If no DMX signal is present, a simple rainbow fade is displayed, but that can be changed to whatever you want. Each pixel is given 3 DMX channels; one for red, green and blue. There is a self test function that runs each time the board boots or is reset to make sure your pixels are working. I have a project where I have an Arduino with DMX shield. In the program I have an array of DMX values that I want to set after a button press. The code is working, but I need the values to fade from one to the next over a period of ten seconds. Any ideas how I might make that work? Here is the code below.

To do this, do the following steps: 1. Click on Add Led Strip after entering the website. Click on the added NeoPixel Strip and specify the number of LEDs and Arduino pins. Click on the Add Effect in the loop part and choose an effect. Apply your preferences in the Animation and Color sections. The Arduino DMX shield is an add-on (or 'shield') for the Arduino. It is an easy way to use the Arduino as a DMX-Master device, just by adding the DMX-shield on the top of the Arduino. This arduino DMX / RDM Shield is a low cost high quality solution that allows you to connect your Arduino driven artwork into DMX512 networks. 4 digit 7-segment multiplexed LED display of DMX channel or current program. Unique control interface consisting of a button and potentiometer. 5-channel DMX operation: mode, master intensity and 3 color channels. 4 programs in addition to DMX operation: Manual color, strobe, sequential fade, random fade. EEPROM storage of DMX address and program.

This is a do-it-yourself construction manual for a simple USB interface to control a DMX512 lighting bus.

The basic part is an Arduino Micro module, completed with a minimum number of additional components. The PCB layout is optimized for straightforward reproduction on a Veroboard.
An Arduino Leonardo can be completed with a DMX transmitter even more simply (see below). The firmware is the same for both models.

Due to the limited SRAM size of the ATmega32U4 microcontroller (the soft fade feature needs a lot), the number of accessible DMX channels is max.256. Because this firmware makes use of the ATmega Boot Section, it can only be programmed with an external ISP programmer, not with a bootloader.

Three different command sets are selectable by a jumper or switch:

• RS-232 compatible ASCII commands. The microcontroller is configured as USB Communication Device (CDC/ACM class) and is seen as a virtual COM port by the host.
• The widely known and implemented MiniDMX protocol developed by Mathias Dzionsko.
  Formally this is implemented here as ASCII command 'Z' (hex 5A). This letter is the header byte of each MiniDMX data packet. So when it gets received, the microcontroller jumps into the corresponding decoder routine and returns back to the ASCII command mode after the MiniDMX packet is processed. Fade processes, prestored lighting scenes and the chaser are not supported by the MiniDMX protocol. But it is compatible with the free software DMXControl3 (used for test here) and Freestyler.
  Unfortunately the original website with the MiniDMX specification is not online anymore.
• or by MIDI channel messages. The microcontroller is configured for USB MIDI Streaming class and is seen as a virtual MIDI port by the host. This way DMX is controlled easily by a MIDI sequencer or other musicians tools.

An alternative firmware is available for download, which supports the MiniDMX protocol for 512 DMX channels with no special features else.
It is implemented instead of the MIDI command set. The ASCII command set (more features but 256 channels) is the same as described above and selectable by a jumper or switch. In both positions, the microcontroller is configured as USB Communication Device (CDC/ACM class) and is seen as a virtual COM port by the host.

Assembly of the Arduino Leonardo version (schematic see manual):

When the orange jumper (connects IO9 with Ground) is set, USB is configured as a virtual serial port and the ASCII/MiniDMX command set is active.
When it is removed, USB starts as virtual MIDI interface with the MIDI command set (or 512 channels MiniDMX, depending on the installed firmware version).
The black wire is Ground, the white wire is +5V. The grey wire sends DMX from Arduino TX (D1), the violet wire (D2) disables the DMX transmitter during USB enumeration.
Connections are made with 2.54mm pinheads, nothing is soldered at the Arduino.

Downloads:
The subsequently downloadable material is copyrighted (c)2015-17 by Wolfgang Schemmert.
Assembly and use of the interface is permitted for free by everybody for any purpose ('freeware')
The MiniDMX firmware is provided under 'Creative Commons 3.0 DE License'
All information is based on best knowledge, but without any warranty. Any responsibility is excluded.

Veroboard and PCB layout for Arduino Micro
(1:1 TIF format. BOTTOM layer as well as component placement view are 'from component side', i.e. BOTTOM layer shown mirrored 'through the PCB' (as needed for PCB production))

Detailled solder side view for Arduino Micro
(JPEG, not scaled)

Arduino Dmx Faded Glory

Detailled solder side view for Arduino Leonardo
(JPEG, not scaled)

Standard Firmware: MIDI or ASCII text command set (256 DMX channels) selectable.
Hex code for Arduino Micro and Leonardo
(version 1.11 , 08 January 2017)
recommended Fuses configuration: extended 0xF9, high 0xCF, low 0xFF)

Alternative Firmware: MiniDMX (512 DMX channels) or ASCII command set (256 DMX channels) selectable.
Hex code for Arduino Micro and Leonardo
(version 1.11 , 08 January 2017)
(recommended Fuses configuration: extended 0xF9, high 0xCF, low 0xFF)

Both firmware versions work unmodified with Arduino Leonardo, but in default state get recognized as Arduino Micro. The USB Vid/Pid can be changed by the user. The LED of the Micro version is doubled at the Leonardo onboard TX led with the difference that is off during idle state and goes on when data are transferred.

Hi Guys,

Arduino Dmx Decoder

i’m quite new in Arduino but getting along with it pretty well.

Currently i’m working on a simple project.

If the trigger (dry contact input) is high the lights should fade in and stay on.
if the input goes low the lights should fade out and stay out.

I’ve worked with DmxSimple to create the project. However, DmxSimple is always fading on and off.
I’m search for a solution to make one single fade(instead of on/off/on/off/on/off) after the fade the light should stay until the situation changes.

Here is my code so far, please notice this is for 2 lamps (if input is high one light should fade in and the other should fade out. If input is low then the other way around.)

Arduino Dmx Faded

/* Doloris door-fade(3x horizontal doors)
*
*

Arduino Dmx Fade Code

• Function of showfile
• input in door detects situation (open or closed)
• When door opens full a sensor (buttonPin2) is triggered.
• When triggered; one light will fade off and the other will turn on.
• end *
  */

#include <DmxSimple.h>
const int buttonPin = 2;
int buttonState = 0;

void setup() {
DmxSimple.usePin(3);
DmxSimple.maxChannel(3);
Serial.begin(9600);
pinMode(buttonPin, INPUT);

}

void loop() {
buttonState = digitalRead(buttonPin);
int brightness;

Arduino Dmx Code

if (buttonState HIGH) {
for(brightness = 0; brightness <= 255; brightness++){
DmxSimple.write(1, 50);
delay (10);
}
for(brightness = 255; brightness >= 0; brightness–) {
DmxSimple.write(2, 0);
delay(10);
}
}
else {
for(brightness = 0; brightness <= 255; brightness++){
DmxSimple.write(2, 50);
delay (10);
}
for(brightness = 255; brightness >= 0; brightness–) {
DmxSimple.write(1, 0);
delay(10);
}
}
}