Some steering wheel control button use common Up Button Message.
You can use this option for the buttons to have common Up Button Message.

Example:
Idle Message is
Dur: 0 Len: 2 ID:0500 Data:AB CD
Down Button Message is
Dur: 0 Len: 4 ID:0683 Data:04 00 20 0D
Check on Use Idle Message as Up Message

When the button is pressed and released, the messages are sent to the radio though BSGc like below.

Len: 4 ID:0683 Data:04 00 20 0D
Len: 2 ID:0500 Data:AB CD
Len: 4 ID:0683 Data:04 00 20 0D
Len: 2 ID:0500 Data:AB CD
….

 

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