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Arduino LED Dimmer , TV Remote Controll,  Saving  EEPROM

arduino007

Hallo

 

Actually I want to make a LED Dimmer with Arduino with Remote Controll. I tried with online help , It was good. But I need some changing in it. Please help me for it.

 

I want to save last state of LED brightness level after turn it off. I want to save it in EEPROM . If I restart Arduino, It use last Brightness level information from EEPROM and turn LED on at last brightness level. Arduino use its last setting Automatically  and I dont need to Turn it on from Remote Controller. I just change brightness from it. After that I can decrease LED brightness from Remote without Turn it on /Off.

 

Pleas help me for it.

 

 

 

Code for Dimmer LED Strip with TV Remote Controller

https://www.youtube.com/user/greatscottlab

 

 

 

#include <IRremote.h>

int bright;

int before;

int out=9; //connect your LED to pin 9

int steps=5; //dimmer steps, vary those to increase/decrease the steps between full brightness and turned off

int RECV_PIN = 11; //data out of IR receiver connects to pin 11

 

IRrecv irrecv(RECV_PIN);

 

decode_results results;

 

void setup(){

irrecv.enableIRIn(); // start the receiver

  before=0; //LED is turned off

  bright=255; //brightness value is at maximum (255)

pinMode(out,OUTPUT);

}

 

void loop() {

  if (irrecv.decode(&results)) {

 

  if (results.value==0x20DF8D72){ //Code to turn the LED ON/OFF

if(before==0){ // if the LED was turned off, then we turn it on

digitalWrite(out,HIGH);

      before=1; //LED is now turned on

    }

    else{

digitalWrite(out,LOW); //if the LED was turned on, then we turn it off

      before=0;

bright=255;

    }}

  if (results.value==0x20DFF10E && before==1){ //Code to decrease the brightness

if(bright-255/steps<0){

analogWrite(out,bright);

    }

    else{

bright=bright-255/steps;

analogWrite(out,bright);

  }}

  if (results.value==0x20DF718E && before==1){ //Code to increase the brightness

if(bright+255/steps>255){

analogWrite(out,bright);

    }

    else{   

bright=bright+255/steps;

analogWrite(out,bright);

  }}

 

irrecv.resume();

}}

Parents

  • Hi,

     

    Not sure why you're making this more complicated than it need be.

    If you're happy with the behavior of the existing code (i.e. the dimming and on/off works fine) then why not delete (or comment out, with two slashes like this //

    the line that says

    bright=255;

    (in the code area that is concerned with switching off the LED) and replace the line that says digitalWrite(out,HIGH); with:

    analogWrite(out,bright);

     

    Then, when the remote is used to turn on the LED, it will light at the previous level. No need for EEPROM, unless you're going to be unplugging/plugging the device often, which makes no sense if you're intending to use the remote control. You only have 5 levels of dimness anyway, so on the rarer occasion that you unplug the device (or switch off the mains), then it's quick to set the level again.

     

    Still, if you wish to place the level in EEPROM, then at the point the LED is switched off (at that bright=255; line in the loop function, not the setup function) stick the current brightness level into EEPROM, using:

    EEPROM.write(0, bright);

    That line will stick the brightness level into address 0 of EEPROM.

     

    Then, at the point where the lamp is switched on (which is the line that said digitalWrite(out,HIGH);   ) you can replace that line with these two lines that read from EEPROM and set the level, using:

    bright=EEPROM.read(0);
analogWrite(out,bright);

     

    And that's it.. you'd need to test it, because I'm mentally doing it, trying to understand this badly formatted code. But I believe those code changes are likely to cover the usual situations, where the brightness level gets recovered after the light is switched off, and then the power is turned off. It won't cover the scenario that the light is on, then the user adjusts the brightness, and then pulls the power. But that's a corner case that would require you to re-architect the code if you wish to do it properly - not worth it until you're more experienced in programming (maybe take a week to learn Arduino, it isn't difficult).

    And please use the syntax highlighting feature, it is described here:

    How to Ask Questions using the Create Discussion tool

    And also please make your code look neat, it allows people to help you. Some tips to get you started are described here: https://www.cs.swarthmore.edu/~newhall/unixhelp/c_codestyle.html

Reply

  • Hi,

     

    Not sure why you're making this more complicated than it need be.

    If you're happy with the behavior of the existing code (i.e. the dimming and on/off works fine) then why not delete (or comment out, with two slashes like this //

    the line that says

    bright=255;

    (in the code area that is concerned with switching off the LED) and replace the line that says digitalWrite(out,HIGH); with:

    analogWrite(out,bright);

     

    Then, when the remote is used to turn on the LED, it will light at the previous level. No need for EEPROM, unless you're going to be unplugging/plugging the device often, which makes no sense if you're intending to use the remote control. You only have 5 levels of dimness anyway, so on the rarer occasion that you unplug the device (or switch off the mains), then it's quick to set the level again.

     

    Still, if you wish to place the level in EEPROM, then at the point the LED is switched off (at that bright=255; line in the loop function, not the setup function) stick the current brightness level into EEPROM, using:

    EEPROM.write(0, bright);

    That line will stick the brightness level into address 0 of EEPROM.

     

    Then, at the point where the lamp is switched on (which is the line that said digitalWrite(out,HIGH);   ) you can replace that line with these two lines that read from EEPROM and set the level, using:

    bright=EEPROM.read(0);
analogWrite(out,bright);

     

    And that's it.. you'd need to test it, because I'm mentally doing it, trying to understand this badly formatted code. But I believe those code changes are likely to cover the usual situations, where the brightness level gets recovered after the light is switched off, and then the power is turned off. It won't cover the scenario that the light is on, then the user adjusts the brightness, and then pulls the power. But that's a corner case that would require you to re-architect the code if you wish to do it properly - not worth it until you're more experienced in programming (maybe take a week to learn Arduino, it isn't difficult).

    And please use the syntax highlighting feature, it is described here:

    How to Ask Questions using the Create Discussion tool

    And also please make your code look neat, it allows people to help you. Some tips to get you started are described here: https://www.cs.swarthmore.edu/~newhall/unixhelp/c_codestyle.html

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