diff --git a/src/lora/lorawan.c b/src/lora/lorawan.c
index 0207027..405da79 100644
--- a/src/lora/lorawan.c
+++ b/src/lora/lorawan.c
@@ -24,7 +24,7 @@ static uint8_t app_key[] = LORAWAN_APP_KEY;
 static uint8_t join_eui[] = LORAWAN_APP_EUI;
 
 /* ABP keys and address */
-static uint32_t dev_addr = LORAWAN_DEV_ADDR;
+static uint8_t dev_addr[] = LORAWAN_DEV_ADDR;
 static uint8_t nwks_key[] = LORAWAN_NWKS_KEY;
 static uint8_t apps_key[] = LORAWAN_APPS_KEY;
 
@@ -308,14 +308,14 @@ void join_network_otaa()
 void join_network_abp()
 {
 	LOG_INF("Starting ABP activation...");
-	LOG_INF("DevAddr: 0x%08X", dev_addr);
+	LOG_INF("DevAddr: 0x%02X%02X%02X%02X", dev_addr[0], dev_addr[1], dev_addr[2], dev_addr[3]);
 	LOG_HEXDUMP_INF(nwks_key, 16, "NwkSKey: ");
 	LOG_HEXDUMP_INF(apps_key, 16, "AppSKey: ");
 
 	/* Configure ABP parameters */
 	join_cfg.mode = LORAWAN_ACT_ABP;
 	join_cfg.dev_eui = dev_eui;
-	join_cfg.abp.dev_addr = dev_addr;
+	join_cfg.abp.dev_addr = (dev_addr[0] << 24) | (dev_addr[1] << 16) | (dev_addr[2] << 8) | dev_addr[3];
 	join_cfg.abp.nwk_skey = nwks_key;
 	join_cfg.abp.app_skey = apps_key;
 
@@ -327,7 +327,7 @@ void join_network_abp()
 	}
 
 	LOG_INF("✓ Successfully activated LoRaWAN network via ABP");
-	printk("Device 0x%08X activated via ABP\n", dev_addr);
+	printk("Device 0x%02X%02X%02X%02X activated via ABP\n", dev_addr[0], dev_addr[1], dev_addr[2], dev_addr[3]);
 }
 
 void send_data_packet(char *data, uint8_t data_len)
@@ -354,7 +354,7 @@ void send_data_packet(char *data, uint8_t data_len)
 		else
 		{
 			LOG_INF("✓ Data packet sent successfully!");
-			LOG_INF("DevAddr: 0x%08X, Port: %d, Length: %d bytes", dev_addr, LORAWAN_PORT, data_len);
+			LOG_INF("DevAddr: 0x%02X%02X%02X%02X, Port: %d, Length: %d bytes", dev_addr[0], dev_addr[1], dev_addr[2], dev_addr[3], LORAWAN_PORT, data_len);
 			break;
 		}
 
diff --git a/src/lora/lorawan.h b/src/lora/lorawan.h
index d75d1cc..e372a18 100644
--- a/src/lora/lorawan.h
+++ b/src/lora/lorawan.h
@@ -4,13 +4,13 @@
 #define LORAWAN_PORT 2
 
 /* ABP Configuration */
-#define LORAWAN_DEV_ADDR {0x01, 0x94, 0xC6, 0x5F}
-#define LORAWAN_NWKS_KEY {0x26, 0x8F, 0xDA, 0x93, 0x3F, 0x4C, \
-						  0xAE, 0xBF, 0x96, 0xA3, 0x0F, 0xE7, \
-						  0x60, 0x27, 0xA4, 0x1E}
-#define LORAWAN_APPS_KEY {0x40, 0x80, 0x09, 0xCA, 0x1D, 0x9F, \
-						  0xE2, 0xB8, 0x22, 0xF4, 0x68, 0x4D, \
-						  0x76, 0x33, 0x13, 0x00}
+#define LORAWAN_DEV_ADDR {0x01, 0x9D, 0x28, 0xDF}
+#define LORAWAN_NWKS_KEY {0x4C, 0xF3, 0xD2, 0xF5, 0x6C, 0x5C, \
+						  0x45, 0xA6, 0x78, 0x81, 0xD7, 0xBA, \
+						  0x91, 0x61, 0x65, 0x11}
+#define LORAWAN_APPS_KEY {0x41, 0x5F, 0x07, 0xCF, 0x5B, 0xA6, \
+						  0xE6, 0x30, 0xC4, 0xC3, 0xEB, 0x9C, \
+						  0x7E, 0x71, 0x8C, 0x5D}
 
 /* OTAA Configuration (backup) */
 #define LORAWAN_APP_KEY {0x71, 0x5A, 0x39, 0xB2, 0x86, 0xC3, \
diff --git a/src/main.c b/src/main.c
index d8c6e7d..2f8d676 100644
--- a/src/main.c
+++ b/src/main.c
@@ -42,8 +42,20 @@ int main(void)
 		temp = get_stable_value_sht4x(SENSOR_CHAN_AMBIENT_TEMP);
 		printk("hum: %d.%02d%%\n", (int)humidity, (int)(humidity * 100) % 100);
 		printk("temp: %d.%02d °C\n", (int)temp, (int)(temp * 100) % 100);
+		/* Try MLX sensor with stable measurement (10 samples) */
 		floor_temp = get_stable_value_mlx90614(MLX90614_IR_TEMP_ADDR);
-		printk("floor_temp: %d.%02d °C\n", (int)floor_temp, (int)(floor_temp * 100) % 100);
+		if (mlx90614_sensor_available)
+		{
+			LOG_INF("MLX stable measurement: %d.%02d °C", (int)floor_temp, (int)(floor_temp * 100) % 100);
+		}
+		else
+		{
+			LOG_WRN("MLX sensor not available");
+		}
+
+		printk("floor_temp: %d.%02d °C (available: %s)\n",
+			   (int)floor_temp, (int)(floor_temp * 100) % 100,
+			   mlx90614_sensor_available ? "YES" : "NO");
 
 		/* Set relais based on temperature if not manually overridden */
 		if (!relais_manual_override)
diff --git a/src/sensors/mlx90614.c b/src/sensors/mlx90614.c
index b613a91..9301cb1 100644
--- a/src/sensors/mlx90614.c
+++ b/src/sensors/mlx90614.c
@@ -76,9 +76,10 @@ static float read_mlx_object_temp(void)
 
 float get_stable_value_mlx90614(uint8_t target_addr)
 {
-	// Früher Ausstieg wenn Sensor nicht verfügbar
+	// Test ob Sensor verfügbar ist
+	request_sensor_data_mlx90614(target_addr);
 	if (!mlx90614_sensor_available) {
-		LOG_DBG("MLX90614 not available, returning 0.0");
+		LOG_INF("MLX90614 not available, returning 0.0");
 		return 0.0;
 	}
 
diff --git a/src/sensors/sensor_utils.c b/src/sensors/sensor_utils.c
index c66ae42..89bbba4 100644
--- a/src/sensors/sensor_utils.c
+++ b/src/sensors/sensor_utils.c
@@ -7,12 +7,12 @@ LOG_MODULE_REGISTER(sensor_utils);
 
 float get_stable_sensor_value(sensor_read_func_t read_func, float outlier_threshold)
 {
-	const int MAX_SAMPLES = 5;
+	const int MAX_SAMPLES = 10;
 	float measurements[MAX_SAMPLES];
 	int valid_count = 0;
 
-	// Sammle bis zu 5 Messungen
-	for (int i = 0; i < MAX_SAMPLES && valid_count < 3; i++) {
+	// Sammle bis zu 10 Messungen
+	for (int i = 0; i < MAX_SAMPLES && valid_count < 7; i++) {
 		if (i > 0) {
 			k_sleep(K_MSEC(500)); // Pause gegen Selbsterhitzung
 		}
@@ -66,8 +66,8 @@ float get_stable_sensor_value(sensor_read_func_t read_func, float outlier_thresh
 
 	if (filtered_count > 0) {
 		float result = sum / filtered_count;
-		LOG_INF("Stable sensor value: %.2f (filtered %d/%d samples)",
-			result, filtered_count, valid_count);
+		LOG_INF("Stable sensor value: %d.%02d (filtered %d/%d samples)",
+			(int)result, (int)(result * 100) % 100, filtered_count, valid_count);
 		return result;
 	}
 
diff --git a/src/sensors/sht4x.c b/src/sensors/sht4x.c
index 7b45f3e..9c11441 100644
--- a/src/sensors/sht4x.c
+++ b/src/sensors/sht4x.c
@@ -50,7 +50,7 @@ float get_value_from_current_sample_sht4x(enum sensor_channel sensor)
 	if (sensor_channel_get(sht, sensor, &value) == 0) {
 		result = sensor_value_to_double(&value);
 		const char* sensor_name = (sensor == SENSOR_CHAN_AMBIENT_TEMP) ? "temperature" : "humidity";
-		LOG_DBG("SHT4X %s value: %.2f", sensor_name, result);
+		LOG_DBG("SHT4X %s value: %d.%02d", sensor_name, (int)result, (int)(result * 100) % 100);
 	} else {
 		const char* sensor_name = (sensor == SENSOR_CHAN_AMBIENT_TEMP) ? "temperature" : "humidity";
 		LOG_ERR("Can't read SHT4X %s from sample!", sensor_name);
diff --git a/zephyr/prj.conf b/zephyr/prj.conf
index c3b75a9..84bef49 100644
--- a/zephyr/prj.conf
+++ b/zephyr/prj.conf
@@ -10,6 +10,9 @@ CONFIG_SHT4X=y
 CONFIG_LORA=y
 CONFIG_LORAWAN=y
 CONFIG_LORAMAC_REGION_EU868=y
+
+# LoRaWAN Frame Counter persistence
+CONFIG_LORAWAN_NVM_SETTINGS=y
 CONFIG_MAIN_STACK_SIZE=4096
 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
 CONFIG_LOG_DEFAULT_LEVEL=3