNECTED) { while (WiFi.status() != WL_CONNECTED) { WiFi.begin(ssid, pass); delay(5000); } } }
void upload() { ThingSpeak.writeField(Channel_ID, Field_Number_1, value_1, myWriteAPIKey); delay(15000); ThingSpeak.writeField(Channel_ID, Field_Number_2, value_2, myWriteAPIKey); delay(15000); ThingSpeak.writeField(Channel_ID, Field_Number_3, value_3, myWriteAPIKey); delay(15000); ThingSpeak.writeField(Channel_ID, Field_Number_4, value_4, myWriteAPIKey); delay(15000); ThingSpeak.writeField(Channel_ID, Field_Number_5, value_5, myWriteAPIKey); delay(15000); value = ""; }
arduino code -
#include dht.h #define soilWet 56 #define soilDry 50
const int LM35 = A0; // Soil Temperature pin
// lowest and highest sensor readings (Rain Detection) const int sensorMin = 0; // sensor minimum const int sensorMax = 1024; // sensor maximum
#define sensorPower 5 // Motor pin
int obstaclePin = 10; // IR sensor pin 7 int hasObstacle = HIGH; // High means no obstacle
const int trigger = 34; const int echo = 35; long T; float distanceCM;
dht DHT; #define DHT11_PIN 30 int humi,temp;
void setup(){ pinMode(sensorPower, OUTPUT); // Initially keep the Motor OFF digitalWrite(sensorPower, HIGH);
pinMode(obstaclePin, INPUT);
pinMode(trigger, OUTPUT); pinMode(echo, INPUT); Serial.begin(9600); }
void loop() { int moisture = (100 - ((analogRead(A1)/1023.00)*100));
digitalWrite(trigger, LOW); delay(10); digitalWrite(trigger, HIGH); delayMicroseconds(10); digitalWrite(trigger, LOW); T = pulseIn(echo, HIGH); distanceCM = T * 0.034; distanceCM = distanceCM / 2;
int ADC; float tempS; ADC = analogRead(LM35); tempS = (ADC * 4.88); tempS = (tempS / 10);
int sensorReading = analogRead(A2); // Rain detection pin A2 int range = map(sensorReading, sensorMin, sensorMax, 0, 3); // Rain detection
switch (range) { case 0: // Sensor getting wet Serial.println("Rain Status : **Raining**"); break; case 1: // Sensor getting wet Serial.println("Rain Status : *Rain Warning*"); break; case 2: // Sensor dry - To shut this up delete the " Serial.println("Not Raining"); " below. Serial.println("Rain Status : Not Raining"); break; }
DHT.read11(DHT11_PIN); humi=DHT.humidity; temp=DHT.temperature;
Serial.print("Air Temperature = "); Serial.print(temp); Serial.println("°C "); Serial.print("Air Humidity = "); Serial.print(humi); Serial.println(" %"); Serial.print("Distance = "); Serial.print(distanceCM); Serial.println("cm"); Serial.print("Soil Temperature = "); Serial.print(tempS); Serial.println("°C"); Serial.print("Soil Moisture = "); Serial.print(moisture); Serial.println(" %");
if (moisture < soilWet) { Serial.println("Status: Soil is too wet"); } else if (moisture >= soilWet && moisture < soilDry) { Serial.println("Status: Soil moisture is perfect"); } else { Serial.println("Status: Soil is too dry - time to water!"); }
if (moisture < 35) { digitalWrite(sensorPower, HIGH); // turn ON motor Serial.println("Motor is ON"); } if (moisture > 35 && moisture < 37) { digitalWrite(sensorPower, HIGH); //turn ON motor Serial.println("Motor is ON"); } if (moisture > 38) { digitalWrite(sensorPower, LOW); // turn OFF motor Serial.println("Motor is OFF"); }
hasObstacle = digitalRead(obstaclePin); //Reads the output of the obstacle sensor from the 7th PIN of the Digital section of the arduino
if (hasObstacle == LOW) //LOW means something is ahead
{
Serial.println("Something is ahead !!!");
}
else {
Serial.println("Path is clear");
}Serial.println("--------------------------------------------------------------------------"); Serial.println("");
delay(3000); }
please help me to make this working for multiple sensors data.
Hi,
Has anybody seen a discussion on interfacing Samsung watch Active 2 with Thingspeak ?
Regards,
Mario
https://developer.twitter.com/en/docs/twitter-api/tweets/lookup/introduction
Hello,
I try to do an aplication that warns me when is flood or when is a fire. I tryed to use ThingTweet to receive new status (better to send a message) when fire or flood happen. But not work that fine. Sometimes I receive a new status in my Tweeter account sometimes not. And this is the most annoying thing. To know that is working just some how. Digging for answers I didn't found much. But I saw Twitter changed the API version to: https://developer.twitter.com/en/docs/twitter-api/early-access. Please, I need some assistance to finish my project ! Thank you
Hi,
I have an urgent problem. I am reading data from a channel to my channel and visualizing it.
I am reading data from fields 5 and 6 from daterange (2 hours). I manage to get data from channel (below) but I get the message "Warning: Non-numeric data was found. This could mean that you are attempting to retrieve data from a channel or field that has non-numeric points. Set 'OutputFormat' property to 'table' or 'timetable' to read non-numeric data. "
Probably due to that it is not uploaded to my channel with the thingSpeakWrite. If I read the same time period from fields 1 and 2 I manage to write that to my channel but for some reason fields 5 and 6 have a different format or what?
Could you please help me out here :).
data1 =
30.9000 NaN
NaN NaN
NaN 26.1000
NaN NaN
NaN NaN
NaN NaN
NaN NaN
30.9000 NaN
NaN NaN
NaN NaN
NaN NaN
30.8000 NaN
NaN NaN
NaN NaN
NaN NaN
NaN NaN
let me invite you to distant Second international conference "MATLAB and computer calculations in education, science and engineering" April 26 – 29, 2021 р., Kyiv"
First communication
It is impossible to imagine recent science and engineering without mathematical packages like MATLAB, MathCAD, Mathematica, Maple etc. However, they have not been sufficiently used in education yet. To improve the situation we manage these conferences. This will be the Second conference in Ukraine. The First was carried out in May 2019. Its results may be seen here. Unfortunately, it should be carried out remotely this time. However, it is to happen to have the tradition saved!
Scientists, engineers, educators from universities and high schools are welcome! Regretfully, we need to restrict the scope of topics to be considered this time. They are to be associated with education in university or school, methodology of mathematical package application, teaching disciplines with them. Variety of problems we see in such a way this time:
Problems and sections: MATLAB and computer use in universities MATLAB and computer use and computer use in high school
Conference will be held remotely under supervision of National aviation university (Kyiv). Like last time, (remote) master classes will be carried out to, from our point, to facilitate MATLAB use for beginners in education. To facilitate remote participation of foreign guests, two kinds of sessions will be managed: Morning sections, 10 a.m. – 15 p.m. Kyiv’ time will use Ukrainian and Russian languages. Evening sections, 18 p.m. -:- 21 p.m. Kyiv’ time but 10 a.m. – 1 p.m. in San Francisco will use English, for participants from Europe and USA.
Organizational Committee and rules for Abstracts may be seen here, or in department site or asked for per e-mail Ye_Gayev@i.ua and YevgenyAlGayev@gmail.com
Important dates Till April 10, 2021 – registration via form or directly via above addresses. Till April 20, 2021 р. – accepting Abstracts, 4 pages prepared on rules. Opening the conference April 26, 2021. Conference days 26 – 28, April 2021. Book of Abstracts will be placed in the Internet and in https://www.academia.edu/; DOI will supplement them.
It is important that three master-classes are to be carried out in Saturday and Sunday, April 24 and 25. Their topics are:
1. Prof. Yevgeny Gayev (NAU) «Algorithms that inspire to education»; 2. Prof. Sergii Iglin (Kharkov) «Heat Transfer problems with MATLAB»; 3. Prof. Sergey Sylantyev (Kyiv Nat. univ.) «AWS Cloud Services and Cloud Calculation».
Potential participants are kindly asked to register as soon as possible for enabling our next management steps!
Hi, how do I convert daily data to yearly?
This is a small portion of my data:
27/12/2017 0.805 8.467 4.849 28/12/2017 0.554 4.936 3.72 29/12/2017 1.098 7.71 5.999 30/12/2017 2.725 19.78 14.78 31/12/2017 1.238 10.59 8.414 1/1/2018 1.187 8.252 7.914 2/1/2018 1.521 10.36 10.05 3/1/2018 1.922 12.83 15.46 4/1/2018 1.692 10.28 13.63
An error occurred while executing the code. I was referring this site : https://in.mathworks.com/help/thingspeak/monitor-channel-inactivity-using-multiple-thingSpeak-apps.html
While executing the code
Error using matlab.internal.webservices.HTTPConnector/copyContentToByteArray (line 373) The server returned the status 400 with message "Bad Request" in response to the request to URL https://api.thingspeak.com/apps/thinghttp/send_request?3DOHBYUXDXD4OVIV=WA327EPXB1DWM0FA.
Error in readContentFromWebService (line 46) byteArray = copyContentToByteArray(connection);
Error in webread (line 125) [varargout{1:nargout}] = readContentFromWebService(connection, options);
Error in Custom (no starter code) 2 (line 3) Trigger_TalkBack = webread(url,'3DOHBYUXDXD4OVIV',ThingHTTP_APIKEYS.To_Trigger_TalkBack) %Trigger TalkBack via ThingHTTP
This is been showing
My Code :
ThingHTTP_APIKEYS = struct('To_Trigger_TalkBack','WA327EPXB1DWM0FA');% Your ThingHTTP app API keys url = 'https://api.thingspeak.com/apps/thinghttp/send_request'; Trigger_TalkBack = webread(url,'3DOHBYUXDXD4OVIV',ThingHTTP_APIKEYS.To_Trigger_TalkBack) %Trigger TalkBack via ThingHTTP
Did you know you can use most emoticons in text objects?
Most emoticons are just unicode characters. Using them as characters in Matlab is as simple as finding their numeric representation and then converting the numeric value back to character. Not all emoticons are convertible in Matlab.
Here's a secret message with emoticons. Use char(x) to decode it.
x = [79 77 71 33 32 55357 56878 32 104 97 118 101 32 121 111 ...
117 32 117 112 100 97 116 101 100 32 116 111 32 77 97 116 ...
108 97 98 32 55358 56595 32 114 50 48 50 49 97 32 121 101 116 32 8265];
Happy St. Patrick's Day!
fig = figure('MenuBar','none','Color', [0 .62 .376]); % Shamrock green
ax = axes(fig,'Units','Normalized','Position',[0 0 1 1]);
axis(ax,'off')
axis(ax,'equal')
hold(ax,'on')
xlim(ax,[-1,1]); ylim(ax,[-1,1])
text(ax, 0, 0, char(9752), 'VerticalAlignment','middle','HorizontalAlignment','center','FontSize', 200)
str = num2cell('Happy St Patrick''s day!');
th = linspace(-pi/2,pi/2,numel(str));
txtHandle = text(ax,sin(th)*.8, cos(th)*.8, str, 'VerticalAlignment','middle','HorizontalAlignment','center','FontSize', 25);
set(txtHandle,{'rotation'}, num2cell(rad2deg(-th')))
thr = 0.017;
rotateCCW = @(xyz)([cos(thr) -sin(thr) 0; sin(thr), cos(thr), 0; 0 0 1]*xyz.').';
while all(isvalid(txtHandle))
newposition = rotateCCW(vertcat(txtHandle.Position));
set(txtHandle,{'position'}, mat2cell(newposition,ones(numel(txtHandle),1),3), ...
{'rotation'}, num2cell([txtHandle.Rotation].'+thr*180/pi))
drawnow()
end
Can't get the last data from a particular channel. is there any way to help me out
I have constructed a circuit with a particle argon device and a temperature/humidity sensor. I am receiving the data to my argon console and it is working properly as there is a hook-sent happening as well as a successful hook-response. Also when I take a look at my ThingSpeak channel it says that there are 77 entries but my problem is there is no drawing in the graph. Everything seems to be done correctly but still no graph.
We've all been there. You've got some kind of output that displays perfectly in the command window and you just want to capture that display as a string so you can use it again somewhere else. Maybe it's a multidimensional array, a table, a structure, or a fit object that perfectly displays the information you need in a neat and tidy format but when you try to recreate the display in a string variable it's like reconstructing the Taj Mahal out of legos.
Enter Matlab r2021a > formattedDisplayText()
Use str=formattedDisplayText(var) the same way you use disp(var) except instead of displaying the output, it's stored as a string as it would appear in the command window.
Additional name-value pairs allow you to
- Specify a numeric format
- Specify loose|compact line spacing
- Display true|false instead of 1|0 for logical values
- Include or suppress markup formatting that may appear in the display such as the bold headers in tables.
Demo: Record the input table and results of a polynomial curve fit
load census [fitobj, gof] = fit(cdate, pop, 'poly3', 'normalize', 'on')
Results printed to the command window:
fitobj =
Linear model Poly3:
fitobj(x) = p1*x^3 + p2*x^2 + p3*x + p4
where x is normalized by mean 1890 and std 62.05
Coefficients (with 95% confidence bounds):
p1 = 0.921 (-0.9743, 2.816)
p2 = 25.18 (23.57, 26.79)
p3 = 73.86 (70.33, 77.39)
p4 = 61.74 (59.69, 63.8)
gof = struct with fields:
sse: 149.77
rsquare: 0.99879
dfe: 17
adjrsquare: 0.99857
rmse: 2.9682Capture the input table, the printed fit object, and goodness-of-fit structure as strings:
rawDataStr = formattedDisplayText(table(cdate,pop),'SuppressMarkup',true) fitStr = formattedDisplayText(fitobj) gofStr = formattedDisplayText(gof)
Display the strings:
rawDataStr =
" cdate pop
_____ _____
1790 3.9
1800 5.3
1810 7.2
1820 9.6
1830 12.9
1840 17.1
1850 23.1
1860 31.4
1870 38.6
1880 50.2
1890 62.9
1900 76
1910 92
1920 105.7
1930 122.8
1940 131.7
1950 150.7
1960 179
1970 205
1980 226.5
1990 248.7
"
fitStr =
" Linear model Poly3:
ary(x) = p1*x^3 + p2*x^2 + p3*x + p4
where x is normalized by mean 1890 and std 62.05
Coefficients (with 95% confidence bounds):
p1 = 0.921 (-0.9743, 2.816)
p2 = 25.18 (23.57, 26.79)
p3 = 73.86 (70.33, 77.39)
p4 = 61.74 (59.69, 63.8)
"
gofStr =
" sse: 149.77
rsquare: 0.99879
dfe: 17
adjrsquare: 0.99857
rmse: 2.9682
"
Combine the strings into a single string and write it to a text file in your temp directory:
txt = strjoin([rawDataStr; fitStr; gofStr],[newline newline]); file = fullfile(tempdir,'results.txt'); fid = fopen(file,'w+'); cleanup = onCleanup(@()fclose(fid)); fprintf(fid, '%s', txt); clear cleanup
Open results.txt.
winopen(file) % for Windows platforms
Hi All,
Quick question regarding deriving PM flux linkage [Wb] from a torque constant estimated from data on a PMLSM.
I have an estimated torque constant Kt [N/A], which is from experimental test data. I will now parameterising my Simscape PMLSM block from this torque constant.
The literature seems confusing, to derive PM flux linkage [Wb] from the experimental torque contant do i include the (3/2) constant. Some examples include the constant and some omit, which one of the following is preferred for deriving the PM flux linkage?
Thanks
Patrick
Hi,
i have made a data logger with arduino and esp8266.the data being the temperature and humidity.
what i wanted to know is there some way i can set a threshold value and thingspeak reacts on it if data is not uploaded for 5 mins and the thinkspeak should through a message to arudio ide
can i use talkback for this?
Hallo,ich bin Anfänger und nutze ThingSpeak um meine Wetterdaten (ESP8266 mit BME280 Sensor) und meine Feinstaubdaten (ESP8266 und PMS5003) anzuzeigen. Der erste ESP überträgt Temperatur, Luftfeuchte und Luftdruck in die Felder 1-3 bei ThingSpeak und der zweite ESP die Feinstaubwerte in die Felder 5-7 bei ThingSpeak. Alle 30 Sekunden werden jeweils Daten geschickt. Im Serial Monitor erfolgt die Übertragung wie geplant im Programm. Mein Problem: Die Ausgabe in ThingSpeak enthält viele Aussetzer. Es gehen Daten verloren und werden nicht angezeigt.
Freue mich über Rückmeldungen. Ulli
Hello, while posting the data i am not getting the Acknoweldgement
Hola a todos, trabajo en un proceso de investigación para mi clase de IoT, donde tengo que presentar un SWOT, sobre la plataforma ThingSpeak ? algún aporte para este tema: gracias anticipadas.!
