diff --git a/GpsTracker/Config.cpp b/GpsTracker/Config.cpp
index 463a664..ff0db55 100644
--- a/GpsTracker/Config.cpp
+++ b/GpsTracker/Config.cpp
@@ -8,8 +8,10 @@ namespace config {
 	Config value;
 
 	void write() {
-		hardware::i2c::eeprom.writeBlock(CONFIG_ADDR, value);
 		VERBOSE_FORMAT("writeConfig", "%s, %s, %d, %d", value.seed, value.version, value.firstEntry, value.lastEntry);
+		hardware::i2c::eepromPowerOn();
+		int written = hardware::i2c::eeprom.writeBlock(CONFIG_ADDR, value);
+		hardware::i2c::eepromPowerOff();
 	}
 
 	void reset() {
@@ -23,12 +25,16 @@ namespace config {
 
 		value = config;
 		write();
+
+		VERBOSE_FORMAT("resetConfig", "value : %s, %s, %d, %d", value.seed, value.version, value.firstEntry, value.lastEntry);
 	}
 
 	void read() {
+		hardware::i2c::eepromPowerOn();
 		hardware::i2c::eeprom.readBlock(CONFIG_ADDR, value);
 		if (!String(CONFIG_SEED).equals(value.seed)) reset();
 
 		VERBOSE_FORMAT("readConfig", "%s, %s, %d, %d", value.seed, value.version, value.firstEntry, value.lastEntry);
+		hardware::i2c::eepromPowerOff();
 	}	
 }
\ No newline at end of file
diff --git a/GpsTracker/Config.h b/GpsTracker/Config.h
index 9e438fa..f93cd34 100644
--- a/GpsTracker/Config.h
+++ b/GpsTracker/Config.h
@@ -15,7 +15,7 @@ struct Config {
 };
 
 #define CONFIG_ADDR 0
-#define CONFIG_SEED "UIYB"
+#define CONFIG_SEED "UIYA"
 #define VERSION "1.00"
 
 #define SLEEP_DEFAULT_TIME_SECONDS	1800
diff --git a/GpsTracker/Debug.cpp b/GpsTracker/Debug.cpp
index c9c642b..3377cbc 100644
--- a/GpsTracker/Debug.cpp
+++ b/GpsTracker/Debug.cpp
@@ -96,6 +96,7 @@ namespace debug {
 
 	void waitForSerial() {
 		while (!Serial);
+		Serial.begin(DEBUG_SERIAL_SPEED);
 		Serial.println("Starting !");
 	}
 
@@ -142,6 +143,7 @@ namespace debug {
 
 	void setFakeGpsPosition() {
 		strncpy_P(gps::lastPosition, FAKE_GPS_ENTRY, GPS_POSITION_SIZE);
+		Log.notice(F("Last position set to : %s\n"), gps::lastPosition);
 	}
 
 	void getAndDisplayBattery() {
@@ -160,9 +162,7 @@ namespace debug {
 	}
 
 	void getAndDisplayEepromConfig() {
-		hardware::i2c::eepromPowerOn();
 		config::read();
-		hardware::i2c::eepromPowerOff(); 	
 	}
 
 	void getAndDisplayEepromPositions() {
diff --git a/GpsTracker/GpsTracker.ino b/GpsTracker/GpsTracker.ino
index b167dab..7f82d7d 100644
--- a/GpsTracker/GpsTracker.ino
+++ b/GpsTracker/GpsTracker.ino
@@ -18,6 +18,7 @@ void setup() {
 }
 
 void loop() {
+
 	debug::GPSTRACKER_DEBUG_COMMAND command = debug::GPSTRACKER_DEBUG_COMMAND::RUN;
 	if(!bypassMenu) command = debug::menu();
 
diff --git a/GpsTracker/Hardware.cpp b/GpsTracker/Hardware.cpp
index e249363..2e1b27b 100644
--- a/GpsTracker/Hardware.cpp
+++ b/GpsTracker/Hardware.cpp
@@ -1,5 +1,6 @@
 #include "Hardware.h"
 #include "Pins.h"
+#include "Debug.h"
 
 #include <SoftwareSerial.h>
 #include <SIM808.h>
@@ -8,8 +9,11 @@
 #include <Wire.h>
 #include <E24.h>
 
+
 namespace hardware {
 
+#define LOGGER_NAME "Hardware::sim808"
+
 	namespace sim808 {
 		SoftwareSerial simSerial = SoftwareSerial(SIM_TX, SIM_RX);
 		SIM808 device = SIM808(SIM_RST, SIM_PWR, SIM_STATUS);
@@ -66,6 +70,8 @@ namespace hardware {
 		}
 	}
 
+#define LOGGER_NAME "Hardware::i2c"
+
 	namespace i2c {
 
 		#define DEVICE_RTC 1
@@ -74,12 +80,12 @@ namespace hardware {
 		E24 eeprom = E24(E24Size_t::E24_512K);
 
 		uint8_t powered = 0;
+		uint8_t poweredCount = 0;
 
 		//inline void powered() { digitalRead(I2C_PWR) == HIGH; } //TODO = replace enum with just reading the output pin ?
 
 		void powerOn() {
-			if (powered > 0) return;
-
+			VERBOSE("powerOn");
 			digitalWrite(I2C_PWR, HIGH);
 			pinMode(I2C_PWR, OUTPUT);
 
@@ -87,6 +93,7 @@ namespace hardware {
 		}
 
 		void powerOff() {
+			VERBOSE("powerOff");
 			pinMode(I2C_PWR, INPUT);
 			digitalWrite(I2C_PWR, LOW);
 
@@ -98,12 +105,19 @@ namespace hardware {
 			digitalWrite(A5, LOW);
 		}
 
-		inline void powerOffIfUnused() {
-			if (!powered) powerOff();
+		void powerOnIfPoweredOff() {
+			if (!poweredCount) powerOn();
+			poweredCount++;
+		}
+
+		void powerOffIfUnused() {
+			if (!poweredCount) return;
+			poweredCount--;
+			if (!poweredCount) powerOff();
 		}
 
 		void rtcPowerOn() {
-			powerOn();
+			powerOnIfPoweredOff();
 			powered |= DEVICE_RTC;
 		}
 
@@ -113,7 +127,7 @@ namespace hardware {
 		}
 
 		void eepromPowerOn() {
-			powerOn();
+			powerOnIfPoweredOff();
 			powered |= DEVICE_EEPROM;
 		}