💬 OH MySensors RGBW Controller

Cliff Karlsson

I had the same problem with dirtypcbs so I ordered from seedstudio instead. Almost the same price.

LastSamurai

Oh thats just a naming issue. Rename the "RGBWController-Edge.cuts.gm1" to .gml in the zip file and it should work just fine.

peerkersezuuker

Just got the v1.3 pcb's from OSH Park, just waiting for some components, and the we go. It will be an exciting christmas ;-)

Jan Gatzke

I got my v1.3 pcbs from Smart Prototyping. Quality is good. The controller works fine BUT the sketch version in your github repo is broken. Seems like the non linear fading part never got finished. I am now using linear fading and the sketch is working. :)

peerkersezuuker

@Jan-Gatzke
Hi can you please post your adjusted sketch for further reference?

Jan Gatzke

@peerkersezuuker

You have to fix the following part:

for (int i = 0; i < NUM_CHANNELS; i++) {
    if (isOn) {
      // normal fading
      //analogWrite(channels[i], dimming / 100.0 * values[i]);

      // non linear fading, idea from https://diarmuid.ie/blog/pwm-exponential-led-fading-on-arduino-or-other-platforms/
      analogWrite(channels[i], pow (2, (dimming / R)) - 1);
    } else {
      analogWrite(channels[i], 0);
    }
  }

Corrected Version

for (int i = 0; i < NUM_CHANNELS; i++) {
    if (isOn) {
      // normal fading
      analogWrite(channels[i], dimming / 100.0 * values[i]);

      // non linear fading, idea from https://diarmuid.ie/blog/pwm-exponential-led-fading-on-arduino-or-other-platforms/
      //analogWrite(channels[i], pow (2, (dimming / R)) - 1);
    } else {
      analogWrite(channels[i], 0);
    }
  }

Or else all channels are set to the Value of dimming. The sketch on openhardware.io is broken, too.

peerkersezuuker

@Jan-Gatzke
Thank you for your post.
I hope the Mosfet's are comming in today, then i can build it up and play with it.

LastSamurai

@Jan-Gatzke Thank you for correcting it ;) I never got around to making the fading part work a 100% so I reverted back to my normal linear fading for my controllers. Seems like I forgot to correct that in my git repo :frowning: Sorry for that, I will fix it after christmas.
Great to hear that others are using the controllers too! Have fun with them and update me if you change something or build some (other) cool thing with them!

peerkersezuuker

A little question, the v1.3 is this the one with the corrected mosfet placement ?
I build and programmed one now, but i only get a bright white light, and no response when i switch the node. So now i am in doubt...

With regards
Peer

Jan Gatzke

@peerkersezuuker

The node always starts with white on. This is normal behaviour.

peerkersezuuker

@Jan-Gatzke
Thank you, i see it in the code now ...
I tested it with setting the RGB levels one by one to 255, and this works, so the channels are responding to the initialisation code.
And because it is rebuild to version 2.0, i forgot one void to adjust...
void incomingMessage(
should be
void receive(

Problem solved, thank you very much.
With regards
Peer van Hoek

Jan Gatzke

@peerkersezuuker

Great.Can you post the complete 2.0 sketch, please? I am going to upgrade and this would be a good starting point.

peerkersezuuker

@Jan-Gatzke
Sure, no problem.
But it is not 100% clean, i am just a coppier and paste'r....
If you can clean it up that would be nice.

/**
Based on the MySensors Project: http://www.mysensors.org

This sketch controls a (analog)RGBW strip by listening to new color values from a (domoticz) controller and then fading to the new color.

Version 1.0 - Changed pins and gw definition
Version 0.9 - Oliver Hilsky

TODO
safe/request values after restart/loss of connection
*/
#define MY_DEBUG 

#define SN   "RGBW 01"
#define SV   "1.0"
#define MY_RADIO_NRF24
// change the pins to free up the pwm pin for led control
#define MY_RF24_CE_PIN 4 //<-- NOTE!!! changed, the default is 9
#define MY_RF24_CS_PIN 10 // default is 10
#define MY_RF24_PA_LEVEL RF24_PA_MAX
#define MY_REPEATER_FEATURE
#define MY_NODE_ID 6


// Load mysensors library	
#include <MySensors.h>	
// Load Serial Peripheral Interface library  
#include <SPI.h>

// Arduino pin attached to driver pins
#define RED_PIN 3 
#define WHITE_PIN 9
#define GREEN_PIN 5
#define BLUE_PIN 6
#define NUM_CHANNELS 4 // how many channels, RGBW=4 RGB=3...
#define CHILD_ID 1

// Smooth stepping between the values
#define STEP 1
#define INTERVAL 10
const int pwmIntervals = 255;
float R; // equation for dimming curve

// Stores the current color settings
byte channels[4] = {RED_PIN, GREEN_PIN, BLUE_PIN, WHITE_PIN};
byte values[4] = {0, 0, 0, 255};
byte target_values[4] = {0, 0, 0, 255}; 


// stores dimming level
byte dimming = 100;
byte target_dimming = 100;

// tracks if the strip should be on of off
boolean isOn = true;

// time tracking for updates
unsigned long lastupdate = millis();
     
void setup() 
{
  // Initializes the sensor node (with callback function for incoming messages)
  //begin(incomingMessage);	// 123 = node id for testing	
       
  // Set all channels to output (pin number, type)
  for (int i = 0; i < NUM_CHANNELS; i++) {
    pinMode(channels[i], OUTPUT);
  }

  // set up dimming
  R = (pwmIntervals * log10(2))/(log10(255));

  // get old values if this is just a restart
  request(CHILD_ID, V_RGBW);

  // init lights
  updateLights();
  
  // debug
  if (isOn) {
    Serial.println("RGBW is running...");
  }
 
  Serial.println("Waiting for messages...");  
}

void presentation()  {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo(SN, SV);

  // Register this device as Waterflow sensor
  present(CHILD_ID, S_RGBW_LIGHT, SN, true);
}

void loop()
{
  // Process incoming messages (like config and light state from controller) - basically keep the mysensors protocol running
//  process();		

  // and set the new light colors
  if (millis() > lastupdate + INTERVAL) {
    updateLights();
    lastupdate = millis();
  } 
}

// callback function for incoming messages
void receive(const MyMessage &message) {

  Serial.print("Got a message - ");
  Serial.print("Messagetype is: ");
  Serial.println(message.type);

  // acknoledgment
  if (message.isAck())
  {
   	Serial.println("Got ack from gateway");
  }
  
  // new dim level
  else if (message.type == V_DIMMER) {
      Serial.println("Dimming to ");
      Serial.println(message.getString());
      target_dimming = message.getByte();

      // a new dimmer value also means on, no seperate signal gets send (by domoticz)
    isOn = true;
  }

  // on / off message
  else if (message.type == V_STATUS) {
    Serial.print("Turning light ");

    isOn = message.getInt();

    if (isOn) {
      Serial.println("on");
    } else {
      Serial.println("off");
    }
  }

  // new color value
  else if (message.type == V_RGBW) {    
    const char * rgbvalues = message.getString();
    inputToRGBW(rgbvalues);  

    // a new color also means on, no seperate signal gets send (by domoticz); needed e.g. for groups
    isOn = true;  
  }  
}

// this gets called every INTERVAL milliseconds and updates the current pwm levels for all colors
void updateLights() {  

  // update pin values -debug
  //Serial.println(greenval);
  //Serial.println(redval);
  //Serial.println(blueval);
  //Serial.println(whiteval);

  //Serial.println(target_greenval);
  //Serial.println(target_redval);
  //Serial.println(target_blueval);
  //Serial.println(target_whiteval);
  //Serial.println("+++++++++++++++");

  // for each color
  for (int v = 0; v < NUM_CHANNELS; v++) {

    if (values[v] < target_values[v]) {
      values[v] += STEP;
      if (values[v] > target_values[v]) {
        values[v] = target_values[v];
      }
    }

    if (values[v] > target_values[v]) {
      values[v] -= STEP;
      if (values[v] < target_values[v]) {
        values[v] = target_values[v];
      }
    }
  }

  // dimming
  if (dimming < target_dimming) {
    dimming += STEP;
    if (dimming > target_dimming) {
      dimming = target_dimming;
    }
  }
  if (dimming > target_dimming) {
    dimming -= STEP;
    if (dimming < target_dimming) {
      dimming = target_dimming;
    }
  }

  /*
  // debug - new values
  Serial.println(greenval);
  Serial.println(redval);
  Serial.println(blueval);
  Serial.println(whiteval);

  Serial.println(target_greenval);
  Serial.println(target_redval);
  Serial.println(target_blueval);
  Serial.println(target_whiteval);
  Serial.println("+++++++++++++++");
  */

  // set actual pin values
  for (int i = 0; i < NUM_CHANNELS; i++) {
    if (isOn) {
      // normal fading
      analogWrite(channels[i], dimming / 100.0 * values[i]);

      // non linear fading, idea from https://diarmuid.ie/blog/pwm-exponential-led-fading-on-arduino-or-other-platforms/
      //analogWrite(channels[i], pow (2, (dimming / R)) - 1);
    } else {
      analogWrite(channels[i], 0);
    }
  }
}

// converts incoming color string to actual (int) values
// ATTENTION this currently does nearly no checks, so the format needs to be exactly like domoticz sends the strings
void inputToRGBW(const char * input) {
  Serial.print("Got color value of length: "); 
  Serial.println(strlen(input));
  
  if (strlen(input) == 6) {
    Serial.println("new rgb value");
    target_values[0] = fromhex (& input [0]);
    target_values[1] = fromhex (& input [2]);
    target_values[2] = fromhex (& input [4]);
    target_values[3] = 0;
  } else if (strlen(input) == 9) {
    Serial.println("new rgbw value");
    target_values[0] = fromhex (& input [1]); // ignore # as first sign
    target_values[1] = fromhex (& input [3]);
    target_values[2] = fromhex (& input [5]);
    target_values[3] = fromhex (& input [7]);
  } else {
    Serial.println("Wrong length of input");
  }  


  Serial.print("New color values: ");
  Serial.println(input);
  
  for (int i = 0; i < NUM_CHANNELS; i++) {
    Serial.print(target_values[i]);
    Serial.print(", ");
  }
 
  Serial.println("");
  Serial.print("Dimming: ");
  Serial.println(dimming);
}

// converts hex char to byte
byte fromhex (const char * str)
{
  char c = str [0] - '0';
  if (c > 9)
    c -= 7;
  int result = c;
  c = str [1] - '0';
  if (c > 9)
    c -= 7;
  return (result << 4) | c;
}```

Jan Gatzke

@peerkersezuuker

If I find the time, I will clean it up. I want to have a look at the non linear fading. IMHO the initial settings need to be customized, too. Instead of switching the white LEDs on the node could request the values from the controller (if possible) or from eeprom.

Jan Gatzke

As promised I had a look at the sketch. The node can now save and restore values for rgbw, dimming and status to/from the controller. I had a look at the non linear fading, too. I got it partially working and refreshed my math knowledge a lot. :)
In the end I removed the code for it because it made the sketch much more complicated and I didn't like the results. The formula from the original sketch was ok for fading a single LED from 0% to 100%. It didn't cover other starting values and the combination of the colors. IMHO only the dimming can be done non linear without problems. For this I would use a static table of PWM values and percent values. Doing the log calculations on the pro mini seems to be too slow for a smooth fading. I saw massive flickering.

Here is the sketch:

/**
  Based on the MySensors Project: http://www.mysensors.org

  This sketch controls a (analog)RGBW strip by listening to new color values from a (domoticz) controller and then fading to the new color.

  Version 1.1 - Added save/restore of values to/from controller, removed non linear fading code
  Version 1.0 - Changed pins and gw definition
  Version 0.9 - Oliver Hilsky

**/
#define MY_DEBUG

#define SN   "RGBW 01"
#define SV   "1.1"
#define MY_RADIO_NRF24
// change the pins to free up the pwm pin for led control
#define MY_RF24_CE_PIN 4 //<-- NOTE!!! changed, the default is 9
#define MY_RF24_CS_PIN 10 // default is 10
// Set LOW transmit power level as default, if you have an amplified NRF-module and
// power your radio separately with a good regulator you can turn up PA level.
#define MY_RF24_PA_LEVEL RF24_PA_LOW
//Uncomment to enable repeater mode
//#define MY_REPEATER_FEATURE
//Uncomment to assign static node ID
//#define MY_NODE_ID 9


// Load mysensors library
#include <MySensors.h>
// Load Serial Peripheral Interface library
#include <SPI.h>

// Arduino pin attached to driver pins
#define RED_PIN 3
#define WHITE_PIN 9
#define GREEN_PIN 5
#define BLUE_PIN 6
#define NUM_CHANNELS 4 // how many channels, RGBW=4 RGB=3...
#define CHILD_ID 1

// Smooth stepping between the values
#define STEP 1
#define INTERVAL 10

MyMessage lastvalueMsg(CHILD_ID, V_VAR1);
MyMessage lastisonMsg(CHILD_ID, V_VAR2);
MyMessage lastdimmMsg(CHILD_ID, V_VAR3);

// Stores the current color settings
byte channels[4] = {RED_PIN, GREEN_PIN, BLUE_PIN, WHITE_PIN};
byte values[4] = {0, 0, 0, 0};
byte target_values[4] = {0, 0, 0, 0};


// stores dimming level
byte dimming = 100;
byte target_dimming = 100;

// tracks if the strip should be on of off
boolean isOn = false;
// tracks if the strip's last status was off. This overrides isOn at startup
boolean wasOff = true;
//tracks if the old values have bben requested from the controller. This prevents the request from being send multipßle times in the main loop.
boolean valuesrequested = false;
// time tracking for updates
unsigned long lastupdate = millis();

void setup()
{
  // Set all channels to output (pin number, type)
  for (int i = 0; i < NUM_CHANNELS; i++) {
    pinMode(channels[i], OUTPUT);
  }
  // debug
  if (isOn) {
    Serial.println("RGBW is running...");
  }
}

void presentation()  {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo(SN, SV);

  // Register this device as Waterflow sensor
  present(CHILD_ID, S_RGBW_LIGHT, SN, true);
}

void loop()
{
  if (!valuesrequested) {
    // get old values if this is just a restart
    Serial.println("Requesting old values...");
    //Request RGBW values
    request( CHILD_ID, V_VAR1 );
    wait(200);
    //Request Status
    request( CHILD_ID, V_VAR2 );
    wait(200);
    //Request dimm level
    request( CHILD_ID, V_VAR3 );
    valuesrequested = true;
  }

  // set the new light colors
  if (millis() > lastupdate + INTERVAL) {
    updateLights();
    lastupdate = millis();
  }
}

// callback function for incoming messages
void receive(const MyMessage &message) {

  Serial.print("Got a message - ");
  Serial.print("Messagetype is: ");
  Serial.println(message.type);

  // acknoledgment
  if (message.isAck())
  {
    Serial.println("Got ack from gateway");
  }

  // new dim level
  else if (message.type == V_DIMMER or message.type == V_VAR3) {
    Serial.println("Dimming to ");
    Serial.println(message.getString());
    target_dimming = message.getByte();
    send(lastdimmMsg.set(target_dimming));

    if (!wasOff) {
      // a new dimmer value also means on, no seperate signal gets send (by domoticz)
      isOn = true;
      send(lastisonMsg.set(isOn));
    }
  }

  // on / off message
  else if (message.type == V_STATUS or message.type == V_VAR2) {
    Serial.print("Turning light ");

    isOn = message.getInt();

    if (isOn) {
      Serial.println("on");
      wasOff = false;
    } else {
      Serial.println("off");
    }
    send(lastisonMsg.set(isOn));
  }

  // new color value
  else if (message.type == V_RGBW or message.type == V_VAR1) {
    const char * rgbvalues = message.getString();
    send(lastvalueMsg.set(rgbvalues));
    inputToRGBW(rgbvalues);
    if (!wasOff) {
      // a new color also means on, no seperate signal gets send (by domoticz); needed e.g. for groups
      isOn = true;
      send(lastisonMsg.set(isOn));
    }
  }
}

// this gets called every INTERVAL milliseconds and updates the current pwm levels for all colors
void updateLights() {
  // update pin values -debug
  //Serial.println(greenval);
  //Serial.println(redval);
  //Serial.println(blueval);
  //Serial.println(whiteval);

  //Serial.println(target_greenval);
  //Serial.println(target_redval);
  //Serial.println(target_blueval);
  //Serial.println(target_whiteval);
  //Serial.println("+++++++++++++++");

  // for each color
  for (int v = 0; v < NUM_CHANNELS; v++) {
    if (values[v] < target_values[v]) {
      values[v] += STEP;
      if (values[v] > target_values[v]) {
        values[v] = target_values[v];
      }
    }

    if (values[v] > target_values[v]) {
      values[v] -= STEP;
      if (values[v] < target_values[v]) {
        values[v] = target_values[v];
      }
    }
  }


  // dimming
  if (dimming < target_dimming) {
    dimming += STEP;
    if (dimming > target_dimming) {
      dimming = target_dimming;
    }
  }
  if (dimming > target_dimming) {
    dimming -= STEP;
    if (dimming < target_dimming) {
      dimming = target_dimming;
    }
  }

  /*
    // debug - new values
    Serial.println(greenval);
    Serial.println(redval);
    Serial.println(blueval);
    Serial.println(whiteval);

    Serial.println(target_greenval);
    Serial.println(target_redval);
    Serial.println(target_blueval);
    Serial.println(target_whiteval);
    Serial.println("+++++++++++++++");
  */

  // set actual pin values
  for (int i = 0; i < NUM_CHANNELS; i++) {
    if (isOn) {
      // normal fading
      analogWrite(channels[i], dimming / 100.0 * values[i]);
    } else {
      analogWrite(channels[i], 0);
    }
  }
}

// converts incoming color string to actual (int) values
// ATTENTION this currently does nearly no checks, so the format needs to be exactly like domoticz sends the strings
void inputToRGBW(const char * input) {
  Serial.print("Got color value of length: ");
  Serial.println(strlen(input));

  if (strlen(input) == 6) {
    Serial.println("new rgb value");
    target_values[0] = fromhex (& input [0]);
    target_values[1] = fromhex (& input [2]);
    target_values[2] = fromhex (& input [4]);
    target_values[3] = 0;
  } else if (strlen(input) == 9) {
    Serial.println("new rgbw value");
    target_values[0] = fromhex (& input [1]); // ignore # as first sign
    target_values[1] = fromhex (& input [3]);
    target_values[2] = fromhex (& input [5]);
    target_values[3] = fromhex (& input [7]);
  } else {
    Serial.println("Wrong length of input");
  }


  Serial.print("New color values: ");
  Serial.println(input);

  for (int i = 0; i < NUM_CHANNELS; i++) {
    Serial.print(target_values[i]);
    Serial.print(", ");
  }

  Serial.println("");
  Serial.print("Dimming: ");
  Serial.println(dimming);

}

// converts hex char to byte
byte fromhex (const char * str)
{
  char c = str [0] - '0';
  if (c > 9)
    c -= 7;
  int result = c;
  c = str [1] - '0';
  if (c > 9)
    c -= 7;
  return (result << 4) | c;
}

LastSamurai

@Jan-Gatzke Good job! I have a working 2.0 Version but it lacks your new features. I will take the time and add yours to the code in my git repo :)

Jan Gatzke

@LastSamurai

Thx. Those new features, however, are kind of a workaround. It would have been better if the node could request the V_RGBW value directly. MySensors supports this, but domoticz doesn't seem to. I have testet this and domoticz always returned "0" as value. And because you and me are both using domoticz, I decided to implement this feature using V_VAR1-3.

I am still thinking about the fading. I think we could get better colors if we could compensate the non linear dimming of the LEDs. With the actual sketch colors composed of mid range values could be wrong because every PWM value above 150 or so looks like almost full power. So 00AAFF almost looks like 00FFFF. AA has a value of 170 where FF is 255. This should make a big difference.

Jan Gatzke

I have tried to get some kind of non linear fading by calculating the values for 256 steps using Excel and putting them in an array. The result is pretty good. Please test and share your opinion. ;)

/**
  Based on the MySensors Project: http://www.mysensors.org

  This sketch controls a (analog)RGBW strip by listening to new color values from a (domoticz) controller and then fading to the new color.

  Version 1.1 - Added save/restore of values to/from controller, removed non linear fading code
  Version 1.0 - Changed pins and gw definition
  Version 0.9 - Oliver Hilsky

**/
#define MY_DEBUG

#define SN   "RGBW 01"
#define SV   "1.1"
#define MY_RADIO_NRF24
// change the pins to free up the pwm pin for led control
#define MY_RF24_CE_PIN 4 //<-- NOTE!!! changed, the default is 9
#define MY_RF24_CS_PIN 10 // default is 10
// Set LOW transmit power level as default, if you have an amplified NRF-module and
// power your radio separately with a good regulator you can turn up PA level.
#define MY_RF24_PA_LEVEL RF24_PA_LOW
//Uncomment to enable repeater mode
//#define MY_REPEATER_FEATURE
//Uncomment to assign static node ID
//#define MY_NODE_ID 9


// Load mysensors library
#include <MySensors.h>
// Load Serial Peripheral Interface library
#include <SPI.h>

// Arduino pin attached to driver pins
#define RED_PIN 3
#define WHITE_PIN 9
#define GREEN_PIN 5
#define BLUE_PIN 6
#define NUM_CHANNELS 4 // how many channels, RGBW=4 RGB=3...
#define CHILD_ID 1

// Smooth stepping between the values
#define STEP 1
#define INTERVAL 10

MyMessage lastvalueMsg(CHILD_ID, V_VAR1);
MyMessage lastisonMsg(CHILD_ID, V_VAR2);
MyMessage lastdimmMsg(CHILD_ID, V_VAR3);

// Stores the current color settings
byte channels[4] = {RED_PIN, GREEN_PIN, BLUE_PIN, WHITE_PIN};
byte values[4] = {0, 0, 0, 0};
byte target_values[4] = {0, 0, 0, 0};
//Stores corrected values for each step from 0 to 255. See https://diarmuid.ie/blog/pwm-exponential-led-fading-on-arduino-or-other-platforms/
byte converted_values[256] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,6,6,6,6,6,6,7,7,7,7,7,7,8,8,8,8,8,9,9,9,9,9,10,10,10,10,11,11,11,11,12,12,12,13,13,13,13,14,14,14,15,15,15,16,16,17,17,17,18,18,19,19,20,20,20,21,21,22,22,23,23,24,24,25,26,26,27,27,28,29,29,30,31,31,32,33,34,34,35,36,37,38,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,54,55,56,57,58,60,61,62,64,65,67,68,70,71,73,75,76,78,80,81,83,85,87,89,91,93,95,97,99,101,104,106,108,111,113,116,118,121,123,126,129,132,135,138,141,144,147,150,154,157,161,164,168,171,175,179,183,187,191,195,200,204,209,213,218,223,228,233,238,243,249,255};


// stores dimming level
byte dimming = 100;
byte target_dimming = 100;

// tracks if the strip should be on of off
boolean isOn = false;
// tracks if the strip's last status was off. This overrides isOn at startup
boolean wasOff = true;
//tracks if the old values have bben requested from the controller. This prevents the request from being send multipßle times in the main loop.
boolean valuesrequested = false;
// time tracking for updates
unsigned long lastupdate = millis();

void setup()
{
  // Set all channels to output (pin number, type)
  for (int i = 0; i < NUM_CHANNELS; i++) {
    pinMode(channels[i], OUTPUT);
  }
  // debug
  if (isOn) {
    Serial.println("RGBW is running...");
  }
}

void presentation()  {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo(SN, SV);

  // Register this device as Waterflow sensor
  present(CHILD_ID, S_RGBW_LIGHT, SN, true);
}

void loop()
{
  if (!valuesrequested) {
    // get old values if this is just a restart
    Serial.println("Requesting old values...");
    //Request RGBW values
    request( CHILD_ID, V_VAR1 );
    wait(200);
    //Request Status
    request( CHILD_ID, V_VAR2 );
    wait(200);
    //Request dimm level
    request( CHILD_ID, V_VAR3 );
    valuesrequested = true;
  }

  // set the new light colors
  if (millis() > lastupdate + INTERVAL) {
    updateLights();
    lastupdate = millis();
  }
}

// callback function for incoming messages
void receive(const MyMessage &message) {

  Serial.print("Got a message - ");
  Serial.print("Messagetype is: ");
  Serial.println(message.type);

  // acknoledgment
  if (message.isAck())
  {
    Serial.println("Got ack from gateway");
  }

  // new dim level
  else if (message.type == V_DIMMER or message.type == V_VAR3) {
    Serial.println("Dimming to ");
    Serial.println(message.getString());
    target_dimming = message.getByte();
    send(lastdimmMsg.set(target_dimming));

    if (!wasOff) {
      // a new dimmer value also means on, no seperate signal gets send (by domoticz)
      isOn = true;
      send(lastisonMsg.set(isOn));
    }
  }

  // on / off message
  else if (message.type == V_STATUS or message.type == V_VAR2) {
    Serial.print("Turning light ");

    isOn = message.getInt();

    if (isOn) {
      Serial.println("on");
      wasOff = false;
    } else {
      Serial.println("off");
    }
    send(lastisonMsg.set(isOn));
  }

  // new color value
  else if (message.type == V_RGBW or message.type == V_VAR1) {
    const char * rgbvalues = message.getString();
    send(lastvalueMsg.set(rgbvalues));
    inputToRGBW(rgbvalues);
    if (!wasOff) {
      // a new color also means on, no seperate signal gets send (by domoticz); needed e.g. for groups
      isOn = true;
      send(lastisonMsg.set(isOn));
    }
  }
}

// this gets called every INTERVAL milliseconds and updates the current pwm levels for all colors
void updateLights() {
  int convertedvalue=0;
  // update pin values -debug
  //Serial.println(greenval);
  //Serial.println(redval);
  //Serial.println(blueval);
  //Serial.println(whiteval);

  //Serial.println(target_greenval);
  //Serial.println(target_redval);
  //Serial.println(target_blueval);
  //Serial.println(target_whiteval);
  //Serial.println("+++++++++++++++");

  // for each color
  for (int v = 0; v < NUM_CHANNELS; v++) {
    if (values[v] < target_values[v]) {
      values[v] += STEP;
      if (values[v] > target_values[v]) {
        values[v] = target_values[v];
      }
    }

    if (values[v] > target_values[v]) {
      values[v] -= STEP;
      if (values[v] < target_values[v]) {
        values[v] = target_values[v];
      }
    }
  }


  // dimming
  if (dimming < target_dimming) {
    dimming += STEP;
    if (dimming > target_dimming) {
      dimming = target_dimming;
    }
  }
  if (dimming > target_dimming) {
    dimming -= STEP;
    if (dimming < target_dimming) {
      dimming = target_dimming;
    }
  }

  /*
    // debug - new values
    Serial.println(greenval);
    Serial.println(redval);
    Serial.println(blueval);
    Serial.println(whiteval);

    Serial.println(target_greenval);
    Serial.println(target_redval);
    Serial.println(target_blueval);
    Serial.println(target_whiteval);
    Serial.println("+++++++++++++++");
  */

  // set actual pin values
  for (int i = 0; i < NUM_CHANNELS; i++) {
    if (isOn) {
      // normal fading
      //analogWrite(channels[i], dimming / 100.0 * values[i]);
      //Fading with corrected values see https://diarmuid.ie/blog/pwm-exponential-led-fading-on-arduino-or-other-platforms/
      analogWrite(channels[i], dimming / 100.0 * converted_values[values[i]]);
      
    } else {
      analogWrite(channels[i], 0);
    }
  }
}

// converts incoming color string to actual (int) values
// ATTENTION this currently does nearly no checks, so the format needs to be exactly like domoticz sends the strings
void inputToRGBW(const char * input) {
  Serial.print("Got color value of length: ");
  Serial.println(strlen(input));

  if (strlen(input) == 6) {
    Serial.println("new rgb value");
    target_values[0] = fromhex (& input [0]);
    target_values[1] = fromhex (& input [2]);
    target_values[2] = fromhex (& input [4]);
    target_values[3] = 0;
  } else if (strlen(input) == 9) {
    Serial.println("new rgbw value");
    target_values[0] = fromhex (& input [1]); // ignore # as first sign
    target_values[1] = fromhex (& input [3]);
    target_values[2] = fromhex (& input [5]);
    target_values[3] = fromhex (& input [7]);
  } else {
    Serial.println("Wrong length of input");
  }


  Serial.print("New color values: ");
  Serial.println(input);

  for (int i = 0; i < NUM_CHANNELS; i++) {
    Serial.print(target_values[i]);
    Serial.print(", ");
  }

  Serial.println("");
  Serial.print("Dimming: ");
  Serial.println(dimming);

}

// converts hex char to byte
byte fromhex (const char * str)
{
  char c = str [0] - '0';
  if (c > 9)
    c -= 7;
  int result = c;
  c = str [1] - '0';
  if (c > 9)
    c -= 7;
  return (result << 4) | c;
}

AWI

@Jan-Gatzke for Domoticz you can use V_TEXT. You can request a value and manipulate it in Lua. Also Domoticz is terrible with rgb as it only allows saturated colors.

AWI

@Jan-Gatzke the FastLED library allows for very fast math with color values. Also some very educational stuff for color manipulation in the code and documentation.

💬 OH MySensors RGBW Controller

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