Seems to be working exactly like this

platformio.ini

@@ -13,11 +13,11 @@ platform = https://github.com/maxgerhardt/platform-raspberrypi.git
 board = pico
 framework = arduino
 platform_packages = 
-	framework-arduinopico@https://github.com/earlephilhower/arduino-pico.git#master
+	framework-arduinopico@https://github.com/earlephilhower/arduino-pico.git#c64a4a58d793ee6d24c7df7ff3ec35adac3bbb45
 board_build.core = earlephilhower
 upload_port = /run/media/amelia/RPI-RP2/
 debug_tool = cmsis-dap
-;upload_protocol = cmsis-dap
+upload_protocol = cmsis-dap
 monitor_speed = 115200
 board_build.filesystem_size = 1m
 board_build.f_cpu = 133000000L

src/config.h

@@ -46,7 +46,7 @@
 #define INT_ETHERNET
 //#define INT_WIFI
 
-#define ETH_SPI_SPD 10000000
+#define ETH_SPI_SPD 64000000
 
 // network and universe settings
 

src/e131.cpp

@@ -32,7 +32,7 @@ const PROGMEM byte E131::ACN_ID[12] = { 0x41, 0x53, 0x43, 0x2d, 0x45, 0x31, 0x2e
 const byte E131::ACN_ID[12] = { 0x41, 0x53, 0x43, 0x2d, 0x45, 0x31, 0x2e, 0x31, 0x37, 0x00, 0x00, 0x00 };
 #endif
 
-Wiznet5500lwIP eth(17, SPI, 21); // 17 : cs, 21 : INTn
+
 
 
 
@@ -125,12 +125,7 @@ int E131::initWiFi(const char *ssid, const char *passphrase) {
     return retval;
 }
 
-void E131::begin(e131_listen_t type, uint16_t universe, uint8_t n) {
+
-    if (type == E131_UNICAST)
-        initUnicast();
-    if (type == E131_MULTICAST)
-        initMulticast(universe, n);
-}
 
 int E131::begin(const char *ssid, const char *passphrase) {
     if (initWiFi(ssid, passphrase)) {
@@ -197,7 +192,7 @@ int E131::beginMulticast(const char *ssid, const char *passphrase,
 #if defined (INT_ETHERNET)
 
 /* Unicast Ethernet Initializers */
-int E131::begin() {
+int E131::begin(Wiznet5500lwIP eth) {
     int retval = 0;
 
     if(ETH_MODE == "staticip") {
@@ -215,7 +210,7 @@ int E131::begin() {
     SPI.setSCK(18);
     SPI.setTX(19);
     eth.setSPISpeed(ETH_SPI_SPD);
-    lwipPollingPeriod(3);
+    lwipPollingPeriod(1);
     
     //char * hostname_char;
     //HOSTNAME.toCharArray(hostname_char, 32);
@@ -248,6 +243,12 @@ int E131::begin() {
     return retval;
 }
 
+void E131::begin(e131_listen_t type, uint16_t universe, uint8_t n) {
+    if (type == E131_UNICAST)
+        initUnicast();
+    if (type == E131_MULTICAST)
+        initMulticast(universe, n);
+}
 
 /* Multicast Ethernet Initializers */
 int E131::beginMulticast(uint8_t *mac, uint16_t universe, uint8_t n) {

src/e131.h

@@ -42,7 +42,7 @@
 //#   define INT_ETHERNET
 
 
-//#define NO_DOUBLE_BUFFER 1
+#define NO_DOUBLE_BUFFER 1
 /* Defaults */
 #define E131_DEFAULT_PORT 5568
 #define WIFI_CONNECT_TIMEOUT 15000  /* 15 seconds */
@@ -187,7 +187,7 @@ class E131 {
 /****** START - Ethernet ifdef block ******/
 #if defined (INT_ETHERNET)
     /* Unicast Ethernet Initializers */
-    int begin();
+    int begin(Wiznet5500lwIP eth);
 
     /* Multicast Ethernet Initializers */
     int beginMulticast(uint8_t *mac, uint16_t universe, uint8_t n = 1);

src/main.cpp

@@ -9,6 +9,8 @@
 #include <FastLED.h>
 #include "config.h"
 #include <EEPROM.h>
+#include <pico/stdlib.h>
+#include <hardware/vreg.h>
 
 int strips[LED_STRIPS] = {170, 170, 170, 170, 170, 170, 170, 170};
 // Begin code
@@ -27,6 +29,7 @@ int universes[LED_STRIPS * 4];
 CRGB ledstrip[MAX_LEDS];
 int pins[8];
 
+uint8_t * livedata;
 // Networking
 
 WebServer httpServer(80);
@@ -40,8 +43,10 @@ String clientbuffer = "";
 String initinfo = "";
 bool debug = 1;
 bool printer = 1;
+int channels = 0;
 // Colors (RGB)
 int bootsel_count = 0;
+int nopackets = 0;
 
 const uint8_t RED[PIXEL_SIZE]= {0x20, 0x00, 0x00};
 const uint8_t ORANGE[PIXEL_SIZE]= {0x20, 0x10, 0x00};
@@ -55,8 +60,10 @@ const uint8_t WHITE[PIXEL_SIZE]= {0x20, 0x20, 0x20};
 #define MAX_PIXELS_PER_UNIVERSE 512 / PIXEL_SIZE  /* Number of pixels */
 #define CHANNEL_START 1 /* Channel to start listening at */
 
+Wiznet5500lwIP eth(17, SPI, 21); //, 21); // 17 : cs, 21 : INTn
 E131 e131;
 
+
 template <class T> T print(T in) {
   Serial.print(String(in));
   if(printer) clientbuffer += String(in);
@@ -212,10 +219,10 @@ void write_universe(long universe, uint8_t data[], long size) {
   PRINTFUNC("Universes size: ");
   PRINTLNFUNC(sizeof(universes));*/
   int write_size = universes[universe];
-  PRINTFUNC("Length: ");
+  /*PRINTFUNC("Length: ");
   PRINTLNFUNC(write_size * PIXEL_SIZE + (CHANNEL_START - 1) + 2);
   PRINTFUNC("Data: ");
-  PRINTLNFUNC(size);
+  PRINTLNFUNC(size);*/
   if (write_size * PIXEL_SIZE + (CHANNEL_START - 1) + 2 > size) {
     println("Write size too big!!");
     return;
@@ -247,12 +254,16 @@ void write_universe(long universe, uint8_t data[], long size) {
 }
 
 void setup() {
+  vreg_voltage v = VREG_VOLTAGE_1_20;
+  vreg_set_voltage(v);
+  set_sys_clock_khz(252000, false);
   Serial.begin(115200);
-  //rp2040.wdt_begin(8000);
+  rp2040.wdt_begin(8000);
   pinMode(24, INPUT); // VBUS detect - check for USB connection
   if (digitalRead(24)) {
     delay(3000); // Wait for serial
   }
+  pinMode(21, INPUT);
   println("\r\nStarting RGB Controller...");
   pinMode(20, OUTPUT);
   println("Resetting W5500 Ethernet Driver...");
@@ -312,10 +323,46 @@ void setup() {
   rp2040.wdt_reset();
 
   println("Configuration loaded.");
-  if (!e131.begin()) {
+
+  if(ETH_MODE == "staticip") {
+    Serial.println("Setting static IP");
+    eth.config(IP_ADDR, INADDR_NONE); 
+  }
+  else {
+    Serial.println(F("Requesting Address via DHCP"));
+  }
+  SPI.setRX(16);
+  SPI.setCS(17);
+  SPI.setSCK(18);
+  SPI.setTX(19);
+  eth.setSPISpeed(ETH_SPI_SPD);
+  lwipPollingPeriod(1);
+  
+  //char * hostname_char;
+  //HOSTNAME.toCharArray(hostname_char, 32);
+  eth.setHostname(HOSTNAME);
+  
+  if (!eth.begin()) {
+    Serial.println("No wired Ethernet hardware detected. Check pinouts, wiring.");
+    println("Connection failed. Retrying.");
+    rp2040.reboot();
+  }
+  int count = 0;
+  while (!eth.connected() && count < 32) {
+    rp2040.wdt_reset();
+    count++;
+    Serial.print(".");
+    delay(250);
+  }
+  if (!eth.connected()) {
     println("Connection failed. Retrying.");
     rp2040.reboot();
   }
+  Serial.print(F("\r\n- IP Address: "));
+  Serial.println(eth.localIP());
+  
+
+  e131.begin(E131_UNICAST);
   #ifdef INT_WIFI
     WiFi.noLowPowerMode();
   #endif
@@ -526,25 +573,33 @@ void setup1() {
 
 void loop() {
   /* Parse a packet */
-  println("Start loop");
+  //println("Start loop");
-  int channels = 0;
+  
   if(channels = e131.parsePacket()) {
     // Offset by start universe
     // as all local functions count from 0
-    status = 0;
+    //delay(0);
-    if(e131.universe > START_UNIVERSE - 1) {
+    livedata = e131.data;
-      while (status2 == 1) {
+    status = 1;
-        delay(0);
+    delayMicroseconds(5000);
+    //Serial.print(eth.isLinked());
+    nopackets = 0;
   }
-      write_universe(e131.universe - START_UNIVERSE, e131.data, channels);
+  else {
-      println("Done Writing");
+    nopackets++;
   }
-    status = 1;
+  if(nopackets > 50000) {
+    nopackets = 0;
+    println("Resetting network");
+    eth.end();
+    delay(5);
+    eth.begin();
+    println("Reset network");
   }
-  println("mid loop");
+  //println("mid loop");
   httpServer.handleClient();
   MDNS.update();
-  println("end loop");
+  //println("end loop");
   if(newconfig == true) {
     println("Waiting for core 1 to idle...");
     ready = 3;
@@ -585,11 +640,16 @@ void loop1() {
     while(ready == 4)
       delay(50);
   }
-  if(status == 1) {
   status2 = 1;
+  if(status == 1 && e131.universe > START_UNIVERSE - 1 && channels > 0) {
+    write_universe(e131.universe - START_UNIVERSE, livedata, channels);
     FastLED.show();
-    status2 = 0;
+    //println("Done Writing");
+    status = 0;
   }
+  
+  status2 = 0;
+  
   if (millis() % 100 > 50) { // reset LED
     digitalWrite(LED_BUILTIN, HIGH);
   }