最終更新:2023-02-28 (火) 09:08:00 (686d)

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LMP supports requests for the version of the LM protocol.
- The LMP_VERSION_REQ? and LMP_VERSION_RES? PDUs contain three parameters: Version, Company_Identifier and Subversion.
Version specifies the version of the Bluetooth LMP specification that the device supports.
All companies that create a unique implementation of the LM shall have their own Company_Identifier.
The same company is also responsible for the administration and maintenance of the Subversion.
It is recommended that each company has a unique Subversion for each RF/BB/LM implementation.
For a given Version and Company_Identifier, the values of the Subversion shall increase each time a new implementation is released.
For both Company_Identifier and Subversion the value 0xFFFF means that no valid number applies.
There is no ability to negotiate the version of the LMP.
LMP version can be requested at anytime following a successful Baseband Paging procedure.

A given value for Version does not indicate that the device supports all the features in the corresponding version of the specification; the relevant feature bits (see Section 4.3.4) should be checked instead.