ThingSpeak
Hans-Petter Halvorsen http://halvorsen.blog
ThingSpeaks
• ThingSpeak is a Web Service (REST API) that lets you collect and
store sensor data in the cloud and develop Internet of Things
applications.
• It works with Arduino, Raspberry Pi and MATLAB (premade
libraries and APIs exists).
• But it should work with all kind of Programming Languages, since
it uses a REST API and HTTP.
https://thingspeak.com
* ThingSpeak is free for small non-commercial projects 2
ThingSpeak
https://thingspeak.com
ThingSpeak
• ThingSpeak is an IoT analytics platform service that lets you
collect and store sensor data in the cloud and develop Internet of
Things applications.
• The ThingSpeak service also lets you perform online analysis and
act on your data. Sensor data can be sent to ThingSpeak from any
hardware that can communicate using a REST API
• ThingSpeak is a Web Service (REST API) that lets you collect and
store sensor data in the cloud and develop Internet of Things
applications.
https://thingspeak.com
* ThingSpeak is free for small non-commercial projects 4
What is ThingSpeak?
https://se.mathworks.com/videos/introduction-to-thingspeak-107749.html
ThingSpeak + LabVIEW
Hans-Petter Halvorsen http://halvorsen.blog
ThingSpeak + LabVIEW
LabVIEW www.ThingSpeak.com
The Cloud
Configuration and Settings
SubVI
ThingSpeak
+ Web Browser
Hans-Petter Halvorsen http://halvorsen.blog
ThingSpeak + Web Browser
• We can use a standard Web Browser in order to put data to
ThingSpeak or to get data from ThingSpeak
Write Data Example:
https://api.thingspeak.com/update?api_key=<WriteKey>&field3=2
Read Data Example:
https://api.thingspeak.com/channels/<ChannelId>/fields/3/last.jso
n?key=<ReadKey>
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Set and Read Values using a Web Browser
Set Kp Remotely Example:
Enter the following in a Web Browser (or from a Programming Language like LabVIEW,
MATLAB, etc)
We set Kp=2
https://api.thingspeak.com/update?api_key=<WriteKey>&field3=2
Read Kp Remotely Example:
https://api.thingspeak.com/channels/<ChannelId>/fields/3/last.json?key=<ReadKey>
Response in Browser: {"created_at":"2017-06-26T07:41:54Z","entry_id":1270,"field3":"2"}
We read Kp=2
ThingSpeak + MATLAB
Hans-Petter Halvorsen http://halvorsen.blog
ThingSpeak + MATLAB
The “ThingSpeak Support Toolbox” lets you use desktop MATLAB
to analyze and visualize data stored on ThingSpeak.com
ThingSpeak Support from Desktop MATLAB:
http://se.mathworks.com/hardware-support/thingspeak.html
ThingSpeak + Arduino
Hans-Petter Halvorsen http://halvorsen.blog
ThingSpeak + Arduino
Arduino Example:
https://www.arduino.cc/en/Tutorial.WiFi101ThingSpeakDataUploader
21
Arduino WiFi Shield + ThingSpeak
• ThingSpeak is a Web Service (REST API) that lets you collect and
store sensor data in the cloud and develop Internet of Things
applications.
• It works with Arduino, Raspberry Pi, MATLAB and LabVIEW, etc.
https://thingspeak.com
Arduino Example:
https://www.arduino.cc/en/Tutorial.WiFi101ThingSpeakDataUploader
Data Collection
www.ThingSpeak.com
The Cloud Data Analysis
Arduino + Wi-Fi Shield
ThingSpeak + C#
Hans-Petter Halvorsen http://halvorsen.blog
ThingSpeak + Visual Studio/C#
Visual Studio www.ThingSpeak.com
C# The Cloud
Configuration and Settings
void SaveMeasurementData()
{
string apiKey;
double tagValue;
string server = "https://api.thingspeak.com/";
string webMethod;
string uri;
var webclient = new WebClient();
apiKey = “xxxxxxxxxxxxxxxxxxxxx";
tagValue = Convert.ToDouble(txtMeasurementValue.Text);
webMethod = "update?api_key=" + apiKey + "&field1=" + tagValue;
uri = server + webMethod;
webclient.UploadString(uri, "POST", "");
}
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Hans-Petter Halvorsen
University of Southeast Norway
www.usn.no
E-mail: hans.p.halvorsen@usn.no
Web: http://www.halvorsen.blog
