remove filesystem saving; remove unneeded includes

src/main.cpp

@@ -1,13 +1,8 @@
 #include "WebServer.h"
 #include "WiFi.h"
 #include "esp_camera.h"
-#include "esp_timer.h"
-#include "img_converters.h"
-#include "Arduino.h"
 #include "soc/soc.h"           // Disable brownout problems
 #include "soc/rtc_cntl_reg.h"  // Disable brownout problems
-#include "driver/rtc_io.h"
-#include <LittleFS.h>
 
 // OV2640 camera module pins (CAMERA_MODEL_AI_THINKER)
 #define PWDN_GPIO_NUM     32
@@ -34,9 +29,6 @@ const char* password = "...";
 // Create AsyncWebServer object on port 80
 WebServer server(80);
 
-// Photo File Name to save in LittleFS
-#define FILE_PHOTO "/photo.jpg"
-
 //LED flash setup parameters - the LED flash illuminates the meter when the photo is taken
 const int freq = 5000;
 const int ledChannel = 2;  // Timer 0 is used to generate the camera pixel clock
@@ -45,61 +37,6 @@ const int res = 8;         // select 8-bit resolution
 const int ledPin = 4;      // the flash LED is connected to pin 4
 const int brightness = 255; // set the led PWM ( 0 - 255 )
 
-void captureAndSave( void ) {
-  camera_fb_t * fb = NULL;
-  bool ok = 0;
-
-  do {
-    // Take a photo with the camera
-    Serial.println("Taking a photo...");
-
-    // Dump first frame
-    fb = esp_camera_fb_get();
-    esp_camera_fb_return(fb);
-    fb = NULL;
-
-    // Configure and turn on the LED flash
-    ledcAttachPin(ledPin, ledChannel);
-    ledcSetup(ledChannel, freq, res);  
-    ledcWrite(ledChannel, brightness);
-    delay(1);
-
-    fb = esp_camera_fb_get();
-
-    // Turn off the LED flash
-    ledcWrite(ledChannel, 0);
-    ledcDetachPin(ledPin);
-
-    if (!fb) {
-      Serial.println("Camera capture failed");
-      return;
-    }
-
-    // Photo file name
-    File file = LittleFS.open(FILE_PHOTO, FILE_WRITE);
-
-    // Insert the data in the photo file
-    if (!file) {
-      Serial.println("Failed to open file in writing mode");
-    }
-    else {
-      file.write(fb->buf, fb->len); // payload (image), payload length
-      Serial.println("Photo saved");
-    }
-    // Close the file
-    file.close();
-    esp_camera_fb_return(fb);
-
-    // check if file has been correctly saved in LittleFS
-    File f_pic = LittleFS.open( FILE_PHOTO );
-    unsigned int pic_sz = f_pic.size();
-    Serial.print("Saved file is ");
-    Serial.print(pic_sz);
-    Serial.println(" bytes");
-    pic_sz > 100 ? ok = true : ok = false;
-  } while ( !ok );
-}
-
 void setup() {
   Serial.begin(115200);
 
@@ -109,14 +46,6 @@ void setup() {
     delay(1000);
     Serial.println("Connecting to WiFi...");
   }
-  if (!LittleFS.begin(true)) {
-    Serial.println("An Error has occurred while mounting LittleFS");
-    ESP.restart();
-  }
-  else {
-    delay(500);
-    Serial.println("LittleFS mounted successfully");
-  }
 
   // Print ESP32 Local IP Address
   Serial.print("IP Address: http://");
@@ -159,14 +88,32 @@ void setup() {
     ESP.restart();
   }
 
+  // Take and send a picture when a client requests "/"
   server.on("/", HTTP_GET, []() {
-    captureAndSave();
-    File file = LittleFS.open(FILE_PHOTO);
-    server.streamFile(file, "image/jpeg");
-    file.close();
+    camera_fb_t * fb = NULL;
+
+    // Dump first frame due to framebuffer issues 
+    fb = esp_camera_fb_get();
+    esp_camera_fb_return(fb);
+    fb = NULL;
+
+    // Configure and turn on the LED flash
+    ledcAttachPin(ledPin, ledChannel);
+    ledcSetup(ledChannel, freq, res);  
+    ledcWrite(ledChannel, brightness);
+    delay(1);
+
+    fb = esp_camera_fb_get();
+
+    // Turn off the LED flash
+    ledcWrite(ledChannel, 0);
+    ledcDetachPin(ledPin);
+
+    server.send_P(200, "image/jpeg", (char *) fb->buf, fb->len);
+
+    esp_camera_fb_return(fb);
   });
 
-  // Start server
   server.begin();
 }