show debug only if flag

the-cup.ino

@@ -69,10 +69,12 @@ void read_card(char reader_uid[]);
 void send_uid(char reader_uid[]);
 
 void setup() {
+  #ifdef DEBUG
     Serial.begin(115200);
     while (!Serial) delay(10);
     Serial.print("Nb cycles: ");
     Serial.println(nbCycles++);
+  #endif
 
   pinMode(RC522_POWER_PIN, OUTPUT);
   digitalWrite(RC522_POWER_PIN, HIGH);
@@ -96,7 +98,9 @@ void readCard(char reader_uid[]) {
   reader.PICC_HaltA();
   reader.PCD_StopCrypto1();
   byte_to_string(reader.uid.uidByte, 4, reader_uid);
+  #ifdef DEBUG
     Serial.println(reader_uid);
+  #endif
   displaySuccess();
 }
 
@@ -111,42 +115,56 @@ void connectToWifi() {
   res = wm.autoConnect("KLUK"); // password protected ap
 
   if(!res) {
+    #ifdef DEBUG
       Serial.println("Failed to connect");
+    #endif
     displayError();
     // ESP.restart();
   } 
   else {
     //if you get here you have connected to the WiFi    
+    #ifdef DEBUG
     Serial.println("connected...yeey :)");
+    #endif
   }
 }
 void postUid(char reader_uid[]) {
   NetworkClientSecure *client = new NetworkClientSecure;
   client->setCACert(rootCACertificate);
   HTTPClient https;
+  #ifdef DEBUG
     Serial.print("[HTTPS] begin...\n");
+  #endif
   // configure traged server and url
   https.begin("https://mood.robiweb.net/rfid_tags");  // HTTP
   https.addHeader("Content-Type", "application/json");
 
   // start connection and send HTTP header and body
   int httpCode = https.POST("{\"identifier\":\"" + String(reader_uid) + "\"}");
+  #ifdef DEBUG
     Serial.print("httpCode: ");
     Serial.println(httpCode);
+  #endif
 
   if (httpCode > 0) {
     if (httpCode == HTTP_CODE_CREATED) {
     } else {
+      #ifdef DEBUG
         Serial.println("Remote error while sending uid");
+      #endif
       displayError();
     }
   } else {
+      #ifdef DEBUG
         Serial.print("Remote error while sending uid");
+      #endif
       displayError();
   }
 
   https.end();
+  #ifdef DEBUG
     Serial.print("[HTTPS] ended...\n");
+  #endif
 }
 
 void byte_to_string(byte array[], unsigned int len, char buffer[]) {