I have an lcd with button coded for sequential numbers when pressed. What I want, is for a press of the button to give me a number. Specifically like this: (press = "1"), (press = "1"), (press = "2"), (press = "3"), (press = "5"), (press = "8"), then reset to "1". This is my second ever build and I'l brand new to this. Any help is greatly appreciated!
This is the code I have working.
#include <LiquidCrystal.h>
LiquidCrystal lcd(1, 2, 4, 5, 6, 7);
int a = 0;
int e = 8;
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("Knock the number");
pinMode(e, INPUT);
}
void loop() {
int button = digitalRead(e);
lcd.setCursor(7, 1);
lcd.print(a);
if (button == HIGH) {
a ++;
lcd.setCursor(7, 1);
lcd.print(a);
delay(1000);
}
}
Using pin 1 is not good. Pin 0 and 1 are used when downloading code. They are also used for Serial Monitor, a very good tool for debugging.
Nice picture.
Have a look att "code tags", the symbol up to the left in the Quick Reply window. It makes Your code appear like this:
#include <LiquidCrystal.h>
LiquidCrystal lcd(1, 2, 4, 5, 6, 7);
int a = 0;
int e = 8;
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("Knock the number");
pinMode(e, INPUT);
}
void loop() {
int button = digitalRead(e);
lcd.setCursor(7, 1);
lcd.print(a);
if (button == HIGH) {
a ++;
lcd.setCursor(7, 1);
lcd.print(a);
delay(1000);
}
}
Thank you both. Through some copying and pasting I figured it out. I have no idea how to code.
#include <LiquidCrystal.h>
const byte buttonPin = 8;
int buttonPushCounter = 0; // counter for the number of button presses
boolean buttonState = LOW; // current state of the button
boolean lastButtonState = LOW; // previous state of the button
// lcd constructor made global in scope so the whole program can sse it
LiquidCrystal lcd(1, 2, 4, 5, 6, 7);
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("Knock the number");
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}
void loop()
{
// read the pushbutton input pin:
buttonState = digitalRead(buttonPin);
// compare the buttonState to its previous state
if (buttonState != lastButtonState)
{
if (buttonState == HIGH)
{
// if the current state is HIGH then the button
// went from off to on:
buttonPushCounter++; // add one to counter
lcd.clear();
if (buttonPushCounter > 7) // if couter over 3 reset the counter to 1 to show "Jon"
// and not "Hello All"
{
buttonPushCounter = 1;
}
Serial.println(buttonPushCounter);
switch (buttonPushCounter) // choose what to display based on buttonPushCounter value
{
case 0:
lcd.print("Hello All"); // show "Hello All until first button press
break;
case 1:
lcd.setCursor(7, 1);
lcd.print("1");
break;
case 2:
lcd.setCursor(3, 0);
lcd.print("1");
break;
case 3:
lcd.setCursor(7, 1);
lcd.print("2");
break;
case 4:
lcd.setCursor(10, 0);
lcd.print("3");
break;
case 5:
lcd.print("5");
break;
case 6:
lcd.setCursor(15, 1);
lcd.print("8");
break;
case 7:
lcd.print("Knock the number");
break;
}
}
// save the current state as the last state,
//for next time through the loop
lastButtonState = buttonState;
}
}
