💬 Dimmable LED Actuator


  • Admin

    This thread contains comments for the article "Dimmable LED Actuator" posted on MySensors.org.



  • Hi,

    i am still kind of a beginner in programming...😞

    how does the:

     * This sketch is extensible to support more than one MOSFET/PWM dimmer per circuit.
     * http://www.mysensors.org/build/dimmer
    

    work?

    i have tried starting with adding a "_1" LED_PIN and other stuff:

    #define LED_PIN 3      // Arduino pin attached to MOSFET Gate pin
    #define LED_PIN_1 6      // Arduino pin attached to MOSFET Gate pin
    #define FADE_DELAY 35  // Delay in ms for each percentage fade up/down (10ms = 1s full-range dim)
    
    static int currentLevel = 0;  // Current dim level...
    static int currentLevel_1 = 0;  // Current dim level...
    MyMessage dimmerMsg(0, V_DIMMER);
    MyMessage dimmerMsg1(1, V_DIMMER);
    MyMessage lightMsg(0, V_LIGHT);
    MyMessage lightMsg1(1, V_LIGHT);
    
    /***
     * Dimmable LED initialization method
     */
    void setup()  
    { 
      // Pull the gateway's current dim level - restore light level upon sendor node power-up
      request( 0, V_DIMMER );
      request( 1, V_DIMMER );
    }
    
    void presentation() {
      // Register the LED Dimmable Light with the gateway
      present( 0, S_DIMMER );
      present( 1, S_DIMMER );
      
      sendSketchInfo(SN, SV);
    }
    

    , but this does not seem right, as i can not differentiat between for the input 😕

    thanks in advance



  • It looks like you are trying to add another LED/Mosfet? I have done it this way, I have 3 on mine:

    To do this I may or may not have used some examples I found on this forum. I basically add the pins I am using (PWM capable) into an array. I have 4 pins defined (3 is in there twice) to get around the array references starting from 0. Probably a better way to do that but this was my quick way round it.

    I have basically adapted the code from the example LED Dimmer sketch to work with the array / multiple child devices.

    Hopefully thats helpful and what you were after?

    // Enable debug prints to serial monitor
    #define MY_DEBUG 
    
    // Enable and select radio type attached
    #define MY_RADIO_NRF24
    //#define MY_RADIO_RFM69
    
    #include <SPI.h>
    #include <MySensors.h> 
    
    #define SN "MultiDimmableLED"
    #define SV "1.1"
    
    #define noLEDs 3
    const int LED_Pin[] = {3, 3, 5, 6}; //put 3 in twice as a start from 0 workaround
    
    #define FADE_DELAY 10  // Delay in ms for each percentage fade up/down (10ms = 1s full-range dim)
    
    static int currentLevel = 0;  // Current dim level...
    MyMessage dimmerMsg(noLEDs, V_DIMMER);
    MyMessage lightMsg(noLEDs, V_LIGHT);
    
    
    
    /***
     * Dimmable LED initialization method
     */
    void setup()  
    { 
      // not sure this works
      // Pull the gateway's current dim level - restore light level upon sendor node power-up
    for (int sensor=1; sensor<=noLEDs; sensor++){
      request( sensor, V_DIMMER );
     }
    }
    
    void presentation() {
      // Register the LED Dimmable Light with the gateway
     for (int sensor=1; sensor<=noLEDs; sensor++){
     present(sensor, S_DIMMER);
     delay(2);
     }
      sendSketchInfo(SN, SV);
    }
    
    /***
     *  Dimmable LED main processing loop 
     */
    void loop() 
    {
    }
    
    
    
    void receive(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 LED " );
        Serial.print(message.sensor);
        Serial.print(", PIN " );
        Serial.print( LED_Pin[message.sensor] );
        Serial.print(" level to " );
        Serial.print( requestedLevel );
        Serial.print( ", from " ); 
        Serial.println( currentLevel );
    
        
        fadeToLevel( requestedLevel, message.sensor );
        
        // Inform the gateway of the current DimmableLED's SwitchPower1 and LoadLevelStatus value...
        send(lightMsg.set(currentLevel > 0 ? 1 : 0));
    
        // hek comment: Is this really nessesary?
        send( dimmerMsg.set(currentLevel) );
    
        
        }
    }
    
    /***
     *  This method provides a graceful fade up/down effect
     */
    void fadeToLevel( int toLevel, int ledid ) {
    
      int delta = ( toLevel - currentLevel ) < 0 ? -1 : 1;
      
      while ( currentLevel != toLevel ) {
        currentLevel += delta;
        analogWrite( LED_Pin[ledid], (int)(currentLevel / 100. * 255) );
        delay( FADE_DELAY );
      }
    }
    
    

  • Contest Winner

    @thazlett144 can't help to make a few comments on your sketch (sorry)

    The led the array start from 0 and prevent the double pin declaration simply subtract one on usage so
    this LED_Pin[ledid] becomes this LED_Pin[ledid-1]

    please do use wait() instead of delay(), delay is blocking MySensors communication

        // hek comment: Is this really nessesary?
        send( dimmerMsg.set(currentLevel) );
    

    Answer: Yes, controllers like Vera want feedback about the new dimlevel



  • Hi,

    thank you both, i will be testing soon!

    thanks again!



  • so this works now like a charm:

    // Enable debug prints to serial monitor
    #define MY_DEBUG 
    
    // Enable and select radio type attached
    #define MY_RADIO_NRF24
    //#define MY_RADIO_RFM69
    
    #define MY_NODE_ID 153 
    
    #include <SPI.h>
    #include <MySensors.h> 
    
    #define SN "MultiDimmableLED"
    #define SV "1.1"
    
    #define noLEDs 3
    const int LED_Pin[] = {3, 5, 6}; 
    
    #define FADE_DELAY 25  // Delay in ms for each percentage fade up/down (10ms = 1s full-range dim)
    
    static int currentLevel = 0;  // Current dim level...
    MyMessage dimmerMsg(noLEDs, V_DIMMER);
    MyMessage lightMsg(noLEDs, V_LIGHT);
    
    
    
    /***
     * Dimmable LED initialization method
     */
    void setup()  
    { 
      // not sure this works
      // Pull the gateway's current dim level - restore light level upon sendor node power-up
    for (int sensor=1; sensor<=noLEDs; sensor++){
      request( sensor, V_DIMMER );
     }
    }
    
    void presentation() {
      // Register the LED Dimmable Light with the gateway
     for (int sensor=1; sensor<=noLEDs; sensor++){
     present(sensor, S_DIMMER);
     wait(2);
     }
      sendSketchInfo(SN, SV);
    }
    
    /***
     *  Dimmable LED main processing loop 
     */
    void loop() 
    {
    }
    
    
    
    void receive(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 LED " );
        Serial.print(message.sensor);
        Serial.print(", PIN " );
        Serial.print( LED_Pin[message.sensor] );
        Serial.print(" level to " );
        Serial.print( requestedLevel );
        Serial.print( ", from " ); 
        Serial.println( currentLevel );
    
        
        fadeToLevel( requestedLevel, message.sensor );
        
        // Inform the gateway of the current DimmableLED's SwitchPower1 and LoadLevelStatus value...
        send(lightMsg.set(currentLevel > 0 ? 1 : 0));
    
        // hek comment: Is this really nessesary?
        send( dimmerMsg.set(currentLevel) );
    
        
        }
    }
    
    /***
     *  This method provides a graceful fade up/down effect
     */
    void fadeToLevel( int toLevel, int ledid ) {
    
      int delta = ( toLevel - currentLevel ) < 0 ? -1 : 1;
      
      while ( currentLevel != toLevel ) {
        currentLevel += delta;
        analogWrite(LED_Pin[ledid-1], (int)(currentLevel / 100. * 255) );
        wait( FADE_DELAY );
      }
    }```
    
    thank you :thumbsup:

  • Hero Member

    I just tried the DimmableLightWithRotaryEncoderButton and I found that when rotating the rotary encoder clockwise the dim level decrease and turning it counter clockwise will increase the dim level. I would like it the other way around.

    Any ideas how to modify the sketch? Or is this a feature of my rotary encoder? Did I wire something wrong (I did check my wires and it is according to the instructions).


  • Admin

    Did you try just switching the pins for KNOB_ENC_PIN_x?


  • Hero Member

    @hek said:

    Did you try just switching the pins for KNOB_ENC_PIN_x?

    That did the trick. Thanks!



  • @BartE Thats great thank you. I am still learning anyway so there are gaps in my knowledge 🙂 I knew I could do something like that -1.

    delay was part of the original example I think?



  • Hi guys,

    Struggling with this a little and think it may be hardware related. I'm using a 3.3v pro mini and it won't let the 12v LEDs go to full brightness, at max dim level they're still quite dim. I've tried this on both regular flexi LED strip and the copper-wire type LEDs (final project is based on these).

    I've tried with a different FET, an IRLB8721 and that goes to full brightness however won't switch the LEDS off completely so guessing there's a leak from that FET! I'm not sure if that's normal or not. Frustrating.

    Ideally i want the circuitry to be 3.3v as i'm already converting the 12v LED power supply down to 3.3v for the nRF. I'd rather not have a 5v and 3.3v regulator.

    Thanks,

    Patrick


  • Mod

    @pjblink I had the same problem in https://forum.mysensors.org/topic/2335/controlling-leds-with-the-irlz44n/ and another community member had something similar: https://forum.mysensors.org/topic/2335/controlling-leds-with-the-irlz44n/

    The solution seems to be to buy new mosfets and hope that they work properly.



  • @mfalkvidd So keep trying IRLZ44N FETs?


  • Mod

    @pjblink probably. Several people have reported their IRLZ44N opening fully at 3.3V.


  • Hero Member

    Inspirational pictures from my Dimmable LED Actuator with rotary encoder device I made for my sons bedside lamp.
    Running this at 12VDC. His lamp had a G9 socket so I just broke apart the G9 LED bulb and soldered some G4 12VDC LED lights like these to it and replaces the "Dumb" switch with a 5mm DC plug. It turned out so nice that I think I will MySensor my own bedside lamp also.

    Edit: btw, I found the nice big knobs from here -> eBay

    0_1476680417320_WP_20161014_07_07_53.jpg

    0_1476680429390_WP_20161014_07_11_47.jpg


  • Hero Member

    Bahh.. I had the 12VDC connected directly to the RAW pin on the Arduino Pro mini and yesterday it failed.
    I should have known better. Now added a 5V regulator to the device and a new 5V Pro Mini.



  • Hi all
    I love the mysensors project. I have made a lot of sensors by now. Now I would like to control these LED-lights with a dimmer node:
    http://www.siriushome.dk/product/50200/ (in danish)
    The specs. for the LEDs are 6W@80V.
    I have two questions that I hope you can help me with.
    A) What is the easiest way to drive an arduinonode from 80v. Is a DC/DC converter the only way?
    B) What mosfet would you suggest using for controling the LEDs?

    I hope you can help. Many thanks.

    // MalmQ



  • @pjblink the irlzn44n is very sensitive to over heat during solder, I have lost some of them during soldering 🙂 please be careful



  • Hi!

    I'd like to use this sketch with a 5V Arduino Nano, do I need to use another type of MOSFET for this?
    From the OP I gather that the IRLZ44N is used because of the lower gate threshold in combination with the 3.3v operating voltage, but won't the IRLZ44N gate be saturated very quickly when using 5v?

    Creaky


  • Mod

    @Creaky the dimmer uses PWM to control the light level, so the mosfet is always either in cutoff or fully saturated. So using IRLz44N with 5V will work just as well as 3.3V.



  • @mfalkvidd Thanks for the reply!



  • @mfalkvidd Just so you know, there is no PWM involved in this sketch. I've just build this setup/node and it works great. You can see that the LED are continuously fed and brightness is changed by changing the voltage to the LEDs through the MOSFET.


  • Mod

    @Creaky the sketch linked in the first post uses pwm. But you might be using some other sketch?



  • It might be a very nice idea to use neopixels with this, a little expensive though when using a lot of LED's but still it's possible to dim them just by using code.. I am afraid I am not able to do that and it was just a small thought... 🙂



  • @mfalkvidd Yikes, you're right! I drew my conclusion too soon and only by watching the LED strip at max brightness. At max brightness the switching frequency is so high it is no longer perceptible by the eye. Mea culpa...


  • Mod

    @Creaky yes the switching is pretty quick. I guess that's the whole idea 🙂 I have noticed a refraction pattern in the kitchen sink when using a thin jet of water though.

    The analogWrite function in Arduino is very poorly named, since it doesn't really write an analog value. But I guess it is hard to change now.



  • I plan to use a LED strip as a closet light, controlled by a magnetic door switch, and of course also controllable in Domoticz. What would be the right way to write the code, should the pro mini send the state of the magnetic switch to the controller and then let the controller turn on the light, or is it easier to let the pro mini turn on the light directly and then report the state back to the controller? Big difference in delay?



  • It's a closet with two sliding doors and therefore two magnetic switches, and I want the LED to turn on when opening one of the doors, but also be able to turn it off remotely if we forgot to close it when leaving our home.



  • I would like to use this with a 48 Watt led which uses a constant-current power supply 54 - 87 VDC 600 ma output. This mosfet isn't high enough voltage rating, the IRF630MFP is rated at 200V 9amp, however I have questions about if the uC output will power the gate. The gate-source voltage is +/- 20. The VGS(th) gate threshold voltage is 2 to 4 volts with typ 3V. I would cut the negative from the power supply and connect to source, then connect the Led negative to drain, and connect the drain to ground on the uC? I need a reality check- does this sound possible or will I fry something?



  • Hi,
    I'm new in MySensors and build this Dimmer - LED with and without the rotary encoder which works fine.
    Now I would like to decouple the rotary encoder as a battery powered "standalone" sensor which is (in best case) connected directly to the LED-Dimmer. Furthermore the decoupled rotary encoder should be always in sleep mode until the rotary encoder awake the arduino.
    Is that possible ? I'm just stuck to seperate the code for the rotary encoder from the led-dimmer code.
    Thank you in advance.



  • hi, i used the example sketch. i also changed from "delay" to "wait" in fade section. The problem: i can change the percentage for example 8 times and then the gateway crashes and reboots. In a other case it works 12 times and then the gateway crashes. All other nodes (Temp, Hum) works fine all the time.



  • oh, i use mysensors serial gateway connected to a raspberry with fhem running.


  • Mod

    @joschre could you post the debug output from the node?



  • Problem solved! The 3.3v Form arduino nano was too Bad for the nrf24l01j pa lna with PA_LEVEL MAX. NOW i usw an external regulator an everything is fine 🙂 sorry for this newbie fault 😄


  • Mod

    @joschre great that you found a solution. Thank for reporting back.


  • Contest Winner

    Hi, I've noticed the V_DIMMER of the example is not (anymore?) available in https://www.mysensors.org/download/serial_api_20, am I wrong? Thanks


  • Mod

    @user2684 you're right. I think it is supposed to be S_DIMMER (S_ is used for presentation)



  • Dear Guys,

    How can I control an RGB ledstrip with this config may I add more MOSFAT or how ?
    Thank you very much.

    L


  • Hero Member

    @Laces yes you can. The principal is the same, just one mosfet per channel.
    Search the forum for RGB or RGBW and you sould be able to find some examples.



  • This post is deleted!


  • This post is deleted!


  • Ah I have just built a test bed with this setup however it appears the circuit diagram in the Fritizing is actually not 100% correct. The red wire from the protoboard is connected to the GND of the Pro Mini - this confused me as I was using the GND/RAW pins to identify the cable color. If you flip the red/blue connections on the Pro Mini it will be right. Small issue I know but I had to reference another image to get the circuit to work.



  • Hi Folks,

    I have build this in combination with a ethernet gateway. Works perfect, however, when for whatever reason the network fails, I cannot control my lights anymore.

    Is there a possibilty toi have it working also "stand alone" when the network fails?

    Grtz.

    KoenP


 

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