started writing api for desktop app

desktop_app/api/node.py

@@ -0,0 +1,18 @@
+from enum import Enum
+from bleak import BLEDevice, BleakScanner
+
+NODE_BLUETOOTH_SERVICE_UUID = "E1898FF7-5063-4441-a6eb-526073B00001"
+
+
+class MeshNode:
+    def __init__(self, ble_device: BLEDevice):
+        self.ble_device = ble_device
+        
+    async def discover():
+        """Find a mesh node via Bluetooth
+        """
+        devices = await BleakScanner(service_uuids=[NODE_BLUETOOTH_SERVICE_UUID], scanning_mode="pasive")
+        
+        # no device was found
+        if len(devices) == 0:
+            return None