Need Help for my project

Projects Programming
1

Hello.
I am currently trying to make a fan that only spins if the temperature un the room is lower than the temperature set by the user. Currently, I have the following code :

#include <Adafruit_LiquidCrystal.h>

int tempRead = 0;
float tempVolt = 0;
float tempReal = 0;

Adafruit_LiquidCrystal lcd_1(0);

void setup()
{  
  pinMode(A0, INPUT);
  pinMode(A1, INPUT);
  
  pinMode(2, INPUT);
  pinMode(4, INPUT);
  
  lcd_1.begin(16, 2);

  lcd_1.setBacklight(1);
  lcd_1.print("Voulue :");
  
  lcd_1.setCursor(0, 1);
  lcd_1.print("Actuelle :");
}

void loop()
{
  // Temp inputting stuff
  
  lcd_1.setCursor(9, 0);
  lcd_1.print(); // Print the wanted stuff
  
  // Temp measuring stuff
  int tempRead = analogRead(A1);
  
  tempVolt = tempRead * 5.0;
  tempVolt = tempVolt / 1024.0;
  
  tempReal = (tempVolt - 0.5) * 100;
  
  lcd_1.setCursor(11, 1);
  lcd_1.print(tempReal);
}

Now, I need to set up two push buttons. One increases the wanted value by one (named userInput) and the other decreases it. But I really don't know how to do that. I've tested multiple things before, such as using

if (digitalRead(plusButtonPin == HIGH) )
{
  userInput ++;
}

and

if (digitalRead(minusButtonPin == HIGH) )
{
  userInput --;
}

but it doesn't work. Anyone got other ideas ?

2

buttons are typically connected between the pin and ground, the pin configured as INPUT_PULLUP to use the internal pullup resistor which pulls the pin HIGH and when pressed, the button pulls the pin LOW.

a button press can be recognized by detecting a change in state and becoming LOW and may need to be debounced (e.g. delay (20); )

3

i think it should be: (digitalRead(minusButtonPin) == HIGH);

4

Programming Electronics Academy does good work on their videos. Here is another good one on the pushbutton.

5

Thanks ! It was the tutorial video that helped me.