introduce basic system status page

src/SystemStatus.cpp

@@ -0,0 +1,24 @@
+#include <SystemStatus.h>
+
+ SystemStatus::SystemStatus(AsyncWebServer *server) : _server(server) {
+  _server->on(SYSTEM_STATUS_SERVICE_PATH, HTTP_GET, std::bind(&SystemStatus::systemStatus, this, std::placeholders::_1));
+}
+
+ void SystemStatus::systemStatus(AsyncWebServerRequest *request) {
+  AsyncJsonResponse * response = new AsyncJsonResponse(MAX_ESP_STATUS_SIZE);
+  JsonObject root = response->getRoot();
+#if defined(ESP8266)
+  root["esp_platform"] = "esp8266";
+#elif defined(ESP_PLATFORM)
+  root["esp_platform"] = "esp32";
+#endif
+  root["cpu_freq_mhz"] = ESP.getCpuFreqMHz();  
+  root["free_heap"] = ESP.getFreeHeap();
+  root["sketch_size"] = ESP.getSketchSize();
+  root["free_sketch_space"] = ESP.getFreeSketchSpace();
+  root["sdk_version"] = ESP.getSdkVersion();
+  root["flash_chip_size"] = ESP.getFlashChipSize();
+  root["flash_chip_speed"] = ESP.getFlashChipSpeed();
+  response->setLength();
+  request->send(response);
+}

src/SystemStatus.h

@@ -0,0 +1,33 @@
+#ifndef SystemStatus_h
+#define SystemStatus_h
+
+#if defined(ESP8266)
+  #include <ESP8266WiFi.h>
+  #include <ESPAsyncTCP.h>
+#elif defined(ESP_PLATFORM)
+  #include <WiFi.h>
+  #include <AsyncTCP.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+#include <ArduinoJson.h>
+#include <AsyncArduinoJson6.h>
+
+#define MAX_ESP_STATUS_SIZE 1024
+#define SYSTEM_STATUS_SERVICE_PATH "/rest/systemStatus"
+
+class SystemStatus {
+
+  public:
+
+    SystemStatus(AsyncWebServer *server);
+
+  private:
+
+    AsyncWebServer* _server;
+
+    void systemStatus(AsyncWebServerRequest *request);
+
+};
+
+#endif // end SystemStatus_h

src/main.cpp

@@ -21,7 +21,7 @@
 #include <WiFiStatus.h>
 #include <NTPStatus.h>
 #include <APStatus.h>
-
+#include <SystemStatus.h>
 
 #define SERIAL_BAUD_RATE 115200
 
@@ -39,6 +39,7 @@ WiFiScanner wifiScanner = WiFiScanner(&server);
 WiFiStatus wifiStatus = WiFiStatus(&server);
 NTPStatus ntpStatus = NTPStatus(&server);
 APStatus apStatus = APStatus(&server);
+SystemStatus systemStatus = SystemStatus(&server);
 
 void setup() {
     // Disable wifi config persistance