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George
George
Last activity on 18 Dec 2022

Location history and current location

Hi there,
I am attempting to obtain a location history (thus the location of each of the previous messages recived) and the current location of my device on Thingspeak. I have not found any examples of how to do this on Thingspeak. Please may someone guide me or advise me on how to do this.
Thank you
Hi there, I have been attempting to try and access the loaction of my device using the following code:
myChannel=*******;
ReadAPIKey='xxxxxxxxxxxx';
myData=thingSpeakRead(myChannel,'ReadKey', ReadAPIKey,'numpoints',100,'outputformat','timetable','location',1);
myVector=(myData.Latitude).^2+(myData.Longitude).^2+myData.Altitude.^2;
maxVector=max(myData.Latitude)^2+max(myData.Longitude)^2+max(myData.Altitude)^2;
myVector=myVector/maxVector;
myMap=geoscatter(myData.lat,myData.long,15,myVector,'filled');
geobasemap('satellite');
colormap jet;
I have about 100 entry points at this stage. However, i get the following error:
Error using .
Unrecognized table variable name 'lat'.
Error in Custom (no starter code) 2 (line 7)
myMap=geoscatter(myData.lat,myData.long,15,myVector,'filled');
I am attempting to access the location of a moving device. Meaning, the longitude and latitude values will be constantly changing, thus, I do not want to set my latitude or longitude value as a constant but i want it to keep on updating as my device moves around. How would I do this? How would I ammend this error without setting the "lat" or "long" as a consant before hand?
Further, my device should be constantly sending messages, this, the number of entries to which it will see the location of will be contantly changing. How can I thus not set the entry points as a specific value but rather have it update as my device sends messags?
Is there an easier or better way to do this?
Thanks
Hi there, I am trying to reach out to anyone who has successfully completed the project of building a weather station using an Arduino MKRFOX1200 board, a dht11 sensor across the Sigfox and Thingspeak networks. I’ve been attempting to build the weather station over the SigFox and things.io network for over a year now but I was unsuccessful. I then found this tutorial on how to build this using Thingspeak: https://create.arduino.cc/projecthub/masteruan/arduino-mkr-fox-1200-sigfox-meteo-station-423609 . I have now been attempting to build it using this network but am still unsuccessful.
My SigFox and arduino is working. I made the arduino code convert temperature to Celsius (rather than Kelvin which is what the tutorial does). However, I am unable to access the location of the device on Thingspeak (my SigFox atlas is activated) and I am getting humidity values of approximately -30k. Please may someone assist me or give me a detailed approach on how to fix these issues. My goal is to have my thingspeak like this: https://thingspeak.com/channels/227248. I have followed the tutorial and projecthub but I cannot figure out why I am obtaining a confusing humidity reading. Please please may someone help.
Thank you so much for your time.

Kindly assist I have been trying to create a small weather station with with DHT11 sensor and CC3200 launchpad and connect it to ThingSpeak but the code won't compile as I am using an Arduino code.

Anyone to please help

    if true
      #include <SPI.h>
      #include <WiFi.h>
      #include <WiFiClient.h>
      #include <DHT.h>  // Including library for dht
      String apiKey = "";     //  Enter your Write API key from ThingSpeak
      const char *ssid =  "Virus";     // replace with your wifi ssid and wpa2 key
      const char *pass =  "";
      const char* server = "api.thingspeak.com";
      #define DHTPIN 11          //pin where the dht11 is connected
      #define DHT dht(DHTPIN, DHT11);
      WiFiClient client;
      void setup() 
      {
         Serial.begin(115200);
         delay(10);
         dht.begin();
         Serial.println("Connecting to ");
         Serial.println(ssid);
         WiFi.begin(ssid, pass);
        while (WiFi.status() != WL_CONNECTED) 
        {
              delay(500);
              Serial.print(".");
        }
        Serial.println("");
        Serial.println("WiFi connected");
      }
      void loop() 
      {
        float h = dht.readHumidity();
        float t = dht.readTemperature();
                if (isnan(h) || isnan(t)) 
                   {
                       Serial.println("Failed to read from DHT sensor!");
                        return;
                   }
                           if (client.connect(server,80))   //   "184.106.153.149" or api.thingspeak.com
                        {  
                               String postStr = apiKey;
                               postStr +="&field1=";
                               postStr += String(t);
                               postStr +="&field2=";
                               postStr += String(h);
                               postStr += "\r\n\r\n";
                               client.print("POST /update HTTP/1.1\n");
                               client.print("Host: api.thingspeak.com\n");
                               client.print("Connection: close\n");
                               client.print("X-THINGSPEAKAPIKEY: "+apiKey+"\n");
                               client.print("Content-Type: application/x-www-form-urlencoded\n");
                               client.print("Content-Length: ");
                               client.print(postStr.length());
                               client.print("\n\n");
                               client.print(postStr);
                               Serial.print("Temperature: ");
                               Serial.print(t);
                               Serial.print(" degrees Celcius, Humidity: ");
                               Serial.print(h);
                               Serial.println("%. Send to Thingspeak.");
                          }
            client.stop();
            Serial.println("Waiting...");
        // thingspeak needs minimum 15 sec delay between updates
        delay(1000);
      }
    end