Revision as of 04:39, 8 March 2016

Advantech CoAP-like Packet Structure

CoAP-like Packet Format

CoAP-like Header

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 Smart Object ID