搜索
how can we modify the parameters to have a value with one decimal after the comma ?
thank you in advance,
This is a very basic thing but I am just beginning and I can't find the solution. When I increase the iframe width and height, the outside frame gets bigger but the graphs itself stay the same size. I read in a forum that suggests "auto" sizing feature by changing the iframe's src URL to something like the following:
http://thingspeak.com/channels/423600_ID/charts/2?width=auto&height=auto
I did and the size of the graph did scale well. However, the Number of entries to retrieve is default, which 100. Which means that after the first 100 points, as more entries comes, the first ones disappears. Please how can i increase the number of entries, lets say to the maximum?
Thank you in advance.
Hey guys! i recentlly written a code for patient health monitoring system using arduino and configured with that thingspeak api so that i could collect the data gathered by my pulse rate sensor and temparature sensor to thingspeak cloud and things went very fine my programe is executing fine but the data is not coming on thingspeak cloud..please guys it's so urgent for me cause i have to show this project as mu finao year demonstration project please help me or call me my email is durgeshc1402@gmail.com and call me on 7355104033.. it's so urgent for me to get this project working . below is the code
#include LiquidCrystal.h
LiquidCrystal lcd(12, 11, 5, 4, 3, 2); #include SoftwareSerial.h #include ThingSpeak.h float pulse = 0; float temp= 0; SoftwareSerial ser(9,10); String apiKey = "KT8O9XXE4K5WMVWA"; // Variables int pulsePin = A0; // Pulse Sensor purple wire connected to analog pin 0 int blinkPin = 7 ; // pin to blink led at each beat int fadePin = 13; // pin to do fancy classy fading blink at each beat int fadeRate = 0; // used to fade LED on with PWM on fadePin
// Volatile Variables, used in the interrupt service routine!
volatile int BPM; // int that holds raw Analog in 0. updated every 2mS volatile int Signal; // holds the incoming raw data volatile int IBI = 600; // int that holds the time interval between beats! Must be seeded! volatile boolean Pulse = false; // "True" when User's live heartbeat is detected. "False" when nota "live beat". volatile boolean QS = false; // becomes true when Arduoino finds a beat.
// Regards Serial OutPut -- Set This Up to your needs static boolean serialVisual = true; // Set to 'false' by Default. Re-set to 'true' to see Arduino Serial Monitor ASCII Visual Pulse volatile int rate[10]; // array to hold last ten IBI values volatile unsigned long sampleCounter = 0; // used to determine pulse timing volatile unsigned long lastBeatTime = 0; // used to find IBI volatile int P = 512; // used to find peak in pulse wave, seeded volatile int T = 512; // used to find trough in pulse wave, seeded volatile int thresh = 525; // used to find instant moment of heart beat, seeded volatile int amp = 100; // used to hold amplitude of pulse waveform, seeded volatile boolean firstBeat = true; // used to seed rate array so we startup with reasonable BPM volatile boolean secondBeat = false; // used to seed rate array so we startup with reasonable BPM
void setup() { lcd.begin(16, 2); pinMode(blinkPin,OUTPUT); // pin that will blink to your heartbeat! pinMode(fadePin,OUTPUT); // pin that will fade to your heartbeat! Serial.begin(115200); // we agree to talk fast! interruptSetup(); // sets up to read Pulse Sensor signal every 2mS
// IF YOU ARE POWERING The Pulse Sensor AT VOLTAGE LESS THAN THE BOARD VOLTAGE,
// UN-COMMENT THE NEXT LINE AND APPLY THAT VOLTAGE TO THE A-REF PIN
// analogReference(EXTERNAL);
lcd.clear(); lcd.setCursor(0,0); lcd.print(" Patient Health"); lcd.setCursor(0,1); lcd.print(" Monitoring "); delay(4000); lcd.clear(); lcd.setCursor(0,0); lcd.print("Initializing...."); delay(5000); lcd.clear(); lcd.setCursor(0,0); lcd.print("Getting Data...."); ser.begin(9600); ser.println("AT"); delay(1000); ser.println("AT+GMR"); delay(1000); ser.println("AT+CWMODE=3"); delay(1000); ser.println("AT+RST"); delay(5000); ser.println("AT+CIPMUX=1"); delay(1000);
String cmd="AT+CWJAP=\"durgesh\",\"eeeeeeee\""; ser.println(cmd); delay(1000); ser.println("AT+CIFSR"); delay(1000); }
// Where the Magic Happens void loop() { serialOutput(); if (QS == true) // A Heartbeat Was Found {
// BPM and IBI have been Determined // Quantified Self "QS" true when arduino finds a heartbeat fadeRate = 255; // Makes the LED Fade Effect Happen, Set 'fadeRate' Variable to 255 to fade LED with pulse serialOutputWhenBeatHappens(); // A Beat Happened, Output that to serial. QS = false; // reset the Quantified Self flag for next time } ledFadeToBeat(); // Makes the LED Fade Effect Happen delay(20); // take a break read_temp(); esp_8266(); } void ledFadeToBeat() { fadeRate -= 15; // set LED fade value fadeRate = constrain(fadeRate,0,255); // keep LED fade value from going into negative numbers! analogWrite(fadePin,fadeRate); // fade LED } void interruptSetup() { // Initializes Timer2 to throw an interrupt every 2mS. TCCR2A = 0x02; // DISABLE PWM ON DIGITAL PINS 3 AND 11, AND GO INTO CTC MODE TCCR2B = 0x06; // DON'T FORCE COMPARE, 256 PRESCALER OCR2A = 0X7C; // SET THE TOP OF THE COUNT TO 124 FOR 500Hz SAMPLE RATE TIMSK2 = 0x02; // ENABLE INTERRUPT ON MATCH BETWEEN TIMER2 AND OCR2A sei(); // MAKE SURE GLOBAL INTERRUPTS ARE ENABLED } void serialOutput() { // Decide How To Output Serial. if (serialVisual == true) { arduinoSerialMonitorVisual('-', Signal); // goes to function that makes Serial Monitor Visualizer } else { sendDataToSerial('S', Signal); // goes to sendDataToSerial function } } void serialOutputWhenBeatHappens() { if (serialVisual == true) // Code to Make the Serial Monitor Visualizer Work { Serial.print("*** Heart-Beat Happened * "); //ASCII Art Madness Serial.print("BPM: "); Serial.println(BPM); } else { sendDataToSerial('B',BPM); // send heart rate with a 'B' prefix sendDataToSerial('Q',IBI); // send time between beats with a 'Q' prefix } } void arduinoSerialMonitorVisual(char symbol, int data ) { const int sensorMin = 0; // sensor minimum, discovered through experiment const int sensorMax = 1024; // sensor maximum, discovered through experiment int sensorReading = data; // map the sensor range to a range of 12 options: int range = map(sensorReading, sensorMin, sensorMax, 0, 11); // do something different depending on the // range value: switch (range) { case 0: Serial.println(""); /////ASCII Art Madness break; case 1: Serial.println("---"); break; case 2: Serial.println("------"); break; case 3: Serial.println("---------"); break; case 4: Serial.println("------------"); break; case 5: Serial.println("--------------|-"); break; case 6: Serial.println("--------------|---"); break; case 7: Serial.println("--------------|-------"); break; case 8: Serial.println("--------------|----------"); break; case 9: Serial.println("--------------|----------------"); break; case 10: Serial.println("--------------|-------------------"); break; case 11: Serial.println("--------------|-----------------------"); break; } }
void sendDataToSerial(char symbol, int data ) { Serial.print(symbol); Serial.println(data); } ISR(TIMER2_COMPA_vect) //triggered when Timer2 counts to 124 { cli(); // disable interrupts while we do this Signal = analogRead(pulsePin); // read the Pulse Sensor sampleCounter += 2; // keep track of the time in mS with this variable int N = sampleCounter - lastBeatTime; // monitor the time since the last beat to avoid noise // find the peak and trough of the pulse wave
if(Signal < thresh && N > (IBI/5)*3) // avoid dichrotic noise by waiting 3/5 of last IBI { if (Signal < T) // T is the trough { T = Signal; // keep track of lowest point in pulse wave } } if(Signal > thresh && Signal > P) { // thresh condition helps avoid noise P = Signal; // P is the peak } // keep track of highest point in pulse wave // NOW IT'S TIME TO LOOK FOR THE HEART BEAT // signal surges up in value every time there is a pulse if (N > 250) { // avoid high frequency noise if ( (Signal > thresh) && (Pulse == false) && (N > (IBI/5)*3) ) { Pulse = true; // set the Pulse flag when we think there is a pulse digitalWrite(blinkPin,HIGH); // turn on pin 13 LED IBI = sampleCounter - lastBeatTime; // measure time between beats in mS lastBeatTime = sampleCounter; // keep track of time for next pulse
if(secondBeat) { // if this is the second beat, if secondBeat == TRUE secondBeat = false; // clear secondBeat flag for(int i=0; i<=9; i++) // seed the running total to get a realisitic BPM at startup { rate[i] = IBI; } } if(firstBeat) // if it's the first time we found a beat, if firstBeat == TRUE { firstBeat = false; // clear firstBeat flag secondBeat = true; // set the second beat flag sei(); // enable interrupts again return; // IBI value is unreliable so discard it } // keep a running total of the last 10 IBI values word runningTotal = 0; // clear the runningTotal variable for(int i=0; i<=8; i++) { // shift data in the rate array rate[i] = rate[i+1]; // and drop the oldest IBI value runningTotal += rate[i]; // add up the 9 oldest IBI values } rate[9] = IBI; // add the latest IBI to the rate array runningTotal += rate[9]; // add the latest IBI to runningTotal runningTotal /= 10; // average the last 10 IBI values BPM = 60000/runningTotal; // how many beats can fit into a minute? that's BPM! QS = true; // set Quantified Self flag // QS FLAG IS NOT CLEARED INSIDE THIS ISR pulse = BPM; } } if (Signal < thresh && Pulse == true) { // when the values are going down, the beat is over digitalWrite(blinkPin,LOW); // turn off pin 13 LED Pulse = false; // reset the Pulse flag so we can do it again amp = P - T; // get amplitude of the pulse wave thresh = amp/2 + T; // set thresh at 50% of the amplitude P = thresh; // reset these for next time T = thresh; } if (N > 2500) { // if 2.5 seconds go by without a beat thresh = 512; // set thresh default P = 512; // set P default T = 512; // set T default lastBeatTime = sampleCounter; // bring the lastBeatTime up to date firstBeat = true; // set these to avoid noise secondBeat = false; // when we get the heartbeat back } sei(); // enable interrupts when youre done! }// end isr void esp_8266() { // TCP connection AT+CIPSTART=4,"TCP","184.106.153.149",80 String cmd = "AT+CIPSTART=4,\"TCP\",\""; cmd += "184.106.153.149"; // api.thingspeak.com cmd += "\",80"; ser.println(cmd); Serial.println(cmd); if(ser.find("Error")) { Serial.println("AT+CIPSTART error"); return; } String getStr = "GET /update?api_key="; getStr += apiKey; getStr +="&field1="; getStr +=String(temp); getStr +="&field2="; getStr +=String(pulse); getStr += "\r\n\r\n"; // send data length cmd = "AT+CIPSEND=4,"; cmd += String(getStr.length()); ser.println(cmd); Serial.println(cmd); delay(1000); ser.print(getStr); Serial.println(getStr); //thingspeak needs 15 sec delay between updates delay(3000); } void read_temp() { int temp_val = analogRead(A1); float mv = (temp_val/1024.0)*5000; float cel = mv/10; temp = (cel*9)/5 + 32; Serial.print("Temperature:"); Serial.println(temp); lcd.clear(); lcd.setCursor(0,0); lcd.print("BPM :"); lcd.setCursor(7,0); lcd.print(BPM); lcd.setCursor(0,1); lcd.print("Temp.:"); lcd.setCursor(7,1); lcd.print(temp); lcd.setCursor(13,1); lcd.print("F"); }
I'm trying upload data on thingspeak it is not getting updated. We are getting readings on serial monitor. Please advice
Hello:
I am trying to read the position (latitude and longitde) from thingSpeakRead and the terror appears: Dot indexing is not supported for variables of this type
This is my code from MATLAB Visualizations code:
data = thingSpeakRead(1299642, 'location',true)
lon = data.Longitude;
lat = data.Latitude;
figure
geoplot(lat,lon,'red-*')
geobasemap("topographic")
title("Ground Truth Trajectory")
And this is the output: data =
[]
Dot indexing is not supported for variables of this type.
Error in Posicion (line 3) lon = data.Longitude;
Someone knows what is happening?
Thank you
why does this work?
Starting in MATLAB R2021a, name-value arguments have a new optional syntax!
A property name can be paired with its value by an equal sign and the property name is not enclosed in quotes.
Compare the comma-separated name,value syntax to the new equal-sign syntax, either of which can be used in >=r2021a:
- plot(x, y, "b-", "LineWidth", 2)
- plot(x, y, "b-", LineWidth=2)
It comes with some limitations:
- It's recommended to use only one syntax in a function call but if you're feeling rebellious and want to mix the syntaxes, all of the name=value arguments must appear after the comma-separated name,value arguments.
- Like the comma-separated name,value arguments, the name=value arguments must appear after positional arguments.
- Name=value pairs must be used directly in function calls and cannot be wrapped in cell arrays or additional parentheses.
Some other notes:
- The property names are not case-sensitive so color='r' and Color='r' are both supported.
- Partial name matches are also supported. plot(1:5, LineW=4)
The new syntax is helpful in distinguishing property names from property values in long lists of name-value arguments within the same line.
For example, compare the following 2 lines:
h = uicontrol(hfig, "Style", "checkbox", "String", "Long", "Units", "Normalize", "Tag", "chkBox1")
h = uicontrol(hfig, Style="checkbox", String="Long", Units="Normalize", Tag="chkBox1")
Here's another side-by-side comparison of the two syntaxes. See the attached mlx file for the full code and all content of this Community Highlight.
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
