diff --git a/the-cup.ino b/the-cup.ino
index 82dc3ac..4f1bbea 100644
--- a/the-cup.ino
+++ b/the-cup.ino
@@ -62,10 +62,11 @@ void loop() {
   auto client = std::make_unique<BearSSL::WiFiClientSecure>();
 
   if (reader.PICC_IsNewCardPresent() && reader.PICC_ReadCardSerial()) {
-    // Halt PICC.
     reader.PICC_HaltA();
-    // Stop encryption on PCD.
     reader.PCD_StopCrypto1();
+    char reader_uid[32] = "";
+    byte_to_string(reader.uid.uidByte, 4, reader_uid);
+    Serial.println(reader_uid);
 
     client->setInsecure();
     HTTPClient https;
@@ -74,18 +75,12 @@ void loop() {
     https.begin(*client, "https://mood.robiweb.net/rfid_tags");  // HTTP
     https.addHeader("Content-Type", "application/json");
 
-    char str[32] = "";
-    array_to_string(reader.uid.uidByte, 4, str); //Insert (byte array, length, char array for output)
-    Serial.println(str); //Print the output uid string
     // start connection and send HTTP header and body
-    int httpCode = https.POST("{\"identifier\":\"" + String(str) + "\"}");
+    int httpCode = https.POST("{\"identifier\":\"" + String(reader_uid) + "\"}");
     Serial.print("httpCode: ");
-    Serial.print(httpCode);
-    // httpCode will be negative on error
+    Serial.println(httpCode);
+    
     if (httpCode > 0) {
-      // HTTP header has been send and Server response header has been handled
-      // file found at server
-      // if (httpCode == HTTP_CODE_OK) {
       if (httpCode == HTTP_CODE_CREATED) {
         displaySuccess();
       } else {
@@ -100,7 +95,7 @@ void loop() {
   }
 }
 
-void array_to_string(byte array[], unsigned int len, char buffer[]) {
+void byte_to_string(byte array[], unsigned int len, char buffer[]) {
   for (unsigned int i = 0; i < len; i++)
   {
     byte nib1 = (array[i] >> 4) & 0x0F;