‰  NOW 40 WPM  ‰  
NUMBER OF ITS CREATION, BUT YOU MAY RENAME PAGES TO SOMETHING MORE
MEANINGFUL.  THE OTHER CONTROLS AT THE TOP OF THE PAGE PANE LET YOU DELETE,
INSERT, REORDER, COPY, IMPORT/EXPORT, AND DELETE ALL THE PAGES AT ONCE.
AFTER YOU HAVE CREATED A PAGE, CLICK ON IT IN ORDER TO VIEW IT IN THE
DISPLAY PANE AND BEGIN WORKING WITH CONTROLS.  AFTER POPULATING YOUR PAGES
WITH CONTROLS, YOU CAN COMPILE AND TEST YOUR DESIGN RIGHT IN THE EDITOR.
GRANTED, IT KNOWS NOTHING OF INPUT FROM 
USING A NEXTION DISPLAY TO UPDATE A CLASSIC KEYER RICK DUBBS, WW9JD  KIT
BUILDING IS ONE OF MY FAVORITE HAM RADIO ACTIVITIES.  IN 1984, I PURCHASED
THE HEATHKIT SA5010 UMATIC MEMORY KEYER.  ITS PICTURED IN THE SPLASH SCREEN
OF MY UPDATED KEYER IN THE LEAD PHOTO.  THE UMATIC HAD A HUGE 240 CHARACTER
COMMAND MEMORY AND A 22 KEY MEMBRANE KEYPAD.  IT COULD USE UP TO 10
VARIABLE LENGTH MEMORIES AND GENERATED REPEATABLE RANDOM CW FOR CODE
PRACTICE.  ITS MAIN FLAW WAS ITS CAPACITIVE TOUCH PADDLES, WHICH SEEMINGLY
WORKED WELL FOR ONLY A FEW HAMS.  IVE BEEN WANTING TO BUILD AN UPDATED
KEYER WITH MORE MEMORY, A PHYSICAL IAMBIC PADDLE, AND A TOUCH SENSITIVE LCD
SCREEN.  I RECENTLY FOUND THE NEXTION NX4832K035 ENHANCED 3R5 INCH HMI
TOUCH DISPLAY LCD MODULE AVAILABLE FROM NEXTION.  TECH.  IT CONNECTS TO AN
ARDUINO OR RASPBERRY PI WITH JUST A PAIR OF SERIAL WIRES, AND PROVIDES A
USER INTERFACE UI DESIGN ENVIRONMENT THAT IS INDEPENDENT FROM THE MAIN
PROGRAM CODE KNOWN AS THE ARDUINO SKETCH.  THIS WAS THE BASIS FOR MY KEYER.
FIGURE 1 SHOWS MY UPDATED UMATIC2 KEYER, WITH PADDLES ATTACHED, NEXT TO THE
UMATIC KEYER WITH ITS CAPACITIVE PADDLES.  THE ORIGINAL UMATIC KEYER HAD 10
MEMORIES.  MY UPDATED VERSION HAS 110 MEMORIES.  THE NEXTION DISPLAY CAN
HAVE AS MANY AS 256 CONTROLS ON EACH SCREEN, AND AS MANY AS 256 SCREENS.
THE PROJECT DOESNT NEED TO HAVE A LARGE ENCLOSURE TO ACCOMODATE BUTTONS,
SWITCHES, DIALS, AND DISPLAYS.  THE SINGLE NEXTION DISPLAY TOUCHSCREEN WILL
SUFFICE SEE FIGURE 2.  NEXTION EDITOR  USE THE NEXTION EDITOR SOFTWARE TO
CREATE THE DIFFERENT SCREENS, OR PAGES, AND POPULATE THEM WITH CONTROLS.
THE DISPLAY HAS THE ABILITY TO MOVE BETWEEN THE DIFFERENT PAGES ON ITS OWN,
OR THE PAGES CAN BE SELECTED UNDER ARDUINO SKETCH CONTROL.  THE SAME GOES
FOR THE CONTROLS THEMSELVES.  THEY CAN GET OR SEND THEIR INFORMATION FROM
OR TO THE SKETCH.  IF THE SEND COMPONENT ID BOX IS CHECKED FOR A PARTICULAR
CONTROLS ACTION LIKE TOUCH PRESS OR TOUCH RELEASE, THEN YOUR SKETCH WILL BE
ABLE TO MAKE USE OF THAT EVENT TO PERFORM SOME SKETCH FUNCTION.  IVE ALSO
CREATED A PAGE TO ENABLE SEVERAL PAGES FOR REFERENCE INFORMATION.  THERES A
PAGE WITH Q SIGNALS, A PAGE WITH A US CALL AREAS MAP, AND SOME PAGES WITH
KEYER INSTRUCTIONS.  BUILDING NEXTION PAGES  THE NEXTION EDITOR IS MADE UP
OF MULTIPLE PANES SEE FIGURE 3.  START BY CLICKING ON THE NEW ICON OR FILE
NEW ON THE QUICK ACCESS BAR.  GIVE YOUR PROJECT A NAME, SELECT WHICH MODEL
YOURE USING, AND CHOOSE THE DIRECTION IN WHICH THE DISPLAY WILL BE
ORIENTED.  I RECOMMEND YOU START WITH THE PANE IN THE LOWER LEFT HAND SIDE.
‰  END OF 40 WPM TEXT  ‰  QST DE W1AW  ƒ