Android NDEF Push Protocol Specification
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2014-02-24
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Android NDEF Push Protocol Specification
Version 1
2011-02-22
Table of Contents
1. Revision History
2. Overview
3. Data Format
3.1. Protocol Versions
3.2. Header
3.3. NDEF Entry
3.4. Action Codes
3.5. Server
3.6. Client
1. Revision History
Version Date Description
1 2011-02-22 Initial revision.
2. Overview
The NDEF Push Protocol (NPP) is a simple protocol built on top of LLCP which is designed to push an NDEF message from one device to another.
The procedure itself is one way and defines pushing NDEF messages from a client to a server. A device that supports NPP MUST always run an NPP
server, and MAY run the NPP client procedure when it has an NDEF message available to push. This allows for bi-directional NDEF exchange
between NPP devices.
3. Data Format
3.1. Protocol Versions
The protocol has major and minor versions. A change in the major version is not forwards compatible with older clients where a change in the minor
version must be compatible with all clients using the same major version. A change in the minor version will signal new action codes. Servers must
ignore unknown action codes they receive.
3.2. Header
The data sent from the client to the server MUST start with the following header:
Byte Description Expected Value
0 Protocol version
Most significant 4 bits are the major version.
Least significant 4 bits are the minor version.
This specification defines major version 0x0,
minor version 0x1, for a value of 0x01.
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