fixed serial timeout logic

cubesatsim/esp32-cam-send-jpeg-serial/esp32-cam-send-jpeg-serial.ino

@@ -213,19 +213,20 @@ void loop() {
         
   bool timeout = false; 
   bool take_photo = false;      
+  Serial.println("Checking for serial input before sleeping");      
   unsigned long timer_ms = millis();      
-  while ((Serial.available() < 0) || !timeout) { 
+  while ((Serial.available() < 0) && !timeout) { 
     if ((millis() - timer_ms) > 10000) timeout = true;  // poll serial for 10 seconds
   }
   if (Serial.available() > 0)  {
     char result = Serial.read();
     if ((result == 'f') || (result == 'F')) SPIFFS.format(); 
     take_photo = true;
+    Serial.println("Serial input received!");      
   }
   if (!take_photo) {
-          
+    Serial.println("No serial input received!");               
     esp_sleep_enable_timer_wakeup(5 * 1000000);  // sleep for 10 seconds
- 
     Serial.println("Going to sleep now for 5 seconds");
     Serial.flush(); 
     esp_deep_sleep_start();