diff --git a/GpsTracker/Config.cpp b/GpsTracker/Config.cpp
index 0c9e3d3..4c5c21a 100644
--- a/GpsTracker/Config.cpp
+++ b/GpsTracker/Config.cpp
@@ -17,6 +17,11 @@ namespace config {
 				hardware::i2c::eeprom.readBlock(CONFIG_ADDR, value);
 				if (CONFIG_SEED != value.seed) reset(); //todo : reset network if seed for network is not right
 				hardware::i2c::powerOff();
+
+				VERBOSE_FORMAT("read", "%d, %s, %d, %d", value.seed, value.version, value.firstEntry, value.lastEntry);
+#if BACKUP_ENABLE_NETWORK
+				VERBOSE_FORMAT("read", "%d, %d, %s, %s", value.network.saveThreshold, value.network.lastSavedEntry, value.network.apn, value.network.url);
+#endif
 			}
 
 			void write() {
@@ -30,18 +35,11 @@ namespace config {
 			}
 		}
 
-		config_t get() {
-			if (value.seed == 0) details::read();
-
-			VERBOSE_FORMAT("get", "%d, %s, %d, %d", value.seed, value.version, value.firstEntry, value.lastEntry);
-#if BACKUP_ENABLE_NETWORK
-			VERBOSE_FORMAT("get", "%d, %d, %s, %s", value.network.saveThreshold, value.network.lastSavedEntry, value.network.apn, value.network.url);
-#endif
-			return value;
+		void setup() {
+			details::read();
 		}
 
-		void set(const config_t config) {
-			value = config;
+		void save() {
 			details::write();
 		}
 
@@ -63,7 +61,7 @@ namespace config {
 			};
 
 			value = config;
-			details::write();
+			save();
 		}
 
 	}
diff --git a/GpsTracker/Config.h b/GpsTracker/Config.h
index 4ca382c..259ad82 100644
--- a/GpsTracker/Config.h
+++ b/GpsTracker/Config.h
@@ -52,9 +52,11 @@ namespace config {
 	{ 180, 180 },
 	};
 
-	namespace main {	
-		config_t get();
-		void set(const config_t config);
+	namespace main {
+		extern config_t value;
+
+		void setup();
+		void save();
 
 		void reset();
 	}
diff --git a/GpsTracker/Debug.cpp b/GpsTracker/Debug.cpp
index 6d69f53..129cbd0 100644
--- a/GpsTracker/Debug.cpp
+++ b/GpsTracker/Debug.cpp
@@ -124,6 +124,10 @@ namespace debug {
 		return freeRam2();
 	}
 
+	void displayFreeRam() {
+		Log.notice(F("RAM: %d\n"), freeRam());
+	}
+
 	GPSTRACKER_DEBUG_COMMAND parseCommand(char id) {
 		size_t mappingArraySize = flash::getArraySize(commandIdMapping);
 		char commandId;
@@ -183,7 +187,7 @@ namespace debug {
 	}
 
 	void getAndDisplayEepromConfig() {
-		config::main::get();
+		config::main::setup(); //forcing read again
 	}
 
 	void getAndDisplayEepromContent() {
@@ -203,7 +207,7 @@ namespace debug {
 	}
 
 	void getAndDisplayEepromPositions() {
-		uint16_t currentEntryIndex = config::main::get().firstEntry;
+		uint16_t currentEntryIndex = config::main::value.firstEntry;
 		PositionEntry currentEntry;
 
 		hardware::i2c::powerOn();
@@ -215,7 +219,7 @@ namespace debug {
 	}
 
 	void getAndDisplayEepromLastPosition() {
-		uint16_t lastEntryIndex = config::main::get().lastEntry;
+		uint16_t lastEntryIndex = config::main::value.lastEntry;
 		PositionEntry lastEntry;
 
 		positions::get(lastEntryIndex, lastEntry);
diff --git a/GpsTracker/Debug.h b/GpsTracker/Debug.h
index e6dc10c..dd06cb2 100644
--- a/GpsTracker/Debug.h
+++ b/GpsTracker/Debug.h
@@ -61,6 +61,7 @@ namespace debug {
 
 	void waitForSerial();
 	int freeRam();
+	void displayFreeRam();
 
 	GPSTRACKER_DEBUG_COMMAND menu();
 
@@ -77,6 +78,5 @@ namespace debug {
 	void getAndDisplayEepromLastPosition();
 	void addLastPositionToEeprom();
 
-	inline void displayFreeRam() { Serial.println(freeRam()); }
 
 }
diff --git a/GpsTracker/GpsTracker.ino b/GpsTracker/GpsTracker.ino
index b5c711d..d823820 100644
--- a/GpsTracker/GpsTracker.ino
+++ b/GpsTracker/GpsTracker.ino
@@ -11,6 +11,8 @@ void setup() {
 	if(Serial) Log.begin(LOG_LEVEL_NOTICE, &Serial);
 #endif
 
+	if (Serial) Serial.println(F("============================="));
+	config::main::setup();
 	rtc::setup();
 	hardware::sim808::setup();
 	positions::setup();
diff --git a/GpsTracker/Network.cpp b/GpsTracker/Network.cpp
index d01acda..0a74b91 100644
--- a/GpsTracker/Network.cpp
+++ b/GpsTracker/Network.cpp
@@ -30,7 +30,7 @@ namespace network {
 	}
 
 	bool enableGprs() {
-		return hardware::sim808::device.enableGprs(config::main::get().network.apn);
+		return hardware::sim808::device.enableGprs(config::main::value.network.apn);
 	}
 	
 	
diff --git a/GpsTracker/NetworkPositionsBackup.cpp b/GpsTracker/NetworkPositionsBackup.cpp
index 3a0e0ab..11b7819 100644
--- a/GpsTracker/NetworkPositionsBackup.cpp
+++ b/GpsTracker/NetworkPositionsBackup.cpp
@@ -8,7 +8,7 @@
 #include "Network.h"
 
 #define LOGGER_NAME "Positions::backup::network"
-#define BUFFER_SIZE 160
+#define BUFFER_SIZE 170
 
 namespace positions {
 	namespace backup {
@@ -16,25 +16,30 @@ namespace positions {
 
 			namespace details {
 
-				bool isBackupNeeded(config_t &config) {
-					config = config::main::get();
-
-					return config.network.lastSavedEntry == 0xFFFF ||
-						positions::count(config.network.lastSavedEntry) > config.network.saveThreshold;
+				bool isBackupNeeded() {
+					config_t *config = &config::main::value;
+					return config->network.lastSavedEntry == 0xFFFF ||
+						positions::count(config->network.lastSavedEntry) > config->network.saveThreshold;
 				}
 
-				bool appendPosition(config_t &config, PositionEntry &entry) {
+				bool appendPosition(PositionEntry &entry) {
+					VERBOSE("appendPosition");
 					debug::displayFreeRam();
-					return false;
-					/*char buffer[BUFFER_SIZE];
-					snprintf_P(buffer, BUFFER_SIZE, PSTR("%d,%d,%.2f,%d,%s,%d"),
+					delay(100);
+					char buffer[BUFFER_SIZE];
+					sprintf(buffer, "%d", 2100);
+					/*snprintf(buffer, BUFFER_SIZE, "%d,%d,%.2f,%d,",
 						entry.metadata.batteryLevel,
 						entry.metadata.batteryVoltage,
 						entry.metadata.temperature,
-						static_cast<uint8_t>(entry.metadata.status),
-						entry.position);
+						static_cast<uint8_t>(entry.metadata.status));*/
+
+					////strcat(buffer, entry.position);
+					//Serial.println(buffer);
+					debug::displayFreeRam();
+					return false;
 
-					return hardware::sim808::device.httpPost(
+					/*return hardware::sim808::device.httpPost(
 						config.network.url,
 						PSTR("text/csv"),
 						buffer,
@@ -43,32 +48,37 @@ namespace positions {
 					) == POSITIONS_CONFIG_NET_DEFAULT_EXPECTED_RESPONSE;*/
 				}
 
-				void appendPositions(config_t &config) {
+				void appendPositions() {
 					VERBOSE("appendPositions");
+					debug::displayFreeRam();
 
-					uint16_t currentEntryIndex = config.network.lastSavedEntry + 1;
+					uint16_t currentEntryIndex = config::main::value.network.lastSavedEntry + 1;
 					PositionEntry currentEntry;
 					SIM808RegistrationStatus networkStatus;
 
-					network::powerOn();
+					/*network::powerOn();
 					networkStatus = network::waitForRegistered(NETWORK_DEFAULT_TOTAL_TIMEOUT_MS);
 
 					if (!network::isAvailable(networkStatus.stat)) VERBOSE_MSG("appendPositions", "network unavailable");
 					else if (!network::enableGprs()) VERBOSE_MSG("appendPositions", "gprs unavailable");
-					else {
+					else {*/
 						hardware::i2c::powerOn();
 						do {
 							if (!positions::get(currentEntryIndex, currentEntry)) break;
-							if (!appendPosition(config, currentEntry)) break;
+							debug::displayFreeRam();
 
-							config.network.lastSavedEntry = currentEntryIndex;
-							config::main::set(config);
+							//if (!appendPosition(currentEntry)) break;
 
+							/*config::main::value.network.lastSavedEntry = currentEntryIndex;
+							config::main::save();
+*/
 						} while (positions::moveNext(currentEntryIndex));
+						debug::displayFreeRam();
 						hardware::i2c::powerOff();
-					}
+					//}
 
-					network::powerOff();
+					//network::powerOff();
+					debug::displayFreeRam();
 				}
 
 			}
@@ -79,10 +89,12 @@ namespace positions {
 
 			void NetworkPositionsBackup::backup() {
 				VERBOSE("backup");
+				debug::displayFreeRam();
+
+				if (!details::isBackupNeeded()) return;
+				debug::displayFreeRam();
 
-				config_t config;
-				if (!details::isBackupNeeded(config)) return;
-				details::appendPositions(config);
+				details::appendPositions();
 			}
 		}
 	}
diff --git a/GpsTracker/Positions.cpp b/GpsTracker/Positions.cpp
index 0c4c109..224cb12 100644
--- a/GpsTracker/Positions.cpp
+++ b/GpsTracker/Positions.cpp
@@ -85,24 +85,27 @@ namespace positions {
 	void appendLast(const PositionEntryMetadata &metadata) {
 		VERBOSE("appendLast");
 
+		uint16_t entryIndex;
 		uint16_t entryAddress;
 		PositionEntry entry = { metadata };
 		strlcpy(entry.position, gps::lastPosition, POSITION_SIZE);
 
-		hardware::i2c::powerOn();
-		config_t config = config::main::get();
+		config_t* config = &config::main::value;
+		entryIndex = config->lastEntry + 1;
 
-		config.lastEntry++;
-		if (config.lastEntry > details::maxEntryIndex) config.lastEntry = 0;
-		if (config.lastEntry == config.firstEntry) config.firstEntry++;
-		if (config.firstEntry > details::maxEntryIndex) config.firstEntry = 0;
+		entryAddress = details::getEntryAddress(entryIndex);
 
-		entryAddress = details::getEntryAddress(config.lastEntry);
+		hardware::i2c::powerOn();
 		hardware::i2c::eeprom.writeBlock(entryAddress, entry);
 
 		VERBOSE_FORMAT("appendLast", "Written to EEPROM @ %X : [%d%% @ %dmV] [%f°C] [TTF : %d, Status : %d, Position : %s]", entryAddress, entry.metadata.batteryLevel, entry.metadata.batteryVoltage, entry.metadata.temperature, entry.metadata.timeToFix, entry.metadata.status, entry.position);
 
-		config::main::set(config);
+		config->lastEntry++;
+		if (config->lastEntry > details::maxEntryIndex) config->lastEntry = 0;
+		if (config->lastEntry == config->firstEntry) config->firstEntry++;
+		if (config->firstEntry > details::maxEntryIndex) config->firstEntry = 0;
+
+		config::main::save();
 		hardware::i2c::powerOff();
 	}
 
@@ -121,7 +124,7 @@ namespace positions {
 	}
 
 	bool moveNext(uint16_t &index) {
-		if (index == config::main::get().lastEntry) return false;
+		if (index == config::main::value.lastEntry) return false;
 		
 		if (index == details::maxEntryIndex) index = 0; //could use a modulo but easier to understand that way
 		else index++;
@@ -130,18 +133,18 @@ namespace positions {
 	}
 
 	uint16_t count(uint16_t fromIndex) {
-		config_t config = config::main::get();
-		if (config.lastEntry < config.firstEntry) { config.lastEntry += details::maxEntryIndex; }
+		config_t *config = &config::main::value;
+		if (config->lastEntry < config->firstEntry) { config->lastEntry += details::maxEntryIndex; }
 
-		return config.lastEntry - fromIndex;
+		return config->lastEntry - fromIndex;
 	}
 
 	void doBackup() {
 #ifdef BACKUPS_ENABLED
+		debug::displayFreeRam();
 		VERBOSE_FORMAT("doBackup", "%d backups enabled", BACKUPS_ENABLED);
-		Serial.println((unsigned int)_backups[0], HEX);
 		_backups[0]->backup();
-
+		debug::displayFreeRam();
 		/*for (int i = 0; i < BACKUPS_ENABLED; i++) {
 			VERBOSE_FORMAT("doBackup", "calling backup %d", i);
 			delay(1000);
diff --git a/GpsTracker/SdPositionsBackup.cpp b/GpsTracker/SdPositionsBackup.cpp
index 426e583..4bfcb50 100644
--- a/GpsTracker/SdPositionsBackup.cpp
+++ b/GpsTracker/SdPositionsBackup.cpp
@@ -16,7 +16,7 @@ namespace positions {
 			namespace details {
 
 				bool isBackupNeeded(SdPositionConfig_t &sdConfig) {
-					Config_t referenceConfig = config::main::get();
+					Config_t referenceConfig = config::main::value;
 					sdConfig = config::backup::sd::get();
 
 					return sdConfig.lastSavedEntry == 0xFFFF ||