IoTGateway/CoAP-like

Advantech CoAP-like Packet Structure

CoAP-like Packet Format

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 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