diff --git a/stempayload/Payload_BME280_MPU6050_XS/Payload_BME280_MPU6050_XS.ino b/stempayload/Payload_BME280_MPU6050_XS/Payload_BME280_MPU6050_XS.ino
index 15787ffe..5034d3c5 100644
--- a/stempayload/Payload_BME280_MPU6050_XS/Payload_BME280_MPU6050_XS.ino
+++ b/stempayload/Payload_BME280_MPU6050_XS/Payload_BME280_MPU6050_XS.ino
@@ -388,7 +388,8 @@ void loop() {
     eeprom_word_write(calibration * 2 + 4 , (int)(temp * 10.0) + 0.5);
     eeprom_word_write(calibration * 2 + 5, sensorValue);
 
-    calibration = (calibration++) % 2;	  
+    calibration = (calibration + 1) % 2;
+    Serial.println(calibration + 1);	  
 	  
     if (EEPROM.commit()) {
       Serial.println("EEPROM successfully committed");