Backlit Dimmable LED Mirror with Motion Sensor

[petewill]

Hi Everyone,

I have created backlit mirror based on Bruce Lacey's dimmable LED sketch. I have added a motion sensor and some on/off and fade up/down buttons. There is some logic in the code to save the dim level when the buttons are pressed. I have all my motion turn on/off logic in my Vera controller using PLEG. It could be easily adapted to control the on/off functionality in the Arduino code but I like to have my automation logic in one place (my Vera).

This was a fun project to work on and although it looks pretty ugly from the back my wife loves the way it looks in our master bathroom. I tried to document as best I could but please let me know if you have any questions.

Here is a list of the parts I used

• Items from MySensors Store http://www.mysensors.org/store/
  • Female Pin Header Connector Strip
  • Prototype Universal Printed Circuit Boards (PCB)
  • NRF24L01 Radio
  • Arduino Pro Mini
  • FTDI USB to TTL Serial Adapter
  • Capacitors (10uf and .1uf)
  • 3.3v voltage regulator
  • 5v voltage regulator
  • IRLZ44N Logic Level Transistor MOSFET
  • 12v Transformer (power supply)
  • 5 Meter LED Strip (I used 3528)
  • HC-SR501 PIR Motion Sensor Module
• 22-24 gauge wire or similar (I used Cat5/Cat6 cable)
• 2 Pole 5mm Pitch PCB Mount Screw Terminal Block

Here is a video explaining how to build it yourself.
http://youtu.be/jblaMddRDpc

Here is the Fritzing (http://fritzing.org/) wiring diagram file if you want to view in more detail: Mirror LED Wiring Diagram.fzz
https://codebender.cc/sketch:81486

[Dwalt]

@petewill
Nice!

I am curious about your power supply setup, do you mind sharing? e.g. Are you are running DC line through the attic (or crawlspace) and dropping within the walls? 12VDC? How many feeds, how long are your runs and what gauge wire are you using? I keep looking at my long dormant telephony wiring and wondering "what if...?"

-Dwalt

[petewill]

@Dwalt Thanks. Yep, I'm running DC through the walls/attic with 16 and 18 gauge wire (depending on amperage requirements). I think I have around 18 feeds of either 5v or 12v right now. I'm powering lights, blinds and MySensors devices. The longest length of wire is around 60 ft. I am lucky to have access to almost all my rooms via the basement or attic so for the most part it's relatively easy to pull lines.

What gauge are your phone wires? Depending on gauge you could probably run some low draw sensors like motion, temp/humidity or door/window sensors.

[Francois]

@petewill under what version of mysensor library did you compile this sketch library 1.4 or 1.4.1? I compile you sketch under 1.4.1 and cannot get it to work

Francois

[petewill]

@Francois I'm still using 1.4.

[hek]

@Francois said:

I compile you sketch under 1.4.1 and cannot get it to work

What compile error do you see? Did you use 1.4.1 on both GW and sensor?

[RJ_Make]

@petewill Somehow I missed this.. NICE JOB Pete!! I love it!!

[RJ_Make]

@petewill Also what kind of heat are you getting off that FET?

[petewill]

@ServiceXp thanks! In my setup I'm not getting any noticeable heat on any of my LED projects. I have run it for hours at 100% and it's not even warm to the touch.

[BulldogLowell]

this is one of those "I want one" projects, yes?

a lot of cool ways to apply this.

[Francois]

@hek Yes I am using 1.4.1 on both the sensor. This the error I am getting on the sensor node: The sensor was working on a different node it also has cap on VCC and GRD.

sensor started, id=25, parent=0, distance=2
send: 25-25-0-0 s=255,c=0,t=17,pt=0,l=5,st=fail:1.4.1
send: 25-25-0-0 s=255,c=3,t=6,pt=1,l=1,st=fail:0
read: 0-0-25 s=255,c=3,t=6,pt=0,l=1:M
send: 25-25-0-0 s=0,c=0,t=4,pt=0,l=5,st=fail:1.4.1
send: 25-25-0-0 s=1,c=0,t=1,pt=0,l=5,st=fail:1.4.1
send: 25-25-0-0 s=255,c=3,t=11,pt=0,l=10,st=fail:Mirror LED
lost parent
find parent
send: 25-25-255-255 s=255,c=3,t=7,pt=0,l=0,st=bc:
read: 0-0-25 s=255,c=3,t=8,pt=1,l=1:1
new parent=0, d=2

[hek]

Strange. Looks like distance to gw is 2 but you're actually communicating to it directly.

[Francois]

@hek this is the sketch from about that that copy and recompile on 1.4.1. I did not used the codebender to compile the sketch.

This is the serial info on the MQTT Gateway:
0;0;3;0;9;read: 25-25-0 s=255,c=0,t=17,pt=0,l=5:1.4.1
0;0;3;0;9;read: 25-25-0 s=255,c=3,t=6,pt=1,l=1:0
0;0;3;0;9;send: 0-0-25-25 s=255,c=3,t=6,pt=0,l=1,st=ok:M
0;0;3;0;9;read: 25-25-0 s=0,c=0,t=4,pt=0,l=5:1.4.1
0;0;3;0;9;read: 25-25-0 s=1,c=0,t=1,pt=0,l=5:1.4.1
0;0;3;0;9;read: 25-25-0 s=255,c=3,t=11,pt=0,l=10:Mirror LED
MyMQTT/25/255/V_SKETCH_NAME
30 27 00 1B 4D 79 4D 51 54 54 2F 32 35 2F 32 35 35 2F 56 5F 53 4B 45 54 43 48 5F 4E 41 4D 45 4D 69 72 72 6F 72 20 4C 45 44
0;0;3;0;9;read: 25-25-255 s=255,c=3,t=7,pt=0,l=0:
0;0;3;0;9;send: 0-0-25-25 s=255,c=3,t=8,pt=1,l=1,st=ok:1
0;0;3;0;9;read: 0-25-25 s=255,c=3,t=8,pt=1,l=1:1
0;0;3;0;9;send: 0-0-25-25 s=255,c=3,t=8,pt=1,l=1,st=ok:1

[Francois]

Hi I got this sketch to work. There must have being something wrong with MySensor library 1.4.1 once I re-install it and recompile the sketch it is working.

[petewill]

@Francois Great to hear and thanks for letting us know!

[Francois]

@petewill I add a light sensor to your sketch and this now slow everything down what will the reason for this be? The motion sensor will not always pickup motion. I have another node with light and motion sensor and that is working right.

Here is the code:

/***
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 * 
 * DESCRIPTION
 * This sketch provides a Dimmable LED Light using PWM and based Henrik Ekblad 
 * <henrik.ekblad@gmail.com> Vera Arduino Sensor project.  
 * Developed by Bruce Lacey, inspired by Hek's MySensor's example sketches.
 * 
 * The circuit uses a MOSFET for Pulse-Wave-Modulation to dim the attached LED or LED strip.  
 * The MOSFET Gate pin is connected to Arduino pin 3 (MIRROR_LED_PIN), the MOSFET Drain pin is connected
 * to the LED negative terminal and the MOSFET Source pin is connected to ground.  
 *
 * This sketch is extensible to support more than one MOSFET/PWM dimmer per circuit.
 *
 * REVISION HISTORY
 * Version 1.0 - February 15, 2014 - Bruce Lacey
 * Version 1.1 - February 4, 2014 - Pete B - added buttons to control on/off and dim level and a motion sensor
 ***/
 
 
#define SN "Mirror LED with PIR and LDR"
#define SV "1.2"
#define NODE_ID 50  //change to a number to assign a specific ID

#include <SPI.h>
#include <MySensor.h>
#include <Bounce2.h>
#include <MySigningNone.h>
#include <MyTransportNRF24.h>
#include <MyHwATMega328.h>

#define MIRROR_LED_CHILD 0    //ID of the LED child
#define MOTION_CHILD 1  //ID of the motion sensor child
#define CHILD_ID_LIGHT 2 //ID for LDR sensor

#define LIGHT_SENSOR_ANALOG_PIN 0

// NRFRF24L01 radio driver (set low transmit power by default) 
MyTransportNRF24 radio(RF24_CE_PIN, RF24_CS_PIN, RF24_PA_LEVEL_GW);  

#define MIRROR_LED_PIN 3      // Arduino pin attached to MOSFET Gate pin
#define UP_BUTTON_PIN 8  // Arduino Digital I/O pin number for the fade up button 
#define DOWN_BUTTON_PIN 7  // Arduino Digital I/O pin number for the fade down button 
#define POWER_BUTTON_PIN 4  // Arduino Digital I/O pin number for the power button 
#define MOTION_PIN  6  // Arduino pin tied to trigger pin on the motion sensor.

#define FADE_DELAY 10  // Delay in ms for each percentage fade up/down (10ms = 1s full-range dim)
#define FADE_PERCENTAGE 10 //The percentage the fade level will be changed when a button is pressed

MyHwATMega328 hw;
// Construct MySensors library
MySensor gw(radio, hw);

//MySensor gw; //Don't need to define pins unless they are changing from the default

static int currentLevel = 0;  // Current dim level...
uint8_t fadeLevel = 0; //used to store the fade level when using the buttons
uint8_t upPreviousValue;
uint8_t downPreviousValue;
uint8_t powerPreviousValue;

Bounce upDebouncer = Bounce();
Bounce downDebouncer = Bounce();
Bounce powerDebouncer = Bounce();

//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. 
unsigned long upPreviousMillis = 0;
unsigned long downPreviousMillis = 0; 
unsigned long buttonFadeDelay = 200; 
int lastLightLevel;

boolean metric = true; 

MyMessage motionMsg(MOTION_CHILD, V_TRIPPED);
MyMessage dimmerMsg(MIRROR_LED_CHILD, V_DIMMER);
MyMessage msg(CHILD_ID_LIGHT, V_LIGHT_LEVEL);
//MyMessage lightMsg(LED_CHILD, V_LIGHT);  removed, updating with dimmer values only

/***
 * Dimmable LED initialization method
 */
void setup()  
{ 
  Serial.println( SN ); 

  gw.begin( incomingMessage,  NODE_ID);

  // Register the LED Dimmable Light with the gateway
  gw.present(MIRROR_LED_CHILD, S_DIMMER );
  gw.present(MOTION_CHILD, S_MOTION);
  gw.present(CHILD_ID_LIGHT, S_LIGHT_LEVEL);
  
  // Send the sketch version information to the gateway and Controller
  gw.sendSketchInfo(SN, SV);
  
  metric = gw.getConfig().isMetric;
  
 
   // Setup the button
  pinMode(UP_BUTTON_PIN,INPUT);
  pinMode(DOWN_BUTTON_PIN,INPUT);
  pinMode(POWER_BUTTON_PIN,INPUT);
  
  // Activate internal pull-up
  digitalWrite(UP_BUTTON_PIN,HIGH);
  digitalWrite(DOWN_BUTTON_PIN,HIGH);
  digitalWrite(POWER_BUTTON_PIN,HIGH);
  
  // After setting up the button, setup debouncer
  upDebouncer.attach(UP_BUTTON_PIN);
  downDebouncer.attach(DOWN_BUTTON_PIN);
  powerDebouncer.attach(POWER_BUTTON_PIN);
  upDebouncer.interval(5);
  downDebouncer.interval(5);
  powerDebouncer.interval(5);
  

}

/***
 *  Dimmable LED main processing loop 
 */
void loop() 
{
  
  
  
  //process the LED commands from gateway
  gw.process();
  
 int lightLevel = (1023-analogRead(LIGHT_SENSOR_ANALOG_PIN))/10.23; 
 // Serial.println(lightLevel);
  if (lightLevel != lastLightLevel) {
      gw.send(msg.set(lightLevel));
      lastLightLevel = lightLevel;
  }  
 
 
  //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; 
      }    
    }

  
/*
There are 3 buttons attached to the mirror.  One is an on/off button and the other two will fade up/fade down.  
The sensor will remember the last fade state and fade the lights to that level next time they are turned on.

If fade up or fade down button is pressed it should store that value into a variable and when the ON button is pressed
it will fade to that previous value.
 */ 

    upDebouncer.update();
    // Get the update value
    uint8_t upValue = upDebouncer.read();
    
    unsigned long upCurrentMillis = millis();
    
    if(upCurrentMillis - upPreviousMillis > buttonFadeDelay){
      if ((upValue == LOW) && (fadeLevel<100)) { //Because of the internal pullup resistors LOW = button is presssed
      
        fadeLevel += FADE_PERCENTAGE;
        fadeLevel = fadeLevel > 100 ? 100 : fadeLevel;
        fadeToLevel( fadeLevel );
        
      }
      upPreviousMillis = upCurrentMillis;
    }
  
    downDebouncer.update();
    // Get the update value
    uint8_t downValue = downDebouncer.read();
    
    unsigned long downCurrentMillis = millis();
    
    if(downCurrentMillis - downPreviousMillis > buttonFadeDelay){
      if ((downValue == LOW) && (fadeLevel>0)) {
        
        fadeLevel -= FADE_PERCENTAGE;
        fadeLevel = fadeLevel < 0 ? 0 : fadeLevel;
        //powerState = fadeLevel; //Remember fade level for when power button is pressed
        fadeToLevel( fadeLevel );
        
      }
      downPreviousMillis = downCurrentMillis;
    }
      
    powerDebouncer.update();
    // Get the update value
    uint8_t powerValue = powerDebouncer.read();
    
    if(powerValue != powerPreviousValue){
      if (powerValue == LOW) {
      Serial.print("Power Button Pressed. fadeLevel is ");
      Serial.println(fadeLevel);
        if (currentLevel > 0) {
          fadeToLevel( 0 );
        }
        else{
          if (fadeLevel == 0) {
            fadeToLevel(50);
            fadeLevel = 50;
          }
          else{
            fadeToLevel(fadeLevel);
          }
        }
      }
      powerPreviousValue = powerValue;
    }
  
   
}

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;
    
//    Serial.print( "Changing level to " );
//    Serial.print( requestedLevel );
//    Serial.print( ", from " ); 
//    Serial.println( currentLevel );

    fadeToLevel( requestedLevel );
    }
}

/***
 *  This method provides a graceful fade up/down effect
 */
void fadeToLevel( int toLevel ) {

//  Serial.print("toLevel Value: ");
//  Serial.println(toLevel);
//  Serial.print("currentLevel Value: ");
//  Serial.println(currentLevel);
  
  int delta = ( toLevel - currentLevel ) < 0 ? -1 : 1;
  
  while ( currentLevel != toLevel ) {
    currentLevel += delta;
    analogWrite( MIRROR_LED_PIN, (int)(currentLevel / 100. * 255) );
    delay( FADE_DELAY );
  }

   // Inform the gateway of the current DimmableLED's SwitchPower1 and LoadLevelStatus value...
  //gw.send(lightMsg.set(currentLevel > 0 ? 1 : 0));  //used to send status of light (on/off) to Vera
  gw.send( dimmerMsg.set(currentLevel) );
}

[petewill]

@Francois I usually put a "millis" delay for all of my sensors that don't need instant updates (temperature, humidity, light, etc). I have had some of my sensors updating too frequently and causing communication issues for the rest of my sensors. Maybe that's what's happening to you? Try adding some code so the light sensor only updates once per 10 seconds or what ever interval you feel is good. You can use my motion sensor code as an example for adding a delay with millis.

[henno]

@petewill Just wanted to let you know that I've built two of these for my daughters but instead of putting them behind a mirror I put it under their bed. Works really good, thanks for sharing!

[petewill]

@henno Cool idea!

[hek]

@henno said:

I've built two of these for my daughters but instead of putting them behind a mirror I put it under their bed.

Scares away all the monsters? :trollface: