diff --git a/daemon/alix-usvd.c b/daemon/alix-usvd.c
index 02022ba..ed3af1f 100644
--- a/daemon/alix-usvd.c
+++ b/daemon/alix-usvd.c
@@ -36,6 +36,9 @@
 #include "logging.h"
 #include "unixsocket.h"
 
+/* eeprom parameters / thresholds & defaults */
+#include "../eeprom.h"
+
 #define DEFAULT_CONFIG "alix-usvd.conf"
 #define DEFAULT_LOGFILE "alix-usvd.log"
 #define DEFAULT_SOCKET "alix-usvd.sock"
@@ -64,6 +67,12 @@ enum {
 	STATE_POWEROFF	= 0x10,
 };
 
+enum {
+	I2CDEV_ERR = -1,
+	I2CDEV_UNKNOWN = 0,
+	I2CDEV_OK = 1,
+};
+
 static struct option opts[] = {
 	{"nofork",	0, 0, 'd'},
 	{"config",	1, 0, 'c'},
@@ -96,11 +105,11 @@ static int i2cdev_open(const char *i2c_device, int i2c_address)
 	return fd;
 }
 
-static int i2cdev_open_wrap(void)
+static int alix_open(void)
 {
 	static const char *i2c_device;
 	static int i2c_address;
-	static int i2c_last_opened;
+	static int i2c_status = I2CDEV_UNKNOWN;
 
 	if (i2c_device == NULL) {
 		i2c_device = config_get_string("global", "i2c-device", "/dev/i2c-0");
@@ -109,20 +118,84 @@ static int i2cdev_open_wrap(void)
 
 	int dev = i2cdev_open(i2c_device, i2c_address);
 	if (dev < 0) {
-		if (i2c_last_opened != -1)
+		if (i2c_status != I2CDEV_ERR)
 			log_print(LOG_WARN, "failed to open %s:0x%02x", i2c_device, i2c_address);
 
-		i2c_last_opened = -1;
+		i2c_status = I2CDEV_ERR;
 		return -1;
 	}
 
-	if (i2c_last_opened < 1)
+	if (i2c_status != I2CDEV_OK)
 		log_print(LOG_INFO, "successfully opened %s:0x%02x", i2c_device, i2c_address);
 
-	i2c_last_opened = 1;
+	i2c_status = I2CDEV_OK;
 	return dev;
 }
 
+static int check_thresholds(void)
+{
+	int dev = alix_open();
+	if (dev < 0)
+		return -1;
+
+	struct ee_param defaults = DEFAULT_PARAMETERS;
+
+	struct ee_param config;
+	config.uin_loss = config_get_int("thresholds", "uin_loss" , defaults.uin_loss);
+	config.uin_restore = config_get_int("thresholds", "uin_restore" , defaults.uin_restore);
+	config.ubat_full = config_get_int("thresholds", "ubat_full" , defaults.ubat_full);
+	config.ubat_low = config_get_int("thresholds", "ubat_low" , defaults.ubat_low);
+	config.ubat_critical = config_get_int("thresholds", "ubat_critical" , defaults.ubat_critical);
+	config.ibat_full = config_get_int("thresholds", "ibat_full" , defaults.ibat_full);
+
+	struct ee_param device;
+	device.uin_loss = i2c_smbus_read_word_data(dev, REG_UIN_LOSS);
+	device.uin_restore = i2c_smbus_read_word_data(dev, REG_UIN_RESTORE);
+	device.ubat_full = i2c_smbus_read_word_data(dev, REG_UBAT_FULL);
+	device.ubat_low = i2c_smbus_read_word_data(dev, REG_UBAT_LOW);
+	device.ubat_critical = i2c_smbus_read_word_data(dev, REG_UBAT_CRIT);
+	device.ibat_full = i2c_smbus_read_word_data(dev, REG_IBAT_FULL);
+	device.crc16 = 0x0000;
+
+	int changed = 0;
+
+	if (device.uin_loss != config.uin_loss) {
+		i2c_smbus_write_word_data(dev, REG_UIN_LOSS, config.uin_loss);
+		changed = 1;
+	}
+
+	if (device.uin_restore != config.uin_restore) {
+		i2c_smbus_write_word_data(dev, REG_UIN_RESTORE, config.uin_restore);
+		changed = 1;
+	}
+
+	if (device.ubat_full != config.ubat_full) {
+		i2c_smbus_write_word_data(dev, REG_UBAT_FULL, config.ubat_full);
+		changed = 1;
+	}
+
+	if (device.ubat_low != config.ubat_low) {
+		i2c_smbus_write_word_data(dev, REG_UBAT_LOW, config.ubat_low);
+		changed = 1;
+	}
+
+	if (device.ubat_critical != config.ubat_critical) {
+		i2c_smbus_write_word_data(dev, REG_UBAT_CRIT, config.ubat_critical);
+		changed = 1;
+	}
+
+	if (device.ibat_full != config.ibat_full) {
+		i2c_smbus_write_word_data(dev, REG_IBAT_FULL, config.ibat_full);
+		changed = 1;
+	}
+
+	if (changed == 1)
+		i2c_smbus_write_word_data(dev, REG_CRC, 0x0000);
+
+	close(dev);
+	return changed;
+}
+
 static char * state2str(int state)
 {
 	switch (state) {
@@ -167,9 +240,9 @@ static int str2state(char *buf)
 	return state;
 }
 
-static int usv_state = -1;
+static int alix_state = -1;
 
-static void check_state(int old_state, int new_state)
+static void alix_state_change(int old_state, int new_state)
 {
 	log_print(LOG_INFO, "usv state changed: %s => %s", state2str(old_state), state2str(new_state));
 	/* TODO: send email */
@@ -182,18 +255,18 @@ static int unix_read_cb(int fd, void *privdata)
 	if (len < 0)
 		return -1;
 
-	int dev = i2cdev_open_wrap();
+	int dev = alix_open();
 	if (dev < 0)
 		return 0;
 
 	int new_state = str2state(buf);
 	if (new_state != -1) {
 		if (i2c_smbus_write_word_data(dev, REG_STATUS, new_state) == 0) {
-			usv_state = new_state;
-			log_print(LOG_INFO, "set state to %s", state2str(usv_state));
+			alix_state = new_state;
+			log_print(LOG_INFO, "set state to %s", state2str(alix_state));
 		}
 
-		int len = snprintf(buf, sizeof(buf), "%s", state2str(usv_state));
+		int len = snprintf(buf, sizeof(buf), "%s", state2str(alix_state));
 		write(fd, buf, len);
 
 	} else if (strncmp(buf, "status", 6) == 0) {
@@ -208,9 +281,9 @@ static int unix_read_cb(int fd, void *privdata)
 			adc_ubat = 0;
 			adc_uin = 0;
 
-		} else if (new_state != usv_state) {
-			check_state(usv_state, new_state);
-			usv_state = new_state;
+		} else if (new_state != alix_state) {
+			alix_state_change(alix_state, new_state);
+			alix_state = new_state;
 		}
 
 		int len = snprintf(buf, sizeof(buf), "%s:%d:%d:%d",
@@ -237,7 +310,7 @@ static int unix_accept_cb(int fd, void *privdata)
 
 static int status_interval(void *privdata)
 {
-	int dev = i2cdev_open_wrap();
+	int dev = alix_open();
 	if (dev < 0)
 		return 0;
 
@@ -247,9 +320,9 @@ static int status_interval(void *privdata)
 		return 0;
 	}
 
-	if (new_state != usv_state) {
-		check_state(usv_state, new_state);
-		usv_state = new_state;
+	if (new_state != alix_state) {
+		alix_state_change(alix_state, new_state);
+		alix_state = new_state;
 	}
 
 	close(dev);
@@ -268,6 +341,7 @@ int main(int argc, char *argv[])
 		case 'd': /* debug */
 			debug = 1;
 			break;
+
 		case 'c': /* configfile path */
 			config = optarg;
 			break;
@@ -296,6 +370,8 @@ int main(int argc, char *argv[])
 		exit(1);
 
 	if (debug == 0) {
+		/* TODO: check PID-file */
+
 		/* start logging */
 		const char *logfile = config_get_string("global", "logfile", DEFAULT_LOGFILE);
 		if (log_init(logfile) < 0)
@@ -321,11 +397,12 @@ int main(int argc, char *argv[])
 	struct timeval tv = { .tv_sec = interval, .tv_usec = 0 };
 	event_add_timeout(&tv, status_interval, NULL);
 
-	int dev = i2cdev_open_wrap();
-	if (dev != -1) {
-		/* TODO: check thresholds */
-		close(dev);
-	}
+	int tmp = check_thresholds();
+	if (tmp < 0)
+		log_print(LOG_WARN, "unable to check thresholds");
+
+	else if (tmp == 1)
+		log_print(LOG_INFO, "updated thresholds");
 
 	event_loop();
 	return 0;
diff --git a/daemon/alix-usvd.conf b/daemon/alix-usvd.conf
index 964ef0d..31ecb60 100644
--- a/daemon/alix-usvd.conf
+++ b/daemon/alix-usvd.conf
@@ -17,5 +17,5 @@ uin_loss 12000
 uin_restore 14000
 ubat_full 13300
 ubat_low 12000
-ubat_crit 11000
+ubat_critical 11000
 ibat_full 150