Motion controlled dimmable LED porch light

[pjblink]

Hi all,

Just wanted to show you all my motion-activated LED Porch Light. Lots of 12v LED lights on here, not so many mains AC-powered bulb projects, so I thought I'd show you mine. Sketch is a standard motion sensor interrupt sketch alongside a dimming sketch, I'm sure I got it from the forums. Initially I wanted it to perform local control of the lamp via the PIR but then decided I wanted the light to come on low (33%) from dusk till dawn, and then raise to 100% when it detects motion. Because of that I've left the control logic to Vera. Below about 30% the bulb shows an obvious unstable flicker so I don't go there! Dimming and ramp up/down is beautifully smooth.

It consists of:

Arduino Nano
NRF24L01 radio
HLK-PM01 240v AC>5v DC
HC-SR501 (PIR)
240v AC Phase control dimming circuit: http://www.ebay.com/itm/111764492631
4w dimmable filament LED bulb
Wall box with blanking plate

https://youtu.be/g7UY0zDP7zU

[sincze]

@pjblink thanks for sharing. This is exactly something I can use at my parents house. At the moment I use the security camera for motion detection

[pjblink]

No problem, happy I could have been of some help!

What's nice is that mysensors triggers so fast that it grabs a security cam image from before the camera has caught up!! Excuse the driveway...

[5546dug]

@pjblink what a great project perfect for my needs.

Can you post the sketch please
Thanks Doug

[pjblink]

@5546dug Hi Doug,

Here you go. Annoyingly my PIR seems to have died after a week or so. Hoping it's a faulty unit rather than anything to do with the circuit. I've ordered another, and will see how it holds up. It seems i can trigger it by touching the unit in places, but the PIR sensor itself is dead and not detecting anything.

/*
AC Light Control
Uses up and down buttons to set levels
makes use of a timer interrupt to set the level of dimming
*/
#include <SPI.h>
#include <MySensor.h>  
#include <TimerOne.h>

#define SN "AC LED Porch Dimmer Control"
#define SV "1.3"
#define NODE_ID 30  //change to a number to assign a specific ID
#define FADE_DELAY 20  // Delay in ms for each percentage fade up/down (10ms = 1s full-range dim)
#define MOTION_CHILD 1  //ID of the motion sensor child
#define MOTION_PIN  2  // Arduino pin tied to trigger pin on the motion sensor.

volatile int i=0;               // Variable to use as a counter of dimming steps. It is volatile since it is passed between interrupts
volatile boolean zero_cross=0;  // Flag to indicate we have crossed zero
int AC_pin = 7;                 // Output to Opto Triac
int freqStep = 75;              // This is the delay-per-brightness step in microseconds. It allows for 128 steps
                                // If using 60 Hz grid frequency set this to 65
MySensor gw;

//dimming
static int currentLevel = 128;  // Current dim level...
uint8_t fadeLevel = 128; //used to store the fade level when using the buttons

//motion sensor
uint8_t lastMotion = 0;
unsigned long previousMillis = 0; // last time update //see http://stackoverflow.com/questions/10773425/performing-a-function-after-x-time for more details on this
unsigned long motionDelay = 10000; // interval at which to keep motion sensor trippped (milliseconds).  Used to prevent too frequent updates to Vera. 

boolean metric = true; 

MyMessage dimmerMsg(AC_pin, V_DIMMER);
MyMessage lightMsg(AC_pin, V_LIGHT);
MyMessage motionMsg(MOTION_CHILD, V_TRIPPED);

void setup() {  // Begin setup
  Serial.begin(115200);
  Serial.println( SN ); 
  gw.begin( incomingMessage,  NODE_ID, true);
  // Register the LED Dimmable Light with the gateway
  gw.present( 6, S_DIMMER );
  gw.sendSketchInfo(SN, SV);
  // Pull the gateway's current dim level - restore light level upon sendor node power-up
  gw.request( 6, V_DIMMER );
  gw.present(MOTION_CHILD, S_MOTION);
  
  //Setup AC PIN
  pinMode(AC_pin, OUTPUT);                          // Set the Triac pin as output
  attachInterrupt(1, zero_cross_detect, RISING);    // Attach an Interupt to Pin 2 (interupt 0) for Zero Cross Detection
  Timer1.initialize(freqStep);                      // Initialize TimerOne library for the freq we need
  Timer1.attachInterrupt(dim_check, freqStep);      // Go to dim_check procedure every 75 uS (50Hz)  or 65 uS (60Hz)
  // Use the TimerOne Library to attach an interrupt
}

void zero_cross_detect() {    
  zero_cross = true;               // set flag for dim_check function that a zero cross has occured
  i=0;                             // stepcounter to 0.... as we start a new cycle
  digitalWrite(AC_pin, LOW);
}                                 

// Turn on the TRIAC at the appropriate time
// We arrive here every 75 (65) uS
// First check if a flag has been set
// Then check if the counter 'i' has reached the dimming level
// if so.... switch on the TRIAC and reset the counter

void dim_check() {                   
  if(zero_cross == true) {              
    if(i>=fadeLevel) {                     
      digitalWrite(AC_pin, HIGH);  // turn on light       
      i=0;  // reset time step counter                         
      zero_cross=false;    // reset zero cross detection flag
                      } 
    else {
      i++;  // increment time step counter                     
    }                                
  }    
}

void loop() {  
    gw.process();

  //motion sensor code
  unsigned long currentMillis = millis();
  
     if(currentMillis - previousMillis > motionDelay){
      uint8_t motionDetect = digitalRead(MOTION_PIN);
        if(motionDetect != lastMotion){
//        Serial.print("motionDetect Value: ");
//        Serial.println(motionDetect);
          gw.send(motionMsg.set(motionDetect));  // Send tripped value to gw
          if(motionDetect == 1){
          previousMillis = currentMillis;  //"Tripped" delay 
          }
          else{
          previousMillis = currentMillis - motionDelay + 1000; //"Not tripped" delay for 1 second to stop rapid "not tripped" and "tripped" updates to Vera
          }
      lastMotion = motionDetect; 
    }    
  }
}

void incomingMessage(const MyMessage &message) {
  if (message.type == V_LIGHT || message.type == V_DIMMER) {
    
    //  Retrieve the power or dim level from the incoming request message
    int requestedLevel = atoi( message.data );
    
    // Adjust incoming level if this is a V_LIGHT variable update [0 == off, 1 == on]
    requestedLevel *= ( message.type == V_LIGHT ? 100 : 1 );
    
    // Clip incoming level to valid range of 0 to 100
    requestedLevel = requestedLevel > 100 ? 100 : requestedLevel;
    requestedLevel = requestedLevel < 0   ? 0   : requestedLevel;
    
    float percent_level;
    percent_level = 128 - (requestedLevel * 1.28);
    fadeToLevel( percent_level );
    Serial.print( "Changing level to " );
    Serial.print( requestedLevel );
    Serial.print( ", from " ); 
    Serial.println( currentLevel );
    // Inform the gateway of the current DimmableLED's SwitchPower1 and LoadLevelStatus value...
    //gw.send(lightMsg.set(currentLevel > 0 ? 1 : 0));
  
    // hek comment: Is this really nessesary?
    // gw.send( dimmerMsg.set(requestedLevel) );
  }
}

/***
 *  This method provides a graceful fade up/down effect
 */

void fadeToLevel( int toLevel ) {
 Serial.print("currentLevel Value: ");
 Serial.println(currentLevel);
 Serial.print("toLevel Value: ");
 Serial.println(toLevel);

  int delta = ( currentLevel - toLevel ) < 0 ? 1 : -1;
  Serial.print("delta Value: ");
 Serial.println(delta);
  while ( currentLevel != toLevel ) {
    currentLevel += delta;

 fadeLevel= ((int)currentLevel);
    delay( FADE_DELAY );
    //fadeLevel = toLevel;
  }
}```

[5546dug]

thanks @pjblink , I get lots of errors just wondering before I do anything, was this sketch wrote for 1.5or 2.0?
this is probably my issue as I still run 1.4.1
but thought I would run it past you first.

thx doug

[koen01]

@pjblink :
Did you use any fuses between the 240v and the 220 > 5v module?
Could you post a picture of the backside of your perfboard? I'm interested in how you wired everything up