Add Info Activitiy

src/SystemStatus.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include <Arduino.h>
+#include <WiFi.h>
+
+// Snapshot of device system status, shared between the web server and the
+// System Information activity so both surfaces show consistent data.
+struct SystemStatus {
+  const char* version;
+  std::string ip;
+  std::string wifiMode;  // "STA", "AP", or "Off"
+  int rssi;              // dBm; 0 when not in STA mode
+  std::string macAddress;
+  uint32_t freeHeapBytes;
+  uint32_t uptimeSeconds;
+
+  static SystemStatus collect() {
+    SystemStatus s;
+    s.version = CROSSPOINT_VERSION;
+    s.freeHeapBytes = ESP.getFreeHeap();
+    s.uptimeSeconds = millis() / 1000;
+    s.macAddress = WiFi.macAddress().c_str();
+
+    const wifi_mode_t mode = WiFi.getMode();
+    const bool isAP = (mode == WIFI_MODE_AP) || (mode == WIFI_MODE_APSTA);
+
+    if (isAP) {
+      s.wifiMode = "AP";
+      s.ip = WiFi.softAPIP().toString().c_str();
+      s.rssi = 0;
+    } else if (WiFi.status() == WL_CONNECTED) {
+      s.wifiMode = "STA";
+      s.ip = WiFi.localIP().toString().c_str();
+      s.rssi = WiFi.RSSI();
+    } else {
+      s.wifiMode = "Off";
+      s.ip = "-";
+      s.rssi = 0;
+    }
+
+    return s;
+  }
+};