Expected primary-expression before '<' token............................ I want to program an arduino board to control a fan at different speeds

[mondherayeb]

// déclarer la bibliothéque LiquidCrystal
#include <LiquidCrystal.h>
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

void setup() {
pinMode(13,OUTPUT);
pinMode(12,OUTPUT);
pinMode(11,OUTPUT);
pinMode(10,OUTPUT);
lcd.begin(16,2);
lcd.setCursor(1,0);
lcd.print("Temp= ");
lcd.setCursor(10,0);
lcd.print("C");
}

void loop() {
int Valeur=analogRead(A0);
int Vout=Valeur5.0/10231000;
int temp=Vout/10;

lcd.setCursor(7,0);
lcd.print(temp);
if(temp<=15)
{
digitalWrite(13,HIGH);
digitalWrite(12,LOW);
digitalWrite(11,LOW);
digitalWrite(10,LOW);
}
else if((temp >= 30) && (temp =< 34))
{
digitalWrite(12,HIGH);
digitalWrite(11,LOW);
digitalWrite(10,LOW);
digitalWrite(13,LOW);
}
else if((temp > 34) && (temp =<38))
{
digitalWrite(11,HIGH);
digitalWrite(12,LOW);
digitalWrite(10,LOW);
digitalWrite(13,LOW);
}
else if(temp > 38)
{
digitalWrite(10,HIGH);
digitalWrite(11,LOW);
digitalWrite(12,LOW);
digitalWrite(13,LOW);
}
else {
digitalWrite(12,LOW);
digitalWrite(13,LOW);
}
}

[J-M-L]

Hello, do yourself a favour and please read How to get the best out of this forum and modify your post accordingly (including code tags and necessary documentation for your ask).

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the compiler likely gave you more info

@mondherayeb

else if((temp >= 30) && (temp =< 34))

[anon73444976]

@mondherayeb

temp =< 34))

There?

"<="

[sterretje]

@mondherayeb, your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advise on) your project. See About the Installation & Troubleshooting category.