Hi
I hope this is the right forum… also please, my english is not sooo good, greetings from germany!
I bought the Arduino Uno once, for playing with floppy drives 
Now I connected it to a 16x2 LCD, this works, using the predefined script and played with it.
Actually it is only a playing with it, doing some stupid things, possible the result will be a nice gimmick in my car.
What I want to do ist, to build the Arduino with the LCD in my car’s dashboard and sow some informations, displaying short messages by using counter and input lines.
but, i am a c64 kid … have no idea of this programming language and i run to the wall by trying changing / writing the script.
So I hope, you please can help me …
My plan:
When ignition switch turns to the first position (“Radio/Stereo”) or more nice by unlock central door, the Arduino gets power and boots and displaying a “welcome message”
- here I need no input line, just boot up and display, then waiting for input -
When switching to “ignition position” I want to display first a message for x seconds, then continue some things like,
Countdown (i found out to rewrite the counter, but at zero I need a IF line, and have not idea how to stop the counter getting in negative / large numbers)
Info: “Alternator!” (after motor runs, display message “Alt. ok” (in German “LiMa OK!”) (getting here a signal with an IR receifer LED)
Info: “Handbrake” , “R-gear”, “Water” and a lot other things with different priority
As I wrote, just actualy only playing, when finish, some really better ideas for displaying messages.
And, speedo and rpm.
So this is my code I rewrote:
// include the library code:
#include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.setCursor(0, 0);
lcd.print(" RENAULT MEGANE");
lcd.setCursor(0, 1);
lcd.print("System bereit");
}
void loop() {
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(14, 1);
// print the number of seconds since reset:
lcd.print(60-(millis()/1000));
}
As you can see, I did not really come forward. Only message and counter.
I also searched the web for speedo and rpm displaying, but each script only display one of these things, I need a point where I can adjust the speedy and rpm if neccesary (when in the car, using USB cable to laptop, sending new listing into the Arduino)
I was not able to get these scripts together
a huge project sure…
Is it still possible what I want to do, as the memory is not very large, can the Arduino handle all these options?
Back to my script in (code)
The counter works, counting from 60 to … negative number.
How can I make a IF loop to get at “zero” to stop it, doing an action (output or displaying other message)?
I cant get the lcd.print to get IF=0 or IF<1 then set a THEN or ELSE …
Here I need a complete getting knowledge of all these things ;(
thanks in advance, hope my english is not tooo bad
