Bluetooth has developed over the years with various major and minor changes. Very large changes have resulted in new version numbers, such as when version 3 was replaced by version 4 which includes new low power support. Smaller changes have resulted in an increase to the number after the decimal place, such as the release of Bluetooth 4.2, replacing 4.1.

LMP stands for Link Manager Protocol and it's a protocol layer used in Bluetooth communication that handles the management and control of connections between Bluetooth devices. It's responsible for key functions such as:

• Establishing and terminating connections between devices.
• Authentication and encryption for secure communication.
• Managing power states and controlling device power modes to save battery.
• Negotiating features like supported data rates and connection parameters.
• LMP operates at the lower layers of the Bluetooth protocol stack and interacts directly with the baseband to manage the physical link between devices. It's essential for setting up and maintaining the connection, ensuring that the devices can communicate effectively.

You may need to know how to translate between the marketed version numbers of Bluetooth and their LMP version numbers because sometimes computers only display the LMP version supported by your computer, not the marketed version of Bluetooth.

LMP	Bluetooth Version
0	Bluetooth 1.0b
1	Bluetooth 1.1
2	Bluetooth 1.2
3	Bluetooth 2.0 + EDR
4	Bluetooth 2.1 + EDR
5	Bluetooth 3.0 + HS
6	Bluetooth 4.0
7	Bluetooth 4.1
8	Bluetooth 4.2
9	Bluetooth 5
10	Bluetooth 5.1
11	Bluetooth 5.2
12	Bluetooth 5.3
13	Bluetooth 5.4
14	Bluetooth 6.0
15	Bluetooth 6.1
16	Bluetooth 6.2
17	Bluetooth 6.3