updated java example

arduino-example/src/main.cpp

@@ -0,0 +1,77 @@
+//
+// Created by strawmanbobi on 10/14/25.
+//
+
+#include <Arduino.h>
+#include <WiFiS3.h> // Library for the UNO R4 WiFi connectivity
+#include "configure.h" // Your secret credentials file
+
+// --- Global Variables ---
+// Read credentials from the secrets file
+const char ssid[] = SECRET_SSID;
+const char pass[] = SECRET_PASS;
+
+int status = WL_IDLE_STATUS;
+
+// --- Function to print connection details ---
+void printWiFiStatus() {
+  // Print the SSID of the network you're attached to
+  Serial.print("SSID: ");
+  Serial.println(WiFi.SSID());
+
+  // Print the UNO R4's IP address
+  IPAddress ip = WiFi.localIP();
+  Serial.print("IP Address: ");
+  Serial.println(ip);
+
+  // Print the received signal strength (RSSI)
+  long rssi = WiFi.RSSI();
+  Serial.print("Signal Strength (RSSI): ");
+  Serial.print(rssi);
+  Serial.println(" dBm");
+}
+
+// ----------------------------------------------------------------------
+void setup() {
+  Serial.begin(115200);
+  while (!Serial); // Wait for serial port to connect
+
+  Serial.println("--- Arduino UNO R4 WiFi: Station Mode ---");
+
+  // Set the board to Wi-Fi Station (client) mode
+  // The WiFiS3 library handles this mode implicitly with WiFi.begin()
+
+  // Attempt to connect to the Wi-Fi network
+  Serial.print("Attempting to connect to SSID: ");
+  Serial.println(ssid);
+
+  // Connect to the Wi-Fi network
+  // This is a blocking call that retries until a connection is made or times out
+  status = WiFi.begin(ssid, pass);
+
+  if (status == WL_CONNECTED) {
+    // If connected successfully
+    Serial.println("\n✅ Connection Successful!");
+    printWiFiStatus();
+  } else {
+    // If connection failed
+    Serial.print("\n❌ Connection Failed! Status: ");
+    Serial.println(status);
+  }
+}
+
+// ----------------------------------------------------------------------
+void loop() {
+  // Check WiFi status and attempt to reconnect if disconnected
+  if (WiFi.status() != WL_CONNECTED) {
+    Serial.print("Connection lost. Reconnecting...");
+    status = WiFi.begin(ssid, pass);
+    if (status == WL_CONNECTED) {
+      Serial.println("Reconnected!");
+      printWiFiStatus();
+    }
+  }
+
+  // Your main application logic goes here
+  delay(5000);
+}