This script gives me an error called expected unqualified-id before "for". This is the script:
const int LED=9;
int i=0;
void setup() {
pinMode(LED,OUTPUT);
}
void loop() {
for(i=0;i<255;i++)
analogWrite(LED,i);
delay(10);
}
for (i = 255; i > 0; i--) {
analogWrite(LED,i);
delay(10);
}
}
In your code I see two problems:
The first for has no opening key. If you compile it is because you forgot to indicate it when copying the code.
The first for iterates in the range [0-254] while the second one does it in the range [255-1]. It gives the impression that the second rank is not correct.
If this is the error, the solution would be:
for (i = 254; i >= 0; i--) {
analogWrite(LED,i);
delay(10);
}
Greetings