CalAmp FOB10-BL, Hardware And Installation Manual, Page: 10 / 28

Build Process ................................................................................................................................. 27
Keyfob ........................................................................................................................................... 27
BTCS .............................................................................................................................................. 27
LMU ............................................................................................................................................... 27
Key Fob button pushes
Button state machine ignoring debouncing
Warning: Any key press event with time interval shorter than 1s is not going to be reliably received
by LMU FOB module when LMU BT driver is operating in Scan advert mode.
The state diagram below will only work if the KeyFob is connected to BTDB.
button state coded as 2 bits
Not pressed 00
Pre-short press 01
Short Press 10
Long Press 11
The three buttons are bit coded into a single button state byte 0 0 b3 b3 b2 b2 b1 b1
Not
Pressed
Pre-short
press
Short Press Long Press
timeout MinSP
Tx ShortPress
timeout repeat SP
Tx Shortpress
timeout LP
Tx longpress
timeout repeat LP
Tx Longpress
Button push
Button release
Tx Not pressed Button release
Tx Not pressed