2x Sensor & DCF time based outputs

Using Arduino Project Guidance
#1

Hello!

I’ve been playing around with an Arduino Uno for a while.
I have written a project that I want to realize.

Basically there will be 3 inputs, a light sensor, a NO/NC sensor and a DCF timer.
The DCF timer is based on Dcf77 | Thijs.Elenbaas.net

Outputs of the Arduino will be two different relais and a LCD

What I have achieved so far:

  • the DCF examples from the link above are working on my arduino, hardware and software
  • I’ve been able to get text on the 16*2 LCD, display the state change of the NO/NC sensor on the LCD, and switch the two relais (with the same behaviour though)

Unfortunately, I’m a bit stuck now, so I hope anyone wants to give me some hints on how to proceed.

In sequence this are going to be the next steps:

  • based on the NO/NC contact getting high, the two relais should be switched, one for 2 seconds, and one for 2 minutes
    When the NO/NC contact gets triggered again, the timer of the ‘2 minutes’ relais should be reset, and 2 minutes should start counting again.
    The ‘2 seconds relais’ should be triggered again for 2 seconds (assuming the trigger doesn’t happen within the first 2 seconds)
  • If that works I’d like to connect the light sensor (which could be seen as a second NO/NC sensor) and program several conditions together with the first sensor to switch the relais in a certain defined behaviour
  • After that I would like to connect the DCF module, and again change the behaviour of the 2 relais based on time, and the 2 sensors
  • Last step will be that certain information (still to be defined) will be displayed on the LCD for troubleshooting purposes

I added the code I have so far.
Any help is appreciated, first for the first step, getting the two relais to behave differently based on one NO/NC input
(without the delay() statement, as I know that’s not a good way of doing that)

Thanks in advance!

#include <LiquidCrystal.h>
LiquidCrystal lcd (12 ,11 ,5 ,4, 3 ,2);

const int switchPin = 6;
int SwitchState = 0;
int prevSwitchState = 0;

void setup() {
 lcd.begin(16, 2);
 pinMode (switchPin, INPUT);
 pinMode (7, OUTPUT);
 pinMode (8, OUTPUT);
 digitalWrite(7, LOW);
 digitalWrite(8, LOW);
  
 lcd.print("Initialisation"); 
 lcd.setCursor(0, 1);
 lcd.print("sensor module");
 delay(5000);
 lcd.clear();
 lcd.setCursor(0, 0);
 lcd.print("Status PIN:");  
 lcd.setCursor(0, 1);
 lcd.print("No alarm");
}

void loop() {
  SwitchState = digitalRead(switchPin);
  
  if (SwitchState != prevSwitchState) {
    if (SwitchState == LOW) {
      digitalWrite(7, LOW);
      digitalWrite(8, LOW);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Status PIN:");  
      lcd.setCursor(0, 1);
      lcd.print("No alarm");
  }
   if (SwitchState == HIGH) {
      digitalWrite(7, HIGH);
      digitalWrite(8, HIGH);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Status PIN:");  
      lcd.setCursor(0, 1);
      lcd.print("ALARM NO/NC");
      delay(10000);
  }
 }
 prevSwitchState = SwitchState; 
}
#2