Implemented wired ethernet support

Ethernet.h

@@ -0,0 +1,61 @@
+// Copyright (C) 2024, Mark Qvist
+// 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 <https://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <ETH.h>
+
+SPIClass eth_spi(HSPI);
+bool eth_is_connected = false;
+IPAddress eth_device_ip;
+
+char eth_hostname[10];
+
+void onEthEvent(WiFiEvent_t event) {
+    switch (event) {
+        case ARDUINO_EVENT_ETH_START:
+            memcpy(eth_hostname, bt_devname, 5);
+            memcpy(eth_hostname+5, bt_devname+6, 4);
+            eth_hostname[9] = 0x00;
+            ETH.setHostname(eth_hostname);
+            break;
+        case ARDUINO_EVENT_ETH_GOT_IP:
+            eth_is_connected = true;
+            eth_device_ip = ETH.localIP();
+            break;
+        case ARDUINO_EVENT_ETH_DISCONNECTED:
+        case ARDUINO_EVENT_ETH_STOP:
+            eth_is_connected = false;
+            break;
+        default:
+            break;
+    }
+}
+
+void init_ethernet() {
+    eth_spi.begin(pin_eth_sclk, pin_eth_miso, pin_eth_mosi, pin_eth_cs);
+    WiFi.onEvent(onEthEvent);
+    ETH.begin(
+        ETH_PHY_W5500,
+        0,
+        pin_eth_cs,
+        pin_eth_int,
+        pin_eth_rst,
+        eth_spi,
+        20000000
+    );
+    remote_listener.begin();
+    remote_listener.setTimeout(WR_SOCKET_TIMEOUT);
+    wr_state = WR_STATE_ON;
+}
+
+bool ethernet_is_connected() { return eth_is_connected; }