Results for

Haydar Jawad
Haydar Jawad
Last activity on 2 Nov 2023

MQTT API is not in my profile

Hi, i wonder if any one experiencing the same, but in my thing sepak profiel i can only see : 1- User API Key 2- Alert API Key

but no MQTT API key? not sure why Thank you

Hi,

I get 200 after a Python post to a channel like this from my Python script:

Ambient light: 13.3 lux Mass is 943.6 g 10:37 that is today, 7/24/2021 Pacific time <Response [200]

Yet the data is not showing up in the widget after 03:07 today and when I export the data it agrees with that:

2021-07-24 02:57:17 MDT 4123 947.4597598 0.833333333

2021-07-24 03:07:18 MDT 4124 947.5867868 0.833333333

here is a code snippet: note it posts every 10 minutes

-----------

request_headers = {'Content-Type':'application/json'}
          try:
             response = requests.post('http://api.thingspeak.com/update?api_key=' + API_KEY,
             json=planta_json, headers=request_headers)
             print(response)
          except:
             print("did not post for some reason")

------------

i never get a "did not post for some reason" debug message from the Python script. its like the data just disappears for some reason.

is there something else in the response i should look at to see why this happens? it will work fine for days then do this.

thanks

I have Thingspeak MATLAB visualizations that I call using https://thingspeak.com/apps/matlab_visualizations/nnnnn?width=800&height=700 (where nnnnn is the visualization number). In the MATLAB code, is it possible to determine the width and height parameters that were sent, in this case 800 and 700?

Thanks! Tom

Hello Thingspeak supporter,

I see that the pleaform had updated the MQTT device feature. But I get the issue related to subscribe channel, please check my descripton below:

A Thingspeak device is added with permission of publish and subscribe to a channel. But when starting subscribe, the server disconnected MQTT connection to the device. I'm using MQTTbox tool for testing.

  • MQTT setting ID, username and password (As thingspeak device info)
  • Connect and publish OK
  • MQTT is disconnected when starting subscibe

This issue doesn't appear when I use my old thingpseak account (before adding MQTT device feadure).

Please help me to check. Thank you!

For example, I can send my latest Thingspeak data to firebase platform? Or I can update my Thingspeak field data from Firebase?

Martin Lorenzo
Martin Lorenzo
Last activity on 12 Jul 2021

¿Wrong messages usage?

Hello. First of all sorry for my English. I was checking that my daily message usage is about 1400/1500 and suddenly yesterday climbed to 13000. Any thoughts? Thanks in advance. Martín.-

generateFunction() failed in MathLab analysis and MathLab vis. where can i put generated function in the Apps->MathLab analysis list?

matlabdrive can show ans =

    '/MATLAB Drive'
in MathLab online and ThinkSpeak MathLab Analysis .
but show 
Unable to create file.

No one have saved once in MathLab online or ThinkSpeak MathLab Analysis ?

Hello to each other, I'm new here and wanted to test how it works with the transfer of data. To do this, I registered with ThingSpeak. I entered the API code in a Python script (see screenshot). Unfortunately, I always get the message: Response 400. When I enter the web address directly in the browser, I get a "0" back. I can't see an error entering the API key. Can you help me? I use a Raspberry 4B with the PIR sensor HC-SR501. The program will later run on a Raspberry Zero. Have a nice weekend everyone.

Russell Sher
Russell Sher
Last activity on 8 Jul 2021

Channel data time limit?

Hi - I noticed that after what seems like 12 hours or less, Thingspeak restarts my graph and old values are not displayed. I read about sample limits. Also a mention of a time limit here: https://community.thingspeak.com/forum/general/chart-view-limited-to-2-hours/ Is this the case? (I can of course reduce my update time.

Thanks

Russell

Hi. simple question: im getting a 401 error when I try to delete data in a channel yet if i just change 'requests.get(...)' to 'requests.delete(...) i get a 401 error. what am i doing wrong? thanks

Hallo,

bei THINKSPEAK werden auf dem Handy max 60 Werte angezeigt.

Bei 1 Wert pro Stunde sieht man also 2,5 Tage.

Ich würde lieber 1 Wert pro Tag senden und damit 60 Tage im Überblick haben.

Gibt es dafür eine Lösung ?

Danke & MfG 

Peter Benger 

Hi all, The ThingSpeak API provides the possibility to embed the chart with historical values of a channel in a web page. Now I would also like to show the last value of a channel as a number on this page. I looked into some of the answers. But I could not understand. Can someone please share the JavaScript code OR the HTML code? I am new to ThingSpeak and Web Development. Please help me out!!

Thank you, Prajna Bhat

I'm accessing internet on my Arduino uno using esp-01, is there a thingspeak Library i can use on this to send data to my thingspeak channel.

Hello,

Anyone could help me to write data to a channel using micropython on ESP8266 or ESP32? I found nothing update on forums (Thingspeak, Micropython, web...)

Thanks a lot

#include WiFi.h #include "secrets.h" #include "ThingSpeak.h" #include hcsr04.h // connect to wifi char ssid[] = "long2000"; // your network SSID (name) char pass[] = "88888888"; // your network passwword int keyIndex = 0; // your network key Index number (needed only for WEP) WiFiClient client; unsigned long myChannelNumber = 1434038; const char * myWriteAPIKey = "1SXFRPC5DG3FMDM0"; const char * server = "api.thingspeak.com"; unsigned long duration; //time variable

// setup HC-SR04 #define HC-SR04

const int trig = 18; const int echo = 19; void setup() {

Serial.begin(9600); // communicate Serial to baudrate 9600   
pinMode(trig,OUTPUT);   
pinMode(echo,INPUT);  
while (!Serial) 
 // đợi cổng nối tiếp kết nối. Chỉ cần cho cổng USB gốc Leonardo 
WiFi.mode(WIFI_STA);   
ThingSpeak.begin(client);  // Initialize ThingSpeak

} void loop() { float Distance; //distance variable // Connect or reconnect to WiFi if(WiFi.status() != WL_CONNECTED){ Serial.print("Attempting to connect to SSID: "); Serial.println(SECRET_SSID); while(WiFi.status() != WL_CONNECTED){ WiFi.begin(ssid, pass); // Connect to WPA/WPA2 network. Change this line if using open or WEP network

    digitalWrite(trig,0);   
    delayMicroseconds(2);   
    digitalWrite(trig,1);   
    delayMicroseconds(5);   
    digitalWrite(trig,0);   
    duration = pulseIn(echo,HIGH);   
       Distance = (duration/2/29.412); 
     Serial.print(Distance);
    Serial.println("cm");
    delay(2000);    
    // Write to ThingSpeak. There are up to 8 fields in a channel, allowing you to store up to 8 different
  // pieces of information in a channel.  Here, we write to field 1.
  int x = ThingSpeak.writeField(myChannelNumber, 1, Distance, myWriteAPIKey);
    } 
 delay(2000);
 }
}

I'm new and I'm doing work for college and I'm having a hard time doing this part, I can send the data to thingspeak, but I don't know how to get for example the status of field 1 and check if it is 1 or 0 , I want to do this so that later using esp32 I can turn on a real led, could someone please help me

here is my code, i want to recive an email notification when my "alerta" field increase.

   % Read the soil moisture channel data from the past two weeks.
  % Send an email and tell the user to add water if the value
  % is in the lowest 10 %.
  % Store the channel ID for the moisture sensor channel.
  channelID = 1425554;
  % Provide the ThingSpeak alerts API key.  All alerts API keys start with TAK.
  alertApiKey = 'TXXXXXXXXXXXX';
  % Set the address for the HTTTP call
  alertUrl="https://api.thingspeak.com/alerts/send";
  % webwrite uses weboptions to add required headers.  Alerts needs a ThingSpeak-Alerts-API-Key header.
  options = weboptions("HeaderFields", ["ThingSpeak-Alerts-API-Key", alertApiKey]);
  % Set the email subject.
  alertSubject = sprintf("Alertas");
  % Read the recent data.
  Alerta = thingSpeakRead(channelID,'NumDays',30,'Fields',8);
      % Get the most recent point in the array of moisture data.
      lastValue = Alerta(end); 
      % Set the outgoing message
      if (lastValue<=Alerta)
         alertBody='alerta de anomalia de fluxo de agua';    
      end
   % Catch errors so the MATLAB code does not disable a TimeControl if it fails
  try
      webwrite(alertUrl, "body", alertBody , "subject", alertSubject, options);
  catch someException
      fprintf("Failed to send alert: %s\n", someException.message);
  end
Usta Sasmita
Usta Sasmita
Last activity on 2 Jul 2021

size of Export recent data

How much storage limit or maximal storage thingspeak? and how much size (byte) per fields?

Hi. I am a begginer.

I did a sample "Calculate high and low temperatures" with matlab analysis. I want to write data in a specified field in the new channel. I do not know how to do that. I already replace the empty spaces with channel ID and Api key. Then, when i try to set the field that i want to, it returns an error.

Is it right doing like I mention here:

thingSpeakWrite(writeChannelID,'Fields',[2],maxTempF,'timestamp',timeMaxTemp,'WriteKey',writeAPIKey);