Hi,
I have solved this problem in this way:
unsigned long check_millis = 0;
long interval = 1000;
unsigned long previousMillis = 0;
void setup(){
}
void loop() {
unsigned long currentMillis = millis();
if (currentMillis >= check_millis) check_millis = currentMillis;
else {
check_millis = 0;
previousMillis = 0;
}
if(currentMillis - previousMillis > interval) {
previousMillis = currentMillis;
//do somethings
}
}