coding help

hello Im looking for help this code was written with a older version of the Arduino IDE I wanted to up date it but i keep getting this error.

static void udpServerListenOnPort(UdpServerCallback callback, uint16_t port);


exit status 1
invalid conversion from ‘void ()(word, byte, const char*, word) {aka void ()(unsigned int, unsigned char, const char*, unsigned int)}’ to ‘UdpServerCallback {aka void ()(unsigned int, unsigned char, unsigned int, const char*, unsigned int)}’ [-fpermissive]

here is the code Im using

// E1.31 Receiver and pixel controller by Andrew Huxtable (
// This code may be freely distributed and used as you see fit for non-profit
// purposes and as long as the original author is credited and it remains open
// source
// The ethernet module is an ENC28J60 based item which are easily available
// for a few $
// Data connections to the module:
// Module → Arduino
// SI → 11
// SO → 12
// SCK → 13
// CS → 8
// NB Most of the modules run on 3.3v, not 5v - Use caution! 5V logic/data is fine though.
// Please configure your Lighting product to use Unicast to the IP the device is given from your DHCP server
// Multicast is not currently supported due to bandwidth/processor limitations

// You will need the Ethercard and FastLed Libraries from:
// Releases · FastLED/FastLED · GitHub
// The Atmega328 only has 2k of SRAM. This is a severe limitation to being able to control large
// numbers of smart pixels due to the pixel data needing to be stored in an array as well as
// a reserved buffer for receiving Ethernet packets. This code will allow you to use a maximum of 240 pixels
// as that just about maxes out the SRAM on the Atmega328.

// There is deliberately no serial based reporting from the code to conserve SRAM. There is a little
// bit available if you need to add some in for debugging but keep it to an absolute minimum for debugging
// only.

#include <EtherCard.h>
#include “FastLED.h”
//#include <avr/wdt.h>


// enter desired universe and subnet (sACN first universe is 1)
#define DMX_SUBNET 0
#define DMX_UNIVERSE 9 //Start universe

// Set a different MAC address for each…
const byte mymac = { 0x74, 0x69, 0x69, 0x2D, 0x30, 0x17 };

// Uncomment if you want to use static IP
// ethernet interface ip address
static byte myip = { 10,0,0,17};

// By sacrificing some of the Ethernet receive buffer, we can allocate more to the LED array
// but this is technically slower because 2 packets must be processed for all 240 pixels.

/// DONT CHANGE unless you know the consequences…
#define CHANNEL_COUNT 360 //because it divides by 3 nicely
#define NUM_LEDS 240 // can not really go higher than this - Runs out of SRAM

// The pin the data line is connected to for WS2812b
#define DATA_PIN 7


unsigned long lastUpdate;

// Define the array of leds

byte Ethernet::buffer[ETHERNET_BUFFER]; // tcp/ip send and receive buffer

int checkACNHeaders(const char* messagein, int messagelength) {
lastUpdate = millis();
//Do some VERY basic checks to see if it’s an E1.31 packet.
//Bytes 4 to 12 of an E1.31 Packet contain “ACN-E1.17”
//Only checking for the A and the 7 in the right places as well as 0x10 as the header.
//Technically this is outside of spec and could cause problems but its enough checks for us
//to determine if the packet should be tossed or used.
//This improves the speed of packet processing as well as reducing the memory overhead.
//On an Isolated network this should never be a problem…
//for (int i=0;i<125;i++){
// Serial.print(messagein*);*

  • //}*
  • if ( messagein[1] == 0x10 && messagein[4] == 0x41 && messagein[12] == 0x37) { *
    _ int addresscount = (byte) messagein[123] * 256 + (byte) messagein[124]; // number of values plus start code_
  • if ( addresscount > 0){*
  • //Serial.println(addresscount - 1);*
  • return addresscount -1; //Return how many values are in the packet.*
  • }*
  • }*
  • return 0;*

void sacnDMXReceived(const char* pbuff, int count) {
_ //Serial.println("*");_

  • if (count > CHANNEL_COUNT) count = CHANNEL_COUNT;*

  • byte b = pbuff[113]; //DMX Subnet*

  • if ( b == DMX_SUBNET) {*

  • b = pbuff[114]; //DMX Universe*

  • if ( b >= DMX_UNIVERSE && b <= DMX_UNIVERSE + UNIVERSE_COUNT ) { *

  • if ( pbuff[125] == 0 ) { //start code must be 0*
    int ledNumber = (b - DMX_UNIVERSE) * LEDS_PER_UNIVERSE;

  • // sACN packets come in seperate RGB but we have to set each led’s RGB value together*

  • // this ‘reads ahead’ for all 3 colours before moving to the next led.*

  • for (int i = 126;i < 126+count;i = i + 3){*
    _ byte charValueR = pbuff*;_
    byte charValueG = pbuff[i+1];_
    byte charValueB = pbuff[i+2];_
    _; //Do it!_

void sACNPacket(word port, byte ip[4], const char *data, word len) {
* //Make sure the packet is an E1.31 packet*
_ //Serial.println("");_
int count = checkACNHeaders(data, len);_
if (count){_
// It is so process the data to the LEDS*_
* //Serial.println(count);*
* sacnDMXReceived(data, count);*
* }*

void initTest() //runs at board boot to make sure pixels are working
* LEDS.showColor(CRGB(255, 0, 0)); //turn all pixels on red*
* delay(1000);*
* LEDS.showColor(CRGB(0, 255, 0)); //turn all pixels on green*
* delay(1000);*
* LEDS.showColor(CRGB(0, 0, 255)); //turn all pixels on blue*
* delay(1000);*
* LEDS.showColor(CRGB(0, 0, 0)); //turn all pixels off*

void setup() {
* // Using different LEDs or colour order? Change here…*
_ // *******************************************************_
FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, NUM_LEDS); *

_ // ********************************************************_

* //Serial.begin(115200);*
* //Serial.println(“Init.”);*
* // No checks in here to ensure Ethernet initiated properly.*
* // Make sure Ethernet cable is connected and there is DHCP on the network if you are using it …*
// if (ether.begin(sizeof Ethernet::buffer, mymac, 8) == 0){
// Serial.println( “Failed to access Ethernet controller”);
// } else {
// Serial.println(“Ethernet ok”);
// }
* ether.begin(sizeof(Ethernet::buffer), mymac, 8);*
_// ******************************************************** _
* // DHCP*
* //ether.dhcpSetup();*

* //Static IP*
* ether.staticSetup(myip);*
// ********************************************************

* // Register listener*
* ether.udpServerListenOnPort(&sACNPacket, 5568);*

* //Once the Ethernet is initialised, run a test on the LEDs*
* // If you have problems with lockups/reboots, you might want to disable this*
* //initTest();*

* lastUpdate = millis();*

void loop() {
* //Process packets*
* if (millis() - lastUpdate > 2000){*
* // If no packet recieved in 2 seconds, reboot.*
* // I had problems with occational lockups of controllers*
* // for some reason. Slowing the data rate seemed to help.*
* // ENC28J60 module probably isnt coping too well.*
* asm volatile (" jmp 0");*
* }*
* ether.packetLoop(ether.packetReceive());*

The error message say that this function:

void sACNPacket(word port, byte ip[4], const char *data, word len)

... has the wrong number/types of arguments.

It is this:

aka void (*)(unsigned int, unsigned char*, const char*, unsigned int)

but it should be this:

void (*)(unsigned int, unsigned char*, unsigned int, const char*, unsigned int)

I guess the library you're using was updated.
Look in the .h file of your library to see how 'UdpServerCallback' is now defined.

thank you thank you !!!

This is brilliant work
I am currently working on an ArtNet/Enc28j60/WS2812 device in a Nano
I think I have found a way of getting more DMX channels

I wrote a simple bit of assembler that will shuffle out a whole universe to WS2812's, this then does not rely on the fastLED or Neopixel libraries, or indeed the data array formatting

So what I am doing is..
Capture second universe, and place into an array
Capture first universe, and immediately use the data that is in the buffer to start writing to the WS
Once the 'buffer data' data has been output, I append the second universe array onto the end

This will then allow me to get 1024 bytes out in a sequence, from Artnet packets

I am also writing a full IP & Config set up which resides in the Nano and is served to a browser, after which the Nano then become the Client streaming the WS output

There is still much to do


shanebou24, dod you solve the compile issues as I couldnt get it to compile on mine

Hey Mcnoby were you able to get the art net program to run on your nano? if so can you share you're code. I've been struggling with the same.

Can you please post the proper coding and instruction please?