How to connect to QIoT Suite Lite using CoAP? @ 觀察筆記

In this tutorial, you will learn how to connect to QIoT Suite Lite using CoAP.

Refer to the following tutorial to learn how to connect different development boards to QIoT Suite Lite: https://www.qnap.com/en/how-to/tutorial/qiot-suite-lite

Refer to the following link to learn how to establish IoT Application and Things: https://www.qnap.com/en/how-to/tutorial/article/how-to-show-dht11-data-on-qiot-dashboard

You can also consult the QNAP GitHub at https://github.com/qnap-dev/qnap-qiot-sdks

Open IoT Applications to get CoAP settings

Open your IoT Applications and go to your Things.

Click the "Connect a Device" button.

Choose "CoAP" and click "Next".

Click "Download JSON file". The name of the file will be "resourceinfo.json".

* More information about "resourceinfo.json"
The following is example code from resourceinfo.json:

 {

 "myqnapcloudHost": "Not Available",

 "clientId": "rpi2_1508915341",

 "host": [

 "172.17.28.73"

 ],

 "r": "c08b5979-1f8f-42da-9085-d761707be65c",

 "t": "r:e91d53d57729b9d0b59772f9f2a130dc",

 "port": 25683,

 "resources": [

 {

 "description": "",

 "datatype": "Float",

 "resourceid": "temp",

 "topic": "r/qiot/things/admin/rpi2/temp",

 "resourcename": "temp",

 "resourcetypename": "Temperature",

 "unit": "°C"

 }

 ]

 }

Reference:
1. "myqnapcloudHost": If you connect the myqnapcloud DDNS services on your NAS and it will provide a Internet hostname that can connect to QIoT Suite Lite. If your encounter issues with ports, then refer the following article: https://qiot.qnap.com/blog/en/2017/09/21/solve-problem-using-different-port-qiot-suite-lite-v1-0-41/
2. "clientId": Devices identifiers.
3. "host": The NAS IP
4. "r" & "d": The query format of CoAP is "r=<r>&t=<t>"
5. "port": The CoAP port.
6. "resources": Information of resource, including the following:
  - description: QIoT resource description
  - datatype: QIoT resource data types
  - resourceid: QIoT resource identifiers
  - topic: CoAP’s path for sending and receiving. The URL format is "coap://<host>:<port>/<topic>?r=<r>&t=<t>"
  - resourcename: QIoT resource names.
  - resourcetypename: QIoT resource type names.
  - unit: QIoT resource units.

Type of Connection:

"Publish":
1. method: PUT
2. pathname: <topic>
3. query: r=<r>&t=<t>
4. payload: {"value" : <data>}
"Receive":
1. method: GET
2. pathname: <topic>
3. query: r=<r>&t=<t>
4. payload: {"value" : <data>}

Using the above example, you would get the following "URL" link:
" coap://172.17.28.73:25683/r/qiot/things/admin/rpi2/temp?r=c08b5979-1f8f-42da-9085-d761707be65c&t=r:e91d53d57729b9d0b59772f9f2a130dc"