Switch from hex to normal RGB

[moskovskiy82]

Currently have the following code (at the bottom - removed everything irrelevant) - followed by the examples on this great board which receives hex. Not very strong at programming and need to switch to receiving values like /36/0/1/0/40 249,255,218
Just do not know how to change the setColor(String hexstring) function

OLD CODE:

long RGB_values[3] = {0,0,0};
String hexstring;

int RValue;
int GValue;
int BValue;
int CurrentLevel;

void before() 
{
pinMode(RED_PIN, OUTPUT);
pinMode(GREEN_PIN, OUTPUT);
pinMode(BLUE_PIN, OUTPUT);
TCCR2A = _BV(COM2A1) | _BV(COM2B1) | _BV(WGM21) | _BV(WGM20);
}

void receive(const MyMessage &message) {
if (message.type==V_RGB)
{
	hexstring = message.getString();
	Serial.print("RGB command: ");
	Serial.println(hexstring);
	setColor(hexstring);
}
  else if (message.type==V_PERCENTAGE)
{
int dimLevel = message.getInt(); //0-100%
Serial.print("Dim command: ");
Serial.println(dimLevel);
setDimLevel(dimLevel);
saveState(SAVE_DIMMER_LEVEL, dimLevel);
}
else if (message.type==V_STATUS)
{
	if(message.getBool() == RELAY_ON)
	{
	setColor("FFF1E0");
	saveState(SAVE_LIGHT_STATE, RELAY_ON);
	}
	if(message.getBool() == RELAY_OFF)
	{
	analogWrite(RED_PIN, 0);
	analogWrite(GREEN_PIN, 0);
	analogWrite(BLUE_PIN, 0);
	saveState(SAVE_LIGHT_STATE, RELAY_OFF);
	}
}

}

void setDimLevel(int level) 
{
level = level > 100 ? 100 : level;
level = level < 0 ? 0: level;
int delta = ( level - CurrentLevel) < 0 ? -1 : 1;
RValue = (int)(level / 100. * RValue);
BValue = (int)(level / 100. * BValue);
GValue = (int)(level / 100. * GValue);
analogWrite(RED_PIN, RValue);
analogWrite(GREEN_PIN, GValue);
analogWrite(BLUE_PIN, BValue);
CurrentLevel = level;
}
void setColor(String hexstring) 
{
long number = (long) strtol( &hexstring[0], NULL, 16);
Serial.print("Color long: ");
Serial.println(number);
RValue = number >> 16;
GValue = number >> 8 & 0xFF;
BValue = number & 0xFF;
Serial.print("Color: ");
Serial.println(hexstring);
Serial.print("Red: ");
Serial.println(RValue);
Serial.print("Green: ");
Serial.println(GValue);
Serial.print("Blue: ");
Serial.println(BValue);
analogWrite(RED_PIN, RValue);
analogWrite(GREEN_PIN, GValue);
analogWrite(BLUE_PIN, BValue);
}

[Boots33]

@moskovskiy82 Not totally sure what you need but if you have a look at my setcolor function in this post it uses RGB values to change the colours. Is that what you meant?

[moskovskiy82]

Not exactly...
Here we are awaiting a hex value

void receive(const MyMessage &message) {
if (message.type==V_RGB)
 {
hexstring = message.getString();
....

And than process those to rgb values. But if via MQTT we will receive RGB values like 243,145,156 and not hex - how to change the code accordingly?

[mortommy]

Hi,
you can try this:

if (message.type==V_RGB)
{
      char convBuffer[8];
      hexstring = strtol(message.getString(convBuffer),0,16);
      Serial.println(hexstring);
      r=(int)(hexstring>>16);
      g=(int)(hexstring>>8)& 0xFF;
      b=(int)(hexstring)& 0xFF;
}

Hope it helps.

[Boots33]

@moskovskiy82 I have not used MQTT so am not sure how it sends the data. Does it still send it as V_RGB ? if it does then you will need to parse the data to split it into the three separate values . Do a google search for: Arduino parse comma delimited string and you will see what is needed.

[moskovskiy82]

Sorry tp bump an old one but still haven't found a solution.
MQTT passes it as
mys-in/36/0/1/0/40 255,85,73

So the message payload can be passed directly to arduino as PWM values