feat: decode demo characteristic

app/src/main/java/com/example/sensortestingapp/ConnectionManager.kt

@@ -64,6 +64,15 @@ data class DiscoverServicesRequest(
 ) : BleOperationType()
 
 
+open class BleListener {
+    open fun onSuccessfulCharRead(
+        gatt: BluetoothGatt,
+        characteristic: BluetoothGattCharacteristic
+    ) {
+    }
+}
+
+
 private fun BluetoothGatt.printGattTable() {
     if (services.isEmpty()) {
         Log.i(
@@ -106,6 +115,16 @@ object ConnectionManager {
     private val deviceGattMap = ConcurrentHashMap<BluetoothDevice, BluetoothGatt>()
     private val operationQueue = ConcurrentLinkedQueue<BleOperationType>()
     private var pendingOperation: BleOperationType? = null
+    private var listeners = ArrayList<BleListener>()
+
+
+    fun register(listener: BleListener) {
+        listeners.add(listener)
+    }
+
+    private fun notifyListeners(notifier: (listener: BleListener) -> Unit) {
+        listeners.forEach(notifier)
+    }
 
 
     fun connect(device: BluetoothDevice, context: Context) {
@@ -310,6 +329,12 @@ object ConnectionManager {
                             "ConnectionManager",
                             "Read characteristic $uuid (service: ${service.uuid}): ${value.toHexString()}"
                         )
+                        notifyListeners { listener ->
+                            listener.onSuccessfulCharRead(
+                                gatt,
+                                characteristic
+                            )
+                        }
                     }
 
                     BluetoothGatt.GATT_READ_NOT_PERMITTED -> {

app/src/main/java/com/example/sensortestingapp/MainActivity.kt

@@ -5,6 +5,8 @@ import android.annotation.SuppressLint
 import android.app.Activity
 import android.app.AlertDialog
 import android.bluetooth.BluetoothAdapter
+import android.bluetooth.BluetoothGatt
+import android.bluetooth.BluetoothGattCharacteristic
 import android.bluetooth.BluetoothManager
 import android.bluetooth.le.ScanCallback
 import android.bluetooth.le.ScanResult
@@ -26,6 +28,7 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import androidx.recyclerview.widget.SimpleItemAnimator
 import com.example.sensortestingapp.databinding.ActivityMainBinding
+import com.punchthrough.blestarterappandroid.ble.BleListener
 import com.punchthrough.blestarterappandroid.ble.ConnectionManager
 import java.nio.ByteBuffer
 import java.nio.ByteOrder
@@ -139,6 +142,20 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
+    private val bleListener = object : BleListener() {
+        override fun onSuccessfulCharRead(
+            gatt: BluetoothGatt,
+            characteristic: BluetoothGattCharacteristic
+        ) {
+
+            if (characteristic.service.uuid == DEMO_SERVICE_UUID && characteristic.uuid == DEMO_CHAR_UUID) {
+                val payload = decodeDemoPayload(characteristic.value)
+                Log.i("BleListener", "Demo char received: $payload")
+
+            }
+        }
+    }
+
 
     override fun onCreate(savedInstanceState: Bundle?) {
         WindowCompat.setDecorFitsSystemWindows(window, false)
@@ -164,6 +181,8 @@ class MainActivity : AppCompatActivity() {
 
         setupRecyclerView()
 
+        ConnectionManager.register(bleListener)
+
     }
 
     private fun setupRecyclerView() {