diff --git a/app/src/main/java/com/example/hpostesting/data/constant/HemoCubeCommands.kt b/app/src/main/java/com/example/hpostesting/data/constant/HemoCubeCommands.kt
index 28acdab..9cf44a6 100644
--- a/app/src/main/java/com/example/hpostesting/data/constant/HemoCubeCommands.kt
+++ b/app/src/main/java/com/example/hpostesting/data/constant/HemoCubeCommands.kt
@@ -5,4 +5,5 @@ enum class HemoCubeCommands(val command: String) {
     getBuffer("D\r"),
     startSample("S\r"),
     getSample("P\r"),
+    getDeviceId("I\r"),
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/example/hpostesting/presentation/diagnostics/DiagnosticsFragment.kt b/app/src/main/java/com/example/hpostesting/presentation/diagnostics/DiagnosticsFragment.kt
index 1b949a6..3d51759 100644
--- a/app/src/main/java/com/example/hpostesting/presentation/diagnostics/DiagnosticsFragment.kt
+++ b/app/src/main/java/com/example/hpostesting/presentation/diagnostics/DiagnosticsFragment.kt
@@ -59,6 +59,7 @@ class DiagnosticsFragment : Fragment() {
 
     private fun initViews() {
         listenToHemoCube()
+        getDeviceId()
         binding.btnSubmit.setOnClickListener {
             binding.btnSubmit.visibility = View.GONE
             getBufferdiagnostics()
@@ -95,6 +96,32 @@ class DiagnosticsFragment : Fragment() {
         }
     }
 
+    private fun getDeviceId() {
+        diagnosticsViewModel.progressBar.postValue(true)
+        (activity as DiagnosticsActivity).mService.sendAndListenToHemoCube(
+            HemoCubeCommands.getDeviceId,
+            object : UsbServiceListener {
+                override fun onUsbRead(data: ByteArray?) {
+                    data?.let {
+                        val stringData = String(it)
+                        diagnosticsViewModel.messages.postValue(stringData)
+                        val pattern = Regex("([A-Z]+)\\s(\\d+)")
+                        val matchResult = pattern.find(stringData)
+                        if (matchResult != null) {
+                            val (sn, hardwareId) = matchResult.destructured
+                            with(sharedPreferences.edit()) {
+                                putString(com.example.hpostesting.data.constant.Constants.DEVICE_ID, hardwareId)
+                                apply()
+                            }
+                        }
+                        binding.tvSubtitle4.text = stringData
+                    }
+                }
+                override fun onUsbError(e: Exception?) {
+                    diagnosticsViewModel.progressBar.postValue(false)
+                }
+            })
+    }
 
     private fun getBufferdiagnostics() {
         diagnosticsViewModel.progressBar.postValue(true)