Message Format & Structure

Every exchange with the DynaFlex II Go— the commands you send and the responses and notifications it returns — uses the standard Multi-Interface Card Reader Platform (MMS) message format. This section defines how requests, responses, notifications, and file messages are framed and parsed. The format is the same across DynaFamily readers and is documented once in the shared reference.

Applies to: DynaFlex II Go

Settings & Information - Group 0xD1nn

Reference Section	Information Available
About Messages	The host and the device communicate with each other by exchanging blocks of data called Messages, which are standardized wrappers containing a payload that is either a command Request, a command Response, an unsolicited Notification, or a File.
Message Format	All messages exchanged between the host and the device are formatted using the tag-length-value Distinguished Encoding Rules (DER).
Message Structure	Each message type follows a specific structure described on this page.

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