This is an interrupt driven DALI interface for Arduino. It can be used as a master or slave in a DALI Lighting system, for example as a dimmer for LED Panels.

Download the DALI library

The library is capable of running multiple DALI interfaces simultaneously. The example program demonstrates with a DALI Master (interface dali1) sending commands received by the DALI Slave (interface dali2) on a single Arduino.

 

/*###########################################################################
DALI Interface Demo

On the Arduino connect pin18 and pin19 together

Dali interface1 transmit on pin18, interface2 receives on pin19

----------------------------------------------------------------------------
Changelog:
2014-02-07 Created & tested on ATMega328 @ 16Mhz
----------------------------------------------------------------------------
        pq_Dali_Demo.ino

        This program is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 3 of the License, or
        (at your option) any later version.

        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with this program.  If not, see <http://www.gnu.org/licenses/>.

        see http://blog.perquin.com for latest, bugs and info
###########################################################################*/

#include "pq_Dali.h"

//create the DALI interfaces
Dali dali1; 
Dali dali2; 

//callback to handle received data on dali2 interface
void dali2_receiver(Dali *d, uint8_t *data, uint8_t len) {
  Serial.print("RX");
  if(len>=2) Serial.println((int)(data[0]<<8) + data[1]); else  Serial.println((int)data[0]);
}

void setup() {
  Serial.begin(115200);
  Serial.println("DALI Master/Slave Demo");

  //start the DALI interfaces
  //arguments: tx_pin, rx_pin (negative values disable transmitter / receiver)
  dali1.begin(18,-3); 
  dali2.begin(-2,19);

  //attach a received data handler
  dali2.EventHandlerReceivedData = dali2_receiver;
}

uint16_t i=0;

void loop() {
  Serial.print("tx");
  Serial.println(i);
  dali1.sendwait_int(i);
  //delay(200);
  i+=1;
}

5 Responses to “Arduino Dali Interface”

  1. Great! A DALI lib :)
    I was looking for DALI projects but I can only find little to no info on the WWW :/

    I have Xitanium LED drivers here and I try to figure out how to dim the LEDs using a microcontroller.
    There’s no PWM input or something similar which makes it way harder to find a solution, but these power sources have DALI.
    Is it possible to dim the connected LED panel using your lib? Do I need some interface between the Xitanium and the Arduino?
    I’m thankful for any hint!

    Thanks a lot in advance,
    Nik

  2. Very nice library, I was looking for this for a very long time.

    I was wondering if I could ask you for some advice, I’m trying to build a sensor which is a dali slave device. So I could transfer an analog value to the dali master (when asked for), do you perhaps have an idea how to do this?

    Greetings,
    Sven

  3. Nice project! Exactly what i was looking for. Could you post some details about the hardware part? Do you use a boost converter to reach the necessary voltage for DALI?

    Many thanks in advance!

  4. Interesting stuff!

    This really looks worth trying – but how do you physically connect the Arduino to the DALI-bus? Level-shifters? Optocouplers? Amps? Or cables straight to the connector pins?

  5. What hardware interface must be used with Arduino to talk on a DALI bus?

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