Guidance needed in making code for the project

Projects Programming
1

Hello!
I have connected a microwave sensor with Arduino Uno. I want to turn on my lamp (with relay board) through the sensor.
I want to make my code such that when the microwave sensor does not sense motion, then after 10 seconds, it should turn on the Lamp for 30 minutes. If it senses motion in between, then it should immediately turn off the Lamp. However, I cannot make that as it is out of my knowledge. Can someone please help me to complete my code?

Please find my code below:

/*
Microwave sensor
*/

int Sensor = A2; //Input Pin
int led = 13;
int period = 5000;
unsigned long time_now = 0;

void setup() {
Serial.begin(9600);
pinMode(Sensor, INPUT); //Define Pin as input
pinMode(led , OUTPUT);
}

void loop()
{
int val = digitalRead(Sensor); //Read Pin as input
Serial.println(val);
if (val == 1){
digitalWrite(led, LOW);
Serial.print("OFF");
}

if (val == 0) {
delay(1000);
if(millis() > time_now + period){
time_now = millis();
Serial.print(time_now+period);
digitalWrite(led, HIGH);
Serial.print("ON");
}
else {
digitalWrite(led, LOW);
Serial.print("OFF");
}
}
}

PLEASE SUPPORT ME AS I AM NOVICE IN CODING.

2

Hello Intelligent,
Start by reading the 'How to post in the Forum' sticky at the top of every forum page. It will increase your chances of an answer better than shouting.

code tags
datasheets
schematic

3

Here are few things:

  1. When testing the val variable you should use HIGH and LOW.
  2. When testing the time your test should be if(millis() - time_now > period){
  3. When testing for motion you should check for a CHANGE in the state of the sensor, not the state of the sensor. Here is a link that will help: StateChangeDetection
  4. You need to support 2 timers: one for 10 seconds, and one for 30 minutes. The 10 second timer needs to be reset every time motion is detected.