Writing to Neopixel.

Projects Programming
1

Hi, Im currently working on a project Where i have 1m 60ppm Neopixel that Im controlling with a DMX curcuit. Ive been doing a few Neopixel-projects before and havent been any issues writing static output. But now as Im trying to read the DMX-input and output a single color on a specific diode Im stuck.

This is just a short example from the code:

AnalogWrite(strip1.Color(0, 255, 0, 0), DMXSerial.read(1));

This is supposed to light the first diode in red at the same level as read from DMXSerial 1.

I need help correcting this line to make it work.

Thanks!

2

Perhaps you mean:

strip1.Color(0, DMXSerial.read(1), 0, 0);

or

byte red = DMXSerial.read(1);
strip1.Color(0, red, 0, 0);
3

Post your sketch... snippets are not enough. Explain what it is supposed to do, and what its actually doing, then there's something to go on for suggesting fixes and improvments

4

johnwasser:
Perhaps you mean:

strip1.Color(0, DMXSerial.read(1), 0, 0);

or

byte red = DMXSerial.read(1);

strip1.Color(0, red, 0, 0);

Ah, totally makes sense now that i see it! Thanks!

MarkT:
Post your sketch... snippets are not enough. Explain what it is supposed to do, and what its actually doing, then there's something to go on for suggesting fixes and improvments

#include <DMXSerial.h>
#include <Adafruit_NeoPixel.h>
#define PIXEL_COUNT_OUTPUT1 60
#define PIXEL_PIN 9


Adafruit_NeoPixel strip1 = Adafruit_NeoPixel(PIXEL_COUNT_OUTPUT1, PIXEL_PIN,NEO_GRB + NEO_KHZ800); //Information about the Neopixelstrip.

void setup () {
  DMXSerial.init(DMXReceiver);

  pinMode(PIXEL_PIN,   OUTPUT); // sets the digital pin as output
  
strip1.begin(); //Start sending.
strip1.clear();
strip1.show(); //All pixels at 0.


}


void loop() {

uint32_t red = strip1.Color(255, 0, 0);
uint32_t green = strip1.Color(0, 255, 0);
uint32_t blue = strip1.Color(0, 0, 255);
uint32_t none = strip1.Color(0, 0, 0); //Just some default colors for easy access.

/*strip1.setPixelColor(0, red);
strip1.setPixelColor(1, red);
strip1.setPixelColor(2, red);
strip1.setPixelColor(3, red);
strip1.show();*/


  // Calculate how long no data backet was received
  unsigned long lastPacket = DMXSerial.noDataSince();

  if (lastPacket < 5000) {
    // read recent DMX values and set values.
    
    strip1.Color(0, DMXSerial.read(1), DMXSerial.read(2), DMXSerial.read(3)); //Read DMX Address 1(red), 2(green), 3(blue) at pixel 1.
    strip1.show(); //Send to pixels.
    

  } else {
    // Show red on 3 first pixels when no data was received since 5 seconds or more.
    strip1.Color(0 + 1 + 2, 255, 0, 0);
    strip1.show();
  }
}

Tried to explain the best that i could in the comments, but the idea is to read DMX data on pin 0 and control the neopixel pixel by pixel with the values from dmx. Right now nothing happens. Not even the ELSE statement at the end.

5 
{
    // Show red on 3 first pixels when no data was received since 5 seconds or more.
    strip1.Color(0 + 1 + 2, 255, 0, 0);
    strip1.show();
  }

That is equivalent to:

{
    // Show red on 3 first pixels when no data was received since 5 seconds or more.
    strip1.Color(3, 255, 0, 0);
    strip1.show();
  }

I don't think that will do what you want.

This is more likely to do what the comment says:

{
    // Show red on 3 first pixels when no data was received since 5 seconds or more.
   strip1.setPixelColor(0, red);
   strip1.setPixelColor(1, red);
   strip1.setPixelColor(2, red);
   strip1.show();
  }
6

johnwasser:

{

// Show red on 3 first pixels when no data was received since 5 seconds or more.
    strip1.Color(0 + 1 + 2, 255, 0, 0);
    strip1.show();
  }




That is equivalent to:

{
    // Show red on 3 first pixels when no data was received since 5 seconds or more.
    strip1.Color(3, 255, 0, 0);
    strip1.show();
  }



I don't think that will do what you want.

This is more likely to do what the comment says:

{
    // Show red on 3 first pixels when no data was received since 5 seconds or more.
  strip1.setPixelColor(0, red);
  strip1.setPixelColor(1, red);
  strip1.setPixelColor(2, red);
  strip1.show();
  }

Thanks, ill correct that right away! ;D Right now the ELSE statement works, but cant read from the DMXSerial..

Do i have to declare that its reading from pin 0 somehow? Any other ideas why it doesnt work?

7

Status at the moment, IF statement if running and working. DMX signal is working as it should.

Only problem is the DMXSerial to Neopixel part.

EDIT: Now its working, Simply wrong at the "Strip1.Color". Had to be "Strip1.setPixelColor".

Thanks for all the great help! :slight_smile: