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ESP8266 DMX Controller - For Dumb RGB 3-channel DMX decoders

dmx
rgb
#1

It’s been a while since I posted a project… so here is one I’ve been working on.

I created a DMX512 Controller for RGB LEDs which runs on a ESP8266.


Additional hardware is required: RGB 3-Chan Decoder and MAX485 Module. I use these 9W RGB lights in my garden powered by a AC240V to DC24V IP67 transformer.
Additional librarys are also required: FastLED and ESPDMX.


Wiring:

ESP8266 GPIO-02 to DI on the MAX485 Module.
Make sure the Module is powered by 5V and is grounded to the ESP8266.
MAX485 Module A output goes to the decoder D+ input
MAX485 Module B output goes to the decoder D- input
The decoders can be chained together by passing the D+/D- to the next decoder. Max 41 decoders.
The decoder outputs to the RGB light’s 4 inputs.


The code isnt perfect, but it works! :slight_smile: I hope that it helps someone on the internet because this code was incredibly hard to figure out myself. haha :smiley:


//#define BLYNK_DEBUG
#define BLYNK_PRINT Serial

#include <ArduinoOTA.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <ESPDMX.h>
#include <FastLED.h>
#include <hsv2rgb.h>
#include <pixeltypes.h>

/*
	  Wifi Credentials
*/
#define WIFI_SSID                   "xxxxxxxxxxxxxxxxxx"
#define WIFI_PASS                   "xxxxxxxxxxxxxxxxxx"

#define AUTH                        "xxxxxxxxxxxxxxxxxx"
#define OTA_HOSTNAME                "DMX-LEDS"
//#define LOCAL_SERVER                IPAddress(192, 168, 1, 2)

#define vPIN_INFO                   V0
#define vPIN_CHAN_SELECT            V1
#define vPIN_CHAN_DISP              V2
#define vPIN_COLOUR_DISPLAY         V3

#define vPIN_HUE                    V11
#define vPIN_SAT                    V12
#define vPIN_BRI                    V13

#define vPIN_GROUP                  V6
#define vPIN_RAINBOW                V7
#define vPIN_RAINBOW_SPEED          V8
#define vPIN_RAINBOW_OFFSET         V9

BlynkTimer timer;
DMXESPSerial dmx;
int varHue = 56, varSat = 255, varBri = 255, varRainbowSpeed = 50, varRainbowOffset = 0, varChan, varTotalChannels = 20, varGroup;
int arrayMemory[20][4];
int timerInfo, TimerHue, TimerRainbow, TimerChan;
String CurrentHexRGB;

void setup() {
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
#ifdef LOCAL_SERVER
  Blynk.begin(AUTH, WIFI_SSID, WIFI_PASS, LOCAL_SERVER, 8080);
#else
  Blynk.begin(AUTH, WIFI_SSID, WIFI_PASS);
#endif
  while (Blynk.connect() == false) {}
  ArduinoOTA.setHostname(OTA_HOSTNAME);
  ArduinoOTA.begin();
  dmx.init();
  timerInfo = timer.setInterval(1000, []() {
    Blynk.virtualWrite(vPIN_INFO, String("WIFI: ") + String(map(WiFi.RSSI(), -105, -40, 0, 100)) + String("% (") + WiFi.RSSI() + String("dB)") + String(" IP: ") + WiFi.localIP().toString() );
  });
  varGroup = 1;
  Blynk.virtualWrite(vPIN_CHAN_DISP, "ALL");
  Blynk.virtualWrite(vPIN_GROUP, 1);
  Blynk.syncVirtual(vPIN_RAINBOW_OFFSET, vPIN_RAINBOW_SPEED, vPIN_RAINBOW);
}

BLYNK_WRITE(vPIN_HUE) {
  varHue = param.asInt();
  ProcessHSV(varChan, varHue, varSat, varBri);
  Blynk.setProperty(vPIN_COLOUR_DISPLAY, "color", CurrentHexRGB);
}

BLYNK_WRITE(vPIN_SAT) {
  varSat = param.asInt();
  ProcessHSV(varChan, varHue, varSat, varBri);
  Blynk.setProperty(vPIN_COLOUR_DISPLAY, "color", CurrentHexRGB);
}

BLYNK_WRITE(vPIN_BRI) {
  varBri = param.asInt();
  ProcessHSV(varChan, varHue, varSat, varBri);
  Blynk.setProperty(vPIN_COLOUR_DISPLAY, "color", CurrentHexRGB);
}

BLYNK_WRITE(vPIN_RAINBOW) {
  if (param.asInt()) {
    varGroup = 1;
    Blynk.virtualWrite(vPIN_CHAN_DISP, "ALL");
    Blynk.virtualWrite(vPIN_GROUP, 1);
    if (timer.isEnabled(TimerRainbow)) timer.disable(TimerRainbow);
    TimerChan = 1;
    TimerHue = arrayMemory[TimerChan - 1][0];
    TimerRainbow = timer.setInterval(varRainbowSpeed, []() {
      TimerHue++;
      if (TimerHue >= 255) TimerHue = 0;
      ProcessHSV(TimerChan, TimerHue, varSat, varBri);
    });
  } else {
    timer.disable(TimerRainbow);
  }
}

BLYNK_WRITE(vPIN_RAINBOW_SPEED) {
  varRainbowSpeed = param.asInt();
  Blynk.syncVirtual(vPIN_RAINBOW);
}

BLYNK_WRITE(vPIN_RAINBOW_OFFSET) {
  varRainbowOffset = param.asInt();
  Blynk.syncVirtual(vPIN_RAINBOW);
}

BLYNK_WRITE(vPIN_CHAN_SELECT) {
  if (!varGroup) {
    varChan = param.asInt();
    Blynk.virtualWrite(vPIN_CHAN_DISP, varChan);
    Blynk.virtualWrite(vPIN_HUE, arrayMemory[varChan - 1][0]);
    Blynk.virtualWrite(vPIN_SAT, arrayMemory[varChan - 1][1]);
    Blynk.virtualWrite(vPIN_BRI, arrayMemory[varChan - 1][2]);
    Blynk.setProperty(vPIN_COLOUR_DISPLAY, "color", CurrentHexRGB);
  } else {
    varChan = 1;
    Blynk.virtualWrite(vPIN_CHAN_DISP, "ALL");
  }
}

BLYNK_WRITE(vPIN_GROUP) {
  varGroup = param.asInt();
  Blynk.syncVirtual(vPIN_CHAN_SELECT);
}

void ProcessHSV(int channel, int hue, int sat, int bri) {
  arrayMemory[channel - 1][0] = hue;
  arrayMemory[channel - 1][1] = sat;
  arrayMemory[channel - 1][2] = bri;
  CHSV hsv(hue, sat, bri);
  CRGB rgb;
  hsv2rgb_spectrum(hsv, rgb);
  CurrentHexRGB = String("#") + String( ( rgb.r << 16) | (rgb.g << 8 ) | rgb.b, HEX);
  if (varGroup) {
    for (int i = 1; i < varTotalChannels; i++) {
      if(varRainbowOffset){
        hue = hue + (varRainbowOffset * i);
        CHSV hsv(hue, sat, bri);
        CRGB rgb;
        hsv2rgb_spectrum(hsv, rgb);
      }
      dmx.write((i * 3) - 2, rgb.r);
      dmx.write((i * 3) - 1, rgb.g);
      dmx.write((i * 3) - 0, rgb.b);
    }
  } else {
    dmx.write((channel * 3) - 2, rgb.r);
    dmx.write((channel * 3) - 1, rgb.g);
    dmx.write((channel * 3) - 0, rgb.b);
  }
}

void loop() {
  Blynk.run();
  ArduinoOTA.handle();
  dmx.update();
  timer.run();
}

—-

Some media


6 Likes

#2

Welcome Back :smiley:

1 Like