' v3.12 30-NOV-2023  This software with PMK-OLED Shield 1 OLED+GPS added 
' Keyer attributes (speed, normal/rev, mode A/B) are displayed.
' The current GPS date and time are also displayed whenever
' users simultaneously press the RPT and DECR buttons.
' GPS card must be used for these functions to be
' present and working. (If the "GPS display" button sequence
' is pressed before satellite sync is achieved, as denoted by the
' 1 pps blinking LED on the GPS card, the program will hang while
' waiting for this condition ... hence the design was made this
' way for placing "get GPS info" under operator control.)