Initial board setup

platformio.ini

@@ -12,3 +12,8 @@
 platform = raspberrypi
 board = wiznet_5500_evb_pico
 framework = arduino
+lib_deps = 
+	arduino-libraries/Ethernet@^2.0.2
+	knolleary/PubSubClient@^2.8
+	olliiiver/SML Parser@^0.28
+monitor_speed = 115200

src/main.cpp

@@ -0,0 +1,70 @@
+#include <SPI.h>
+#include <Ethernet.h>
+#include <sml.h>
+
+// Blue LED on the W5500-EVB-Pico
+#define LED_PIN 25
+
+/*
+W5500-EVB-Pico Pinout
+I/O	Pin Name	Description
+I	GPIO16	Connected to MISO on W5500
+O	GPIO17	Connected to CSn on W5500
+O	GPIO18	Connected to SCLK on W5500
+O	GPIO19	Connected to MOSI on W5500
+O	GPIO20	Connected to RSTn on W5500
+I	GPIO21	Connected to INTn on W5500
+I	GPIO24	VBUS sense - high if VBUS is present, else low
+O	GPIO25	Connected to user LED
+I	GPIO29	Used in ADC mode (ADC3) to measure VSYS/3
+
+https://docs.wiznet.io/Product/iEthernet/W5500/w5500-evb-pico/
+*/
+#define CS_PIN 17
+
+// Random MAC address with the Wiznet OUI
+static byte mac[] = {0x00, 0x08, 0xDC, 0x4A, 0x2F, 0x7E};
+
+void setup()
+{
+    Serial.begin(115200);
+
+    // Two possible ways to set the pins
+    // TX: GPIO04, RX: GPIO05
+    // TX: GPIO08, RX: GPIO09
+    Serial1.setTX(8);
+    Serial1.setRX(9);
+    // SML baud rate is 9600
+    Serial1.begin(9600);
+
+    // set pin 25 for blinking the LED
+    pinMode(LED_PIN, OUTPUT);
+
+    // Setp the WS5500;
+    Ethernet.init(CS_PIN);
+
+    // start the Ethernet connection and check if DHCP succeeds
+    if (Ethernet.begin(mac) == 0)
+    {
+        while (1)
+        {
+            digitalWrite(LED_PIN, HIGH);
+            delay(100);
+            digitalWrite(LED_PIN, LOW);
+            delay(100);
+        }
+    }
+
+    Serial.print("My IP address: ");
+    Serial.println(Ethernet.localIP());
+}
+
+void loop()
+{
+    if (Serial1.available())
+    {
+        // Read the SML data
+        int data = Serial1.read();
+        Serial.print(data, HEX);
+    }
+}