diff --git a/app/src/test/java/com/example/hpostesting/HemoCubeFragmentTest.kt b/app/src/test/java/com/example/hpostesting/HemoCubeFragmentTest.kt
index 6c5e826..aec7b3c 100644
--- a/app/src/test/java/com/example/hpostesting/HemoCubeFragmentTest.kt
+++ b/app/src/test/java/com/example/hpostesting/HemoCubeFragmentTest.kt
@@ -5,6 +5,8 @@ import com.example.hpostesting.presentation.hemocube.HemoCubeFragment
 import com.example.hpostesting.presentation.hemocube.HemocubeActivity
 import `in`.sminnovations.hpostesting.databinding.FragmentHemoCubeReferenceBinding
 import junit.framework.TestCase
+import junit.framework.TestCase.assertEquals
+import junit.framework.TestCase.assertNull
 import org.junit.Before
 import org.junit.Test
 import org.mockito.ArgumentMatchers
@@ -42,7 +44,7 @@ class HemoCubeFragmentTest {
         ).thenReturn("dummy_value")
 
         // Act
-        val deviceId = hemoCubeFragment.extractMiddleString("SNS HPP1-9000 SNE")
+        val deviceId = hemoCubeFragment.extractV2HardwareId("SNS HPP1-9000 SNE")
 
         // Assert
         TestCase.assertEquals("HPP1-9000", deviceId)
@@ -81,4 +83,186 @@ class HemoCubeFragmentTest {
         TestCase.assertEquals(true, result)
         TestCase.assertEquals(hemoCubeFragment.allReadingsComplete(0, 1), false)
     }
+
+    @Test
+    fun `extractV1HardwareId should return hardware ID when input contains SN`() {
+        // Arrange
+        val input = "Some text SN ABC123 some more text"
+
+        // Act
+        val result = hemoCubeFragment.extractV1HardwareId(input)
+
+        // Assert
+        assertEquals("ABC123", result)
+    }
+
+    @Test
+    fun `extractV1HardwareId should return null when input does not contain SN`() {
+        // Arrange
+        val input = "Some text without SN"
+
+        // Act
+        val result = hemoCubeFragment.extractV1HardwareId(input)
+
+        // Assert
+        assertNull(result)
+    }
+
+    @Test
+    fun `extractV1HardwareId should return null when input is empty`() {
+        // Arrange
+        val input = ""
+
+        // Act
+        val result = hemoCubeFragment.extractV1HardwareId(input)
+
+        // Assert
+        assertNull(result)
+    }
+
+    @Test
+    fun `extractV1HardwareId should return null when input is null`() {
+        // Arrange
+        val input: String? = null
+
+        // Act
+        val result = input?.let { hemoCubeFragment.extractV1HardwareId(it) }
+
+        // Assert
+        assertNull(result)
+    }
+
+    @Test
+    fun `extractV1HardwareId should return hardware ID when input contains SN in a specific format`() {
+        // Arrange
+        val input = """
+            SN HCV-000-3001
+            #BS
+            #BC
+            #SS
+            #SC
+            RESULT
+            LB1 20636.32
+            LB2 15855.67
+            LB3 21801.36
+            LB4 18362.33
+            LS1 17287
+            LS2 14855.67
+            LS3 15282.31
+            LS4 9737.98
+            REND
+        """.trimIndent()
+
+        // Act
+        val result = hemoCubeFragment.extractV1HardwareId(input)
+
+        // Assert
+        assertEquals("HCV-000-3001", result)
+    }
+
+    @Test
+    fun `extractV2HardwareId should return the correct hardware ID when it exists in the input`() {
+        // Arrange
+        val input = "SNS ABC123 SNE"
+
+        // Act
+        val result = hemoCubeFragment.extractV2HardwareId(input)
+
+        // Assert
+        assertEquals("ABC123", result)
+    }
+
+    @Test
+    fun `extractV2HardwareId should return null when no hardware ID is found in the input`() {
+        // Arrange
+        val input = "No hardware ID in this input"
+
+        // Act
+        val result = hemoCubeFragment.extractV2HardwareId(input)
+
+        // Assert
+        assertNull(result)
+    }
+
+    @Test
+    fun `extractV2HardwareId should handle whitespace around the hardware ID`() {
+        // Arrange
+        val input = "SNS   XYZ789    SNE"
+
+        // Act
+        val result = hemoCubeFragment.extractV2HardwareId(input)
+
+        // Assert
+        assertEquals("XYZ789", result)
+    }
+
+    @Test
+    fun `extractV2HardwareId should handle provided input string with HCV-000-3013`() {
+        // Arrange
+        val input = "SNS HCV-000-3013 SNE\n" +
+                "#SS1\n" +
+                "#SC1\n" +
+                "RESULT \n" +
+                "LB1 23411.00\n" +
+                "LB2 21417.00\n" +
+                "LB3 23869.00\n" +
+                "LB4 24967.00\n" +
+                "LS1 3401.00\n" +
+                "LS2 1107.00\n" +
+                "LS3 14410.00\n" +
+                "LS4 15047.00\n" +
+                "REND\n"
+
+        // Act
+        val result = hemoCubeFragment.extractV2HardwareId(input)
+
+        // Assert
+        assertEquals("HCV-000-3013", result)
+    }
+
+    @Test
+    fun `extractV2HardwareId should handle provided input string with HPP1-4001`() {
+        // Arrange
+        val input = "SNS HPP1-4001 SNE#SS1\n" +
+                "#SC1\n" +
+                "RESULT\n" +
+                "LB1 23777\n" +
+                "LB2 24130\n" +
+                "LB3 23442\n" +
+                "LB4 23945\n" +
+                "LS1 2521\n" +
+                "LS2 973\n" +
+                "LS3 10252\n" +
+                "LS4 11017\n" +
+                "REND\n"
+
+        // Act
+        val result = hemoCubeFragment.extractV2HardwareId(input)
+
+        // Assert
+        assertEquals("HPP1-4001", result)
+    }
+
+    @Test
+    fun `extractV2HardwareId should handle provided input string with HPP1-000-4001`() {
+        // Arrange
+        val input = "SNS HPP1-000-4001 SNE#SS1\n" +
+                "#SC1\n" +
+                "RESULT\n" +
+                "LB1 23777\n" +
+                "LB2 24130\n" +
+                "LB3 23442\n" +
+                "LB4 23945\n" +
+                "LS1 2521\n" +
+                "LS2 973\n" +
+                "LS3 10252\n" +
+                "LS4 11017\n" +
+                "REND\n"
+
+        // Act
+        val result = hemoCubeFragment.extractV2HardwareId(input)
+
+        // Assert
+        assertEquals("HPP1-000-4001", result)
+    }
 }
\ No newline at end of file