diff --git a/the-cup.ino b/the-cup.ino
index 7df37dd..d009988 100644
--- a/the-cup.ino
+++ b/the-cup.ino
@@ -26,11 +26,11 @@
 #define RGB_BRIGHTNESS 4 // Change neopixel brightness (max 255)
 
 MFRC522DriverPinSimple ss_1_pin(SS_PIN); // Configurable, take an unused pin, only HIGH/LOW required, must be different to SS 2.
-
 MFRC522DriverSPI driver_1{ss_1_pin};
-
 MFRC522 reader{driver_1};   // Create MFRC522 instance.
 
+RTC_DATA_ATTR int nbCycles = 0;
+
 const char *rootCACertificate = R"string_literal(
 -----BEGIN CERTIFICATE-----
 MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw
@@ -71,6 +71,8 @@ void send_uid(char reader_uid[]);
 void setup() {
   Serial.begin(115200);
   while (!Serial) delay(10);
+  Serial.print("Nb cycles: ");
+  Serial.println(nbCycles++);
 
   pinMode(RC522_POWER_PIN, OUTPUT);
   digitalWrite(RC522_POWER_PIN, HIGH);