diff --git a/WifiControlSensor/EEPROM.ino b/WifiControlSensor/EEPROM.ino
index 4d03e9e..4653cb1 100644
--- a/WifiControlSensor/EEPROM.ino
+++ b/WifiControlSensor/EEPROM.ino
@@ -10,12 +10,12 @@ int EepromSaveConfig(uint8_t bootMode, String ssid, String password, String host
 
   eeprom = String(bootMode) + ";" + ssid + ";" + password + ";" + host + ";" + mqttServer +  ";" + mqttUser + ";" + mqttPasswd + ";" + String(mqttPort) + ";";
 
-  if (eeprom.length() > EEPROM_SIZE )
+  if (eeprom.length() > CONFIG_EEPROM_SIZE )
     return -EMSGSIZE;
 
   SKETCH_DEBUG_PRINTLN("Saving " + eeprom);
 
-  for (int i = 0; i < eeprom.length() && i < EEPROM_SIZE; i++) {
+  for (int i = 0; i < eeprom.length() && i < CONFIG_EEPROM_SIZE; i++) {
     EEPROM.write(i, eeprom.charAt(i));
   }
 
@@ -37,10 +37,10 @@ void readConfElement(char** element, int &i) {
   do {
     eeprom[i] = EEPROM.read(i);
     i++;
-  } while (i < EEPROM_SIZE && eeprom[i - 1] != ';');
+  } while (i < CONFIG_EEPROM_SIZE && eeprom[i - 1] != ';');
   eeprom[i - 1] = '\0';
 
-  if (i >= EEPROM_SIZE)
+  if (i >= CONFIG_EEPROM_SIZE)
     **element = '\0';
 
 }
diff --git a/WifiControlSensor/WifiControlSensor.ino b/WifiControlSensor/WifiControlSensor.ino
index 15d63ac..a44ead8 100644
--- a/WifiControlSensor/WifiControlSensor.ino
+++ b/WifiControlSensor/WifiControlSensor.ino
@@ -43,8 +43,8 @@
 #include "Adafruit_MQTT.h"
 #include "Adafruit_MQTT_Client.h"
 
-#define EEPROM_SIZE 256
-char eeprom[EEPROM_SIZE];
+#define CONFIG_EEPROM_SIZE 256
+char eeprom[CONFIG_EEPROM_SIZE];
 
 #define BOOTMODE_SETUP  0
 #define BOOTMODE_NORMAL 1
@@ -174,7 +174,7 @@ void setup() {
   Serial.swap(); // Switch back on GPIO 1 & 3
 #endif
 
-  EEPROM.begin(EEPROM_SIZE);
+  EEPROM.begin(CONFIG_EEPROM_SIZE);
   EepromReadConfig(mode, &confSsid, &confPassword, &confHost, &mqttServer, &mqttUser, &mqttPasswd, mqttPort);
 
   hostName = confHost;
diff --git a/WifiControlSensor/config.h b/WifiControlSensor/config.h
index f0fac82..e01c7e8 100644
--- a/WifiControlSensor/config.h
+++ b/WifiControlSensor/config.h
@@ -3,7 +3,7 @@
 
 /* DO NOT CHANGE THIS FILE                                           */
 /* Contains values that SHOULD be defined to have the sketch working */
-/* Modify value in config_device.h                                   */
+/* Modify value in config_device.h instead                           */
 
 #ifndef CONFIG_WEB_DELAY_MS
 #define CONFIG_WEB_DELAY_MS 100
@@ -27,3 +27,5 @@
 #define CONFIG_MQTT_CONTROLLED_GPIO {2, 13}
 
 #define CONFIG_WEB_CONTROLLED_GPIO 2
+
+#define CONFIG_EEPROM_SIZE 256
diff --git a/WifiControlSensor/config_device.h b/WifiControlSensor/config_device.h
index 5616050..d3bde77 100644
--- a/WifiControlSensor/config_device.h
+++ b/WifiControlSensor/config_device.h
@@ -26,3 +26,7 @@
 // GPIO that can be set or get by mqtt
 // Should have less value than MAXSUBSCRIPTIONS
 //#define CONFIG_MQTT_CONTROLLED_GPIO {2, 13}
+
+
+// EEPROM SIZE
+//#CONFIG_EEPROM_SIZE 256