added pin condition

libautobar/src/lib.rs

@@ -14,11 +14,13 @@ extern {
 
 #[no_mangle]
 pub extern "C" fn set_and_sleep(pin: i32, status: bool, time: i32) -> () {
+    if pin <= 28 {
         unsafe {
             gpio_put_explict(pin, status);
             sleep_ms(time);
         }
     }
+}
 
 // this is just a mock test, supposed to pass
 #[cfg(test)]