added telemetry API endpoint

src/main.cpp

@@ -56,8 +56,14 @@ struct NetworkData {
     String network_name;
 };
 
+struct DeviceTelemetry {
+    float heap_used_percent;
+    int uptime_seconds;
+};
+
 NetworkData wifi_data;
 NetworkData ethernet_data;
+DeviceTelemetry telemetry;
 
 SensorData current_data = SensorData { -1, -1, -1, -1 };
 
@@ -74,7 +80,7 @@ void display_percentage(int percentage)
 {
     digitalWrite(LED_RED, 0);
 
-    if (percentage > 1) {
+    if (percentage > 0) {
         digitalWrite(LED_1, 1);
     } else {
         digitalWrite(LED_1, 0);
@@ -99,7 +105,17 @@ void display_percentage(int percentage)
     } else {
         digitalWrite(LED_5, 0);
     }
+
+    if (percentage > 10) {
         delay(3000);
+    } else if (percentage > 0) {
+        for (int i = 0; i < 3; i++) {
+            delay(500);
+            digitalWrite(LED_1, 0);
+            delay(500);
+            digitalWrite(LED_1, 1);
+        }
+    }
 }
 
 void display_error_code(byte err_code)
@@ -137,7 +153,6 @@ void display_task(void* parameter)
         if (!is_error()) {
             // We have no error, refresh status display and wait half a second
             display_percentage(current_data.percentage);
-            delay(1000);
         } else {
             Log.verbose("Error detected");
             // We have an error, display error code for 3 seconds and then water level for 3 seconds
@@ -215,14 +230,12 @@ void ethernet_task(void* parameter)
 
 void collect_internal_telemetry_task(void* parameter)
 {
-
     while (true) {
         float heap_usage = (float(ESP.getFreeHeap()) / float(ESP.getHeapSize())) * 100;
         uint64_t uptime_seconds = millis() / 1000;
 
-        Log.verbose("Current heap usage: %F", heap_usage);
-        Log.verbose("Current uptime: %d", uptime_seconds);
-
+        telemetry.heap_used_percent = heap_usage;
+        telemetry.uptime_seconds = uptime_seconds;
         delay(60000);
     }
 }
@@ -342,6 +355,15 @@ void setup()
       serializeJson(doc, output);
       request->send(200, "application/json", output); });
 
+    server.on("/telemetry", HTTP_GET, [](AsyncWebServerRequest* request) {
+      StaticJsonDocument<128> doc;
+      doc["uptime_seconds"] = telemetry.uptime_seconds;
+      doc["heap_percent"] = telemetry.heap_used_percent;
+
+      String output;
+      serializeJson(doc, output);
+      request->send(200, "application/json", output); });
+
     server.on("/network_info", HTTP_GET, [](AsyncWebServerRequest* request) {
         StaticJsonDocument<256> doc;
         doc["wifi"]["ip"] = wifi_data.ip_address;
@@ -353,10 +375,10 @@ void setup()
         doc["ethernet"]["rssi"] = ethernet_data.rssi;
         doc["ethernet"]["link"] = ethernet_data.link;
 
-
         String output;
         serializeJson(doc, output);
-    request->send(200, "application/json", output); });
+        request->send(200, "application/json", output);
+    });
 
     server.on("/chota.css", HTTP_GET, [](AsyncWebServerRequest* request) { request->send(SPIFFS, "/chota.css", "text/css", false); });