IoTGateway/CoAP-like
From ESS-WIKI
Contents
Advantech CoAP-like Packet Structure
CoAP-like Packet Format
Header Size: 8 Bytes
Payload Size: 0 ~ 70 (Max) Bytes
CoAP-like Header
| Name | Size ( bits ) |
|---|---|
| Ver | 2 |
| Type (T) | 2 |
| TKL: Token Length | 4 |
| Code | 8 |
| Message ID | 16 |
| Length | 32 |
Type (T) : 2-bit unsigned integer Transaction Type field. Indicates if this message is
- Confirmable (0): Some messages require an acknowledgment
- Non-Confirmable (1): Some other messages do not require an acknowledgment
- Acknowledgment (2): An Acknowledgment message acknowledges that a specific Confirmable message (identified by its Transaction ID) arrived
- Reset (3): A Reset message indicates that a specific Confirmable message was received, but some context is missing to properly process it. This condition is usually caused when
- the receiving node has rebooted and has forgotten some state that would be required to interpret the message
Code : : 8-bit unsigned integer
Request
- GET(0.01): 1
- PUT(0.03): 3
Response
- Change(2.04): 68
- Content(2.05): 69
- Bad Request(4.00): 128
- Unauthorized(4.01): 129
- Not Found(4.04): 132
- Method Not Allowed(4.05): 133
- Not Implemented(5.01): 161
IPSO for CoAP-like
IPSO RESTful API Rule: /{Object ID}/{Object Instance}/{Resource ID}/
IPSO Smart Object ID
| Sensor | Object ID |
|---|---|
| Temperature | 3303 |
| Humidity | 3304 |
| Magnetic | 3314 |
| Accelerometer | 3313 |
| Light Sensor | 3301 |
| Digital Output | 3201 |
| Digital Input | 3200 |
| CO2 | 9001 |
| CO | 9002 |
| Ultrasonic | 9200 |
IPSO Smart Resource ID
| Resource | Object ID |
|---|---|
| DI Status | 5500 |
| DO Status | 5550 |
| Min Range Value | 5603 |
| Max Range Value | 5604 |
| Sensor Value | 5700 |
| Sensor Units | 5701 |
| X Value | 5702 |
| Y Value | 5703 |
| Z Value | 5704 |
| Compass Direction | 5705 |
CoAP-like Command
| Group | Description |
|---|---|
| /dev/info | Information of Sensor Hub |
| /net/info | Information of Net Communication |
| /net/status | Status of Network |
| /sen/info | Information of Sensor |
| /sen/status | Status of Sensors |
| Key | Value | Description | Group | Example |
|---|---|---|---|---|
| action | list | List detail information | /sen/info, /dev/info, /net/info | GET /sen/info?action=list |
| action | observe | Observe status | /sen/status, /net/status | GET /sen/status?action=observe&id=all |
| action | cancel | Cancel observe | /sen/status, /net/status | GET /sen/status?action=cancel&id=all |
| field | id | List all sensor id | /sen/info | GET /sen/info?action=list&field=id |
| field | health | Network health status | /net/status | GET /net/status?field=health |
| id | all | Get all sensor’s data | /sen/info, /sen/status | GET /sen/status?action=observe&id=all |
| id | 0,1,2,3... | Get one of sensor data | /sen/info, /sen/status | GET /sen/status?action=observe&id=0,1 |