Message Format & Structure

Every exchange with the DynaFlex II PED — 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 Dyna-family readers and is documented once in the shared reference.

Applies to: DynaFlex II PED

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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