Hello! I am trying to make an alarming system to protect my eyes from laptop screen radiation. Here is the code I wrote (not completed yet. I will add some more features later). But it gives the "expected primary-expression before ')' token" error. I am looking at this code for a long time but couldn't find the mistake I made. Can someone help to find out where I messed up? Thanks in advance.
The Code:
#include<HCSR04.h>
#include<Wire.h>
#include<Adafruit_GFX.h>
#include<Adafruit_SSD1306.h>
#define reset 13
const int buzzer = 4;
const int red = 5;
const int green = 6;
const int yellow = 7;
int safeDis = 50;
int state = 0;
HCSR04 hc(2, 3);
Adafruit_SSD1306 oled(reset);
void setup() {
pinMode(buzzer, OUTPUT);
pinMode(red, OUTPUT);
pinMode(green, OUTPUT);
pinMode(yellow, OUTPUT);
}
void loop() {
int dis = hc.dist();
if (dis < safeDis) {
state = 1;
}
else (){
state = 0;
}
if (state = 1) {
oled.clearDisplay();
oled.setCursor(0,0);
oled.setTextColor(WHITE);
oled.setTextSize(1);
oled.print("!! Too Close !! Get Back !!");
oled.display();
digitalWrite(green, LOW);
digitalWrite(yellow, LOW);
digitalWrite(red, HIGH);
tone(buzzer, 5000);
delay(500);
digitalWrite(red, LOW);
noTone(buzzer);
delay(500);
}
else (){
oled.clearDisplay();
oled.setCursor(0,0);
oled.setTextColor(WHITE);
oled.setTextSize(1);
oled.print("Yayy, We are Safe");
oled.display();
digitalWrite(green, HIGH);
digitalWrite(red, LOW);
digitalWrite(yellow, LOW);
noTone(buzzer);
}
}
Here is the error message:
