diff --git a/etc/dbus-serialbattery/bms/daly.py b/etc/dbus-serialbattery/bms/daly.py
index afd5c064..0c033254 100644
--- a/etc/dbus-serialbattery/bms/daly.py
+++ b/etc/dbus-serialbattery/bms/daly.py
@@ -404,7 +404,7 @@ def read_cells_volts(self, ser):
             for idx in range(self.cell_count):
                 self.cells.append(Cell(True))
 
-        # logger.warning("data " + bytes(cells_volts_data).hex())
+        # logger.warning("data " + bytearray_to_string(cells_volts_data))
 
         # from each of the received sentences, read up to 3 voltages
         for i in range(sentences_expected):
@@ -526,7 +526,7 @@ def read_battery_code(self, ser):
             return False
 
         battery_code = ""
-        # logger.warning("data " + bytes(cells_volts_data).hex())
+        # logger.warning("data " + utils.bytearray_to_string(cells_volts_data))
         for i in range(5):
             nr, part = unpack_from(">B7s", data, i * 8)
             if nr != i + 1:
@@ -720,7 +720,7 @@ def read_sentence(self, ser, expected_reply, timeout=0.5):
         reply = ser.read_until(b"\xA5")
         if not reply or b"\xA5" not in reply:
             logger.debug(
-                f"read_sentence {bytes(expected_reply).hex()}: no sentence start received"
+                f"read_sentence {utils.bytearray_to_string(expected_reply)}: no sentence start received"
             )
             return False
 
@@ -732,21 +732,27 @@ def read_sentence(self, ser, expected_reply, timeout=0.5):
             toread = ser.inWaiting()
             time_run = time() - time_start
             if time_run > timeout:
-                logger.debug(f"read_sentence {bytes(expected_reply).hex()}: timeout")
+                logger.debug(
+                    f"read_sentence {utils.bytearray_to_string(expected_reply)}: timeout"
+                )
                 return False
 
         reply += ser.read(12)
         _, id, cmd, length = unpack_from(">BBBB", reply)
 
-        # logger.info(f"reply: {bytes(reply).hex()}")  # debug
+        # logger.info(f"reply: {utils.bytearray_to_string(reply)}")  # debug
 
         if id != 1 or length != 8 or cmd != expected_reply[0]:
-            logger.debug(f"read_sentence {bytes(expected_reply).hex()}: wrong header")
+            logger.debug(
+                f"read_sentence {utils.bytearray_to_string(expected_reply)}: wrong header"
+            )
             return False
 
         chk = unpack_from(">B", reply, 12)[0]
         if sum(reply[:12]) & 0xFF != chk:
-            logger.debug(f"read_sentence {bytes(expected_reply).hex()}: wrong checksum")
+            logger.debug(
+                f"read_sentence {utils.bytearray_to_string(expected_reply)}: wrong checksum"
+            )
             return False
 
         return reply[4:12]
diff --git a/etc/dbus-serialbattery/bms/jkbms.py b/etc/dbus-serialbattery/bms/jkbms.py
index 99569e36..0a391d39 100644
--- a/etc/dbus-serialbattery/bms/jkbms.py
+++ b/etc/dbus-serialbattery/bms/jkbms.py
@@ -343,6 +343,8 @@ def read_serial_data_jkbms(self, command: str) -> bool:
 
         s = sum(data[0:-4])
 
+        logger.debug("bytearray: " + utils.bytearray_to_string(data))
+
         if start == 0x4E57 and end == 0x68 and s == crc_lo:
             return data[10 : length - 7]
         elif s != crc_lo:
diff --git a/etc/dbus-serialbattery/bms/jkbms_brn.py b/etc/dbus-serialbattery/bms/jkbms_brn.py
index 5c118cf7..b4f6fb38 100644
--- a/etc/dbus-serialbattery/bms/jkbms_brn.py
+++ b/etc/dbus-serialbattery/bms/jkbms_brn.py
@@ -10,8 +10,12 @@
     import logging
 
     logger = logging.basicConfig(level=logging.DEBUG)
+
+    def bytearray_to_string(data):
+        return "".join("\\x" + format(byte, "02x") for byte in data)
+
 else:
-    from utils import logger
+    from utils import bytearray_to_string, logger
 
 # zero means parse all incoming data (every second)
 CELL_INFO_REFRESH_S = 0
@@ -358,8 +362,7 @@ def assemble_frame(self, data: bytearray):
 
     def ncallback(self, sender: int, data: bytearray):
         logger.debug(f"--> NEW PACKAGE! lenght:  {len(data)}")
-        logger.debug("ncallback(): data")
-        logger.debug(data)
+        logger.debug("ncallback(): " + bytearray_to_string(data))
         self.assemble_frame(data)
 
     def crc(self, arr: bytearray, length: int) -> int:
diff --git a/etc/dbus-serialbattery/bms/lltjbd.py b/etc/dbus-serialbattery/bms/lltjbd.py
index 5c658fac..24399a40 100644
--- a/etc/dbus-serialbattery/bms/lltjbd.py
+++ b/etc/dbus-serialbattery/bms/lltjbd.py
@@ -610,13 +610,13 @@ def read_hardware_data(self):
 
     @staticmethod
     def validate_packet(data):
-        if not data:
-            return False
-
         if data is False:
             return False
 
         start, op, status, payload_length = unpack_from("BBBB", data)
+
+        logger.debug("bytearray: " + utils.bytearray_to_string(data))
+
         if start != 0xDD:
             logger.error(
                 ">>> ERROR: Invalid response packet. Expected begin packet character 0xDD"
diff --git a/etc/dbus-serialbattery/dbus-serialbattery.py b/etc/dbus-serialbattery/dbus-serialbattery.py
index e4bde35e..69c90437 100644
--- a/etc/dbus-serialbattery/dbus-serialbattery.py
+++ b/etc/dbus-serialbattery/dbus-serialbattery.py
@@ -96,7 +96,9 @@ def get_battery(_port) -> Union[Battery, None]:
                         "Testing "
                         + test["bms"].__name__
                         + (
-                            ' at address "' + f"\\x{bytes(test['address']).hex()}" + '"'
+                            ' at address "'
+                            + utils.bytearray_to_string(test["address"])
+                            + '"'
                             if "address" in test
                             else ""
                         )
diff --git a/etc/dbus-serialbattery/utils.py b/etc/dbus-serialbattery/utils.py
index a609225a..19b01a24 100644
--- a/etc/dbus-serialbattery/utils.py
+++ b/etc/dbus-serialbattery/utils.py
@@ -37,7 +37,7 @@ def _get_list_from_config(
 
 
 # Constants
-DRIVER_VERSION = "1.0.20231102dev"
+DRIVER_VERSION = "1.0.20231103dev"
 zero_char = chr(48)
 degree_sign = "\N{DEGREE SIGN}"
 
@@ -318,6 +318,10 @@ def kelvin_to_celsius(kelvin_temp):
     return kelvin_temp - 273.1
 
 
+def bytearray_to_string(data):
+    return "".join("\\x" + format(byte, "02x") for byte in data)
+
+
 def format_value(value, prefix, suffix):
     return (
         None