Add TTGO T Journal Camera module & improve commenting (#3515)

Added pinout for TTGO T Journal device and improved the intent of comments.

Author: WizardTim

Diff for: libraries/ESP32/examples/Camera/CameraWebServer/CameraWebServer.ino

@@ -2,16 +2,18 @@
 #include <WiFi.h>
 
 //
-// WARNING!!! Make sure that you have either selected ESP32 Wrover Module,
-//            or another board which has PSRAM enabled
+// WARNING!!! PSRAM IC required for UXGA resolution and high JPEG quality
+//            Ensure ESP32 Wrover Module or other board with PSRAM is selected
+//            Partial images will be transmitted if image exceeds buffer size
 //
 
 // Select camera model
-#define CAMERA_MODEL_WROVER_KIT
-//#define CAMERA_MODEL_ESP_EYE
-//#define CAMERA_MODEL_M5STACK_PSRAM
-//#define CAMERA_MODEL_M5STACK_WIDE
-//#define CAMERA_MODEL_AI_THINKER
+#define CAMERA_MODEL_WROVER_KIT // Has PSRAM
+//#define CAMERA_MODEL_ESP_EYE // Has PSRAM
+//#define CAMERA_MODEL_M5STACK_PSRAM // Has PSRAM
+//#define CAMERA_MODEL_M5STACK_WIDE	// Has PSRAM
+//#define CAMERA_MODEL_AI_THINKER // Has PSRAM
+//#define CAMERA_MODEL_TTGO_T_JOURNAL // No PSRAM
 
 #include "camera_pins.h"
 
@@ -46,7 +48,9 @@ void setup() {
   config.pin_reset = RESET_GPIO_NUM;
   config.xclk_freq_hz = 20000000;
   config.pixel_format = PIXFORMAT_JPEG;
-  //init with high specs to pre-allocate larger buffers
+  
+  // if PSRAM IC present, init with UXGA resolution and higher JPEG quality
+  //                      for larger pre-allocated frame buffer.
   if(psramFound()){
     config.frame_size = FRAMESIZE_UXGA;
     config.jpeg_quality = 10;
@@ -70,13 +74,13 @@ void setup() {
   }
 
   sensor_t * s = esp_camera_sensor_get();
-  //initial sensors are flipped vertically and colors are a bit saturated
+  // initial sensors are flipped vertically and colors are a bit saturated
   if (s->id.PID == OV3660_PID) {
-    s->set_vflip(s, 1);//flip it back
-    s->set_brightness(s, 1);//up the blightness just a bit
-    s->set_saturation(s, -2);//lower the saturation
+    s->set_vflip(s, 1); // flip it back
+    s->set_brightness(s, 1); // up the brightness just a bit
+    s->set_saturation(s, -2); // lower the saturation
   }
-  //drop down frame size for higher initial frame rate
+  // drop down frame size for higher initial frame rate
   s->set_framesize(s, FRAMESIZE_QVGA);
 
 #if defined(CAMERA_MODEL_M5STACK_WIDE)

Diff for: libraries/ESP32/examples/Camera/CameraWebServer/camera_pins.h

@@ -94,6 +94,25 @@
 #define HREF_GPIO_NUM     23
 #define PCLK_GPIO_NUM     22
 
+#elif defined(CAMERA_MODEL_TTGO_T_JOURNAL)
+#define PWDN_GPIO_NUM      0
+#define RESET_GPIO_NUM    15
+#define XCLK_GPIO_NUM     27
+#define SIOD_GPIO_NUM     25
+#define SIOC_GPIO_NUM     23
+
+#define Y9_GPIO_NUM       19
+#define Y8_GPIO_NUM       36
+#define Y7_GPIO_NUM       18
+#define Y6_GPIO_NUM       39
+#define Y5_GPIO_NUM        5
+#define Y4_GPIO_NUM       34
+#define Y3_GPIO_NUM       35
+#define Y2_GPIO_NUM       17
+#define VSYNC_GPIO_NUM    22
+#define HREF_GPIO_NUM     26
+#define PCLK_GPIO_NUM     21
+
 #else
 #error "Camera model not selected"
 #endif