Debug Toggle in AP mode (#105)

* #92 Debug Toggle in AP mode
* Re-structure how serial input and debug is handled/setup to allow for expansion

Author: easytarget

app_httpd.cpp

@@ -862,7 +862,7 @@ static esp_err_t dump_handler(httpd_req_t *req){
     int upMin = int64_t(floor(sec/60)) % 60;
     int upSec = sec % 60;
     d+= sprintf(d,"Up: %" PRId64 ":%02i:%02i:%02i (d:h:m:s)<br>\n", upDays, upHours, upMin, upSec);
-    d+= sprintf(d,"Active streams: %i, Previous streams: %lu, Image captured: %lu<br>\n", streamCount, streamsServed, imagesServed);
+    d+= sprintf(d,"Active streams: %i, Previous streams: %lu, Images captured: %lu<br>\n", streamCount, streamsServed, imagesServed);
     d+= sprintf(d,"Freq: %i MHz<br>\n", ESP.getCpuFreqMHz());
     d+= sprintf(d,"Heap: %i, free: %i, min free: %i, max block: %i<br>\n", ESP.getHeapSize(), ESP.getFreeHeap(), ESP.getMinFreeHeap(), ESP.getMaxAllocHeap());
     d+= sprintf(d,"Psram: %i, free: %i, min free: %i, max block: %i<br>\n", ESP.getPsramSize(), ESP.getFreePsram(), ESP.getMinFreePsram(), ESP.getMaxAllocPsram());

esp32-cam-webserver.ino

@@ -179,12 +179,32 @@ const int pwmMax = pow(2,pwmresolution)-1;
 // will be returned for all http requests
 String critERR = "";
 
-// Debug Data for stream and capture
-#if defined(DEBUG_DEFAULT_ON)
-    bool debugData = true;
-#else
-    bool debugData = false;
-#endif
+// Debug flag for stream and capture data
+bool debugData;
+
+void debugOn() {
+    debugData = true;
+    Serial.println("Camera debug data is enabled (send 'd' for status dump, or any other char to disable debug)");
+}
+
+void debugOff() {
+    debugData = false;
+    Serial.println("Camera debug data is disabled (send 'd' for status dump, or any other char to enable debug)");
+}
+
+// Serial input (debugging controls)
+void handleSerial() {
+    if (Serial.available()) {
+        char cmd = Serial.read();
+        if (cmd == 'd' ) {
+            serialDump();
+        } else {
+            if (debugData) debugOff();
+            else debugOn();
+        }
+    }
+    while (Serial.available()) Serial.read();  // chomp the buffer
+}
 
 // Notification LED 
 void flashLED(int flashtime) {
@@ -601,8 +621,11 @@ void setup() {
         Serial.printf("\nCamera Ready!\nUse '%s' to connect\n", httpURL);
         Serial.printf("Stream viewer available at '%sview'\n", streamURL);
         Serial.printf("Raw stream URL is '%s'\n", streamURL);
-        if (debugData) Serial.println("Camera debug data is enabled (send 'd' for status dump, or any other char to disable debug)");
-        else Serial.println("Camera debug data is disabled (send 'd' for status dump, or any other char to enable debug)");
+        #if defined(DEBUG_DEFAULT_ON)
+            debugOn();
+        #else
+            debugOff();
+        #endif
     } else {
         Serial.printf("\nCamera unavailable due to initialisation errors.\n\n");
     }
@@ -621,9 +644,11 @@ void loop() {
     */
     if (accesspoint) {
         // Accespoint is permanently up, so just loop, servicing the captive portal as needed
+        // Rather than loop forever, follow the watchdog, in case we later add auto re-scan.
         unsigned long start = millis();
         while (millis() - start < WIFI_WATCHDOG ) {
             delay(100);
+            handleSerial();
             if (captivePortal) dnsServer.processNextRequest();
         }
     } else {
@@ -640,21 +665,7 @@ void loop() {
             unsigned long start = millis();
             while (millis() - start < WIFI_WATCHDOG ) {
                 delay(100);
-                if (Serial.available()) {
-                    if (Serial.read() == 'd' ) {
-                        serialDump();
-                    } else {
-                        // Toggle debug output on serial input
-                        if (debugData) {
-                            debugData = false;
-                            Serial.println("Camera debug data is disabled (send 'd' for status dump, or any other char to enable debug)");
-                        } else {
-                            debugData = true;
-                            Serial.println("Camera debug data is enabled (send 'd' for status dump, or any other char to disable debug)");
-                        }
-                    }
-                }
-                while (Serial.available()) Serial.read();  // chomp the buffer
+                handleSerial();
             }
         } else {
             // disconnected; attempt to reconnect