diff --git a/common/script/script-api/src/main/java/org/thingsboard/script/api/tbel/TbUtils.java b/common/script/script-api/src/main/java/org/thingsboard/script/api/tbel/TbUtils.java
index 31bd634221..4a3f2d306b 100644
--- a/common/script/script-api/src/main/java/org/thingsboard/script/api/tbel/TbUtils.java
+++ b/common/script/script-api/src/main/java/org/thingsboard/script/api/tbel/TbUtils.java
@@ -182,12 +182,12 @@ public class TbUtils {
         return TbJson.parse(ctx, jsonStr);
     }
 
-    public static String bytesToString(List<Byte> bytesList) {
+    public static String bytesToString(List<?> bytesList) {
         byte[] bytes = bytesFromList(bytesList);
         return new String(bytes);
     }
 
-    public static String bytesToString(List<Byte> bytesList, String charsetName) throws UnsupportedEncodingException {
+    public static String bytesToString(List<?> bytesList, String charsetName) throws UnsupportedEncodingException {
         byte[] bytes = bytesFromList(bytesList);
         return new String(bytes, charsetName);
     }
@@ -210,10 +210,20 @@ public class TbUtils {
         }
     }
 
-    private static byte[] bytesFromList(List<Byte> bytesList) {
+    private static byte[] bytesFromList(List<?> bytesList) {
         byte[] bytes = new byte[bytesList.size()];
         for (int i = 0; i < bytesList.size(); i++) {
-            bytes[i] = bytesList.get(i);
+            Object objectVal = bytesList.get(i);
+            if (objectVal instanceof Integer) {
+                bytes[i] = isValidIntegerToByte((Integer) objectVal);
+            } else if (objectVal instanceof String) {
+                bytes[i] = isValidIntegerToByte(parseInt((String) objectVal));
+            } else if (objectVal instanceof Byte) {
+                bytes[i] = (byte) objectVal;
+            } else {
+                throw new NumberFormatException("The value '" + objectVal + "' could not be correctly converted to a byte. " +
+                        "Must be a HexDecimal/String/Integer/Byte format !");
+            }
         }
         return bytes;
     }
@@ -643,7 +653,7 @@ public class TbUtils {
         }
     }
 
-    public static boolean isValidRadix(String value, int radix) {
+    private static boolean isValidRadix(String value, int radix) {
         for (int i = 0; i < value.length(); i++) {
             if (i == 0 && value.charAt(i) == '-') {
                 if (value.length() == 1)
@@ -657,4 +667,12 @@ public class TbUtils {
         return true;
     }
 
+    private static byte isValidIntegerToByte (Integer val) {
+        if (val > 255 || val.intValue() < -128) {
+            throw new NumberFormatException("The value '" + val + "' could not be correctly converted to a byte. " +
+                    "Integer to byte conversion requires the use of only 8 bits (with a range of min/max = -128/255)!");
+        } else {
+            return val.byteValue();
+        }
+    }
 }
diff --git a/common/script/script-api/src/test/java/org/thingsboard/script/api/tbel/TbUtilsTest.java b/common/script/script-api/src/test/java/org/thingsboard/script/api/tbel/TbUtilsTest.java
index d2900d6ec4..7d5ae00dcf 100644
--- a/common/script/script-api/src/test/java/org/thingsboard/script/api/tbel/TbUtilsTest.java
+++ b/common/script/script-api/src/test/java/org/thingsboard/script/api/tbel/TbUtilsTest.java
@@ -31,6 +31,7 @@ import java.io.IOException;
 import java.math.BigInteger;
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Calendar;
 import java.util.List;
 import java.util.Random;
@@ -385,6 +386,95 @@ public class TbUtilsTest {
         Assert.assertThrows(IllegalAccessException.class, () -> TbUtils.stringToBytes(ctx, ((ExecutionHashMap) finalInputJson).get("hello"), "UTF-8"));
     }
 
+    @Test
+    public void bytesFromList() {
+        byte[] arrayBytes =      {(byte)0x00, (byte)0x08, (byte)0x10, (byte)0x1C, (byte)0xFF, (byte)0xFC, (byte)0xAD, (byte)0x88, (byte)0x75, (byte)0x74, (byte)0x8A, (byte)0x82};
+        Object[] arrayMix      = {    "0x00",         8,        "16",     "0x1C",        255, (byte)0xFC,        173,        136,        117,        116,       -118,     "-126"};
+
+        String expected = new String(arrayBytes);
+        ArrayList<Byte> listBytes = new ArrayList<>(arrayBytes.length);
+        for (Byte element : arrayBytes) {
+            listBytes.add(element);
+        }
+        Assert.assertEquals(expected, TbUtils.bytesToString(listBytes));
+
+        ArrayList<Object> listMix = new ArrayList<>(arrayMix.length);
+        for (Object element : arrayMix) {
+            listMix.add(element);
+        }
+        Assert.assertEquals(expected, TbUtils.bytesToString(listMix));
+    }
+
+    @Test
+    public void bytesFromList_Error() {
+        List<String> listHex = new ArrayList<>();
+        listHex.add("0xFG");
+        try {
+            TbUtils.bytesToString(listHex);
+            Assert.fail("Should throw NumberFormatException");
+        } catch (NumberFormatException e) {
+            Assert.assertTrue(e.getMessage().contains("Failed radix: [16] for value: \"FG\"!"));
+        }
+        listHex.add(0, "1F");
+        try {
+            TbUtils.bytesToString(listHex);
+            Assert.fail("Should throw NumberFormatException");
+        } catch (NumberFormatException e) {
+            Assert.assertTrue(e.getMessage().contains("Failed radix: [10] for value: \"1F\"!"));
+        }
+
+        List<String> listIntString = new ArrayList<>();
+        listIntString.add("-129");
+        try {
+            TbUtils.bytesToString(listIntString);
+            Assert.fail("Should throw NumberFormatException");
+        } catch (NumberFormatException e) {
+            Assert.assertTrue(e.getMessage().contains("The value '-129' could not be correctly converted to a byte. " +
+                    "Integer to byte conversion requires the use of only 8 bits (with a range of min/max = -128/255)!"));
+        }
+
+        listIntString.add(0, "256");
+        try {
+            TbUtils.bytesToString(listIntString);
+            Assert.fail("Should throw NumberFormatException");
+        } catch (NumberFormatException e) {
+            Assert.assertTrue(e.getMessage().contains("The value '256' could not be correctly converted to a byte. " +
+                    "Integer to byte conversion requires the use of only 8 bits (with a range of min/max = -128/255)!"));
+        }
+
+        ArrayList<Integer> listIntBytes = new ArrayList<>();
+        listIntBytes.add(-129);
+        try {
+            TbUtils.bytesToString(listIntBytes);
+            Assert.fail("Should throw NumberFormatException");
+        } catch (NumberFormatException e) {
+            Assert.assertTrue(e.getMessage().contains("The value '-129' could not be correctly converted to a byte. " +
+                    "Integer to byte conversion requires the use of only 8 bits (with a range of min/max = -128/255)!"));
+        }
+
+        listIntBytes.add(0, 256);
+        try {
+            TbUtils.bytesToString(listIntBytes);
+            Assert.fail("Should throw NumberFormatException");
+        } catch (NumberFormatException e) {
+            Assert.assertTrue(e.getMessage().contains("The value '256' could not be correctly converted to a byte. " +
+                    "Integer to byte conversion requires the use of only 8 bits (with a range of min/max = -128/255)!"));
+        }
+
+        ArrayList<Object> listObjects = new ArrayList<>();
+        ArrayList<String> listStringObjects = new ArrayList<>();
+        listStringObjects.add("0xFD");
+        listObjects.add(listStringObjects);
+        try {
+            TbUtils.bytesToString(listObjects);
+            Assert.fail("Should throw NumberFormatException");
+        } catch (NumberFormatException e) {
+            Assert.assertTrue(e.getMessage().contains("The value '[0xFD]' could not be correctly converted to a byte. " +
+                    "Must be a HexDecimal/String/Integer/Byte format !"));
+        }
+    }
+
+
     private static List<Byte> toList(byte[] data) {
         List<Byte> result = new ArrayList<>(data.length);
         for (Byte b : data) {