Here is my sketch if someone finds it useful. It uses LDR to set night mode in low light conditions and vice versa, door reed switch and PIR sensor to turn ac or dc lights with the help of two channel relay and EasyIOT as server. Interrupts perform the functions of turning lights on and off while timer wake up decides the night mode implementation. Moreover, sensor node sleeps most of its time to conserve the battery.
#include <SPI.h>
#include <MySensor.h>
#define CHILD_ID_LIGHT 0
#define CHILD_ID_DOOR 1
#define CHILD_ID_PIR 2
#define CHILD_ID_LED 3
#define CHILD_ID_SAVER 4
#define LDR_PIN A0
#define DOOR_PIN 2
#define PIR_PIN 3
#define LED_PIN 4 // Relay 1 is attached
#define SAVER_PIN 5 // Relay 2 is attached
#define INTERRUPT DOOR_PIN-2
unsigned long SLEEP_TIME = 1200000; // Sleep time 1200000 i.e. 20 minutes (in milliseconds)
MySensor gw;
boolean activity = false;
boolean LEDSwitch = false;
boolean SaverSwitch = false;
boolean nightSwitch = false;
MyMessage msgLDR(CHILD_ID_LIGHT, V_LIGHT_LEVEL);
MyMessage msgDoor(CHILD_ID_DOOR, V_TRIPPED);
MyMessage msgPir(CHILD_ID_PIR, V_TRIPPED);
void setup()
{
gw.begin(NULL, AUTO, false, 1);
gw.sendSketchInfo("BedRoom", "1.2");
pinMode(DOOR_PIN,INPUT);
pinMode(PIR_PIN,INPUT);
pinMode(LED_PIN, OUTPUT);
pinMode(SAVER_PIN, OUTPUT);
digitalWrite(DOOR_PIN, HIGH);
digitalWrite(PIR_PIN, HIGH);
digitalWrite(LED_PIN, HIGH);
digitalWrite(SAVER_PIN, HIGH);
gw.present(CHILD_ID_LIGHT, S_LIGHT_LEVEL);
gw.present(CHILD_ID_DOOR, S_DOOR);
gw.present(CHILD_ID_PIR, S_MOTION);
int LightLevel;
for(int i = millis(); i < (millis() + 5000); i++){
LightLevel = (100 - ((1023-analogRead(LDR_PIN))/10.23));
}
if(LightLevel < 20){
gw.send(msgLDR.set(LightLevel));
nightSwitch = true;
}
else {
gw.send(msgLDR.set(LightLevel));
nightSwitch = false;
}
}
void loop()
{
if(nightSwitch){ //When night switch is on
int wake;
wake = gw.sleep(INTERRUPT,FALLING, SLEEP_TIME);
if(wake == 1){
if(!activity){
gw.send(msgDoor.set("1"));
gw.send(msgDoor.set("0"));
activity = true;
if((!LEDSwitch) && (!SaverSwitch)){
pirswitch();
}
else{ //activity finished
activityoff();
}
}
}
else{ //Timer wake up
int LightLevel;
if((!LEDSwitch) && (!SaverSwitch)){
for(int i = millis(); i < (millis() + 5000); i++){
LightLevel = (100 - ((1023-analogRead(LDR_PIN))/10.23));
}
}
else{
for(int i = millis(); i < (millis() + 1000); i++){
LightLevel = (100 - ((1023-analogRead(LDR_PIN))/10.23));
}
}
if((LightLevel < 10) && ((!LEDSwitch) && (SaverSwitch))){
Serial.println("Light level is less than 50%, Turning LED on");
digitalWrite(LED_PIN, LOW);
LEDSwitch = true;
SLEEP_TIME = 7200000; // Sleep time changed to 2 hours
}
else if((LightLevel > 20) && ((!LEDSwitch) && (!SaverSwitch))){
gw.send(msgLDR.set(LightLevel));
nightSwitch = false;
SLEEP_TIME = 7200000; // Sleep time changed to 2 hours
gw.sleep(SLEEP_TIME);
}
else if((LightLevel > 5) && (nightSwitch) && ((!LEDSwitch) && (!SaverSwitch))){
gw.send(msgLDR.set(LightLevel));
SLEEP_TIME = 600000; // Sleep time changed to 10 minutes
}
}
}
else { //When night switch is off
int LightLevel;
for(int i = millis(); i < (millis() + 5000); i++){
LightLevel = (100 - ((1023-analogRead(LDR_PIN))/10.23));
}
if(LightLevel < 20){
gw.send(msgLDR.set(LightLevel));
nightSwitch = true;
SLEEP_TIME = 7200000; // Sleep time changed to 2 hours
gw.sleep(INTERRUPT,FALLING, SLEEP_TIME);
}
else if((LightLevel < 30) && (!nightSwitch)){
SLEEP_TIME = 600000; // Sleep time changed to 10 minutes
gw.sleep(SLEEP_TIME);
}
else if((LightLevel < 50) && (!nightSwitch)){
SLEEP_TIME = 1800000; // Sleep time changed to 30 minutes
gw.sleep(SLEEP_TIME);
}
}
}
void pirswitch()
{
for(int i = millis(); i < (millis() + 5000); i++){ //Check PIR for activity 10 times with delay of half second
boolean tripped = digitalRead(PIR_PIN) == HIGH;
Serial.println(i);
if(tripped){
gw.send(msgPir.set(tripped?"1":"0"));
Serial.println("Motion detected");
//activity on function
activityon();
Serial.println("Loop terminated");
break;
}
}
delay(3000);
activity = false;
}
void activityon()
{
//turn saver on
digitalWrite(SAVER_PIN, LOW);
SaverSwitch = true;
Serial.println("Energy saver turned on");
int LightLevel;
for(int i = millis(); i < (millis() + 1000); i++){ //Check if energy saver is on
LightLevel = (100 - ((1023-analogRead(LDR_PIN))/10.23));
}
if(LightLevel < 10){
Serial.println("Light level is less than 50%, Turning LED on");
digitalWrite(LED_PIN, LOW);
LEDSwitch = true;
}
else{
SLEEP_TIME = 1000;
Serial.println("Sleep time changed to second");
}
}
void activityoff()
{
delay(3000);
//turn off saver or LED
digitalWrite(SAVER_PIN, HIGH);
digitalWrite(LED_PIN, HIGH);
Serial.println("Activity finished");
SaverSwitch = false;
LEDSwitch = false;
activity = false;
SLEEP_TIME = 7200000;
Serial.println("Sleep time changed to 2 hours");
}
