API updates for functional code

house-plant-api/Services/BluetoothService.cs

@@ -0,0 +1,53 @@
+namespace house_plant_api.Services
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+    using System.Threading.Tasks;
+    using house_plant_api.Models;
+    using InTheHand.Bluetooth;
+
+    public class BluetoothService
+    {
+        private readonly Guid _serviceUuid = Guid.Parse("12345678-1234-1234-1234-123456789abc");
+        private readonly Guid _characteristicUuid = Guid.Parse("abcd1234-5678-1234-5678-abcdef123456");
+
+        public async Task<IReadOnlyCollection<BluetoothDevice>> ScanDevicesAsync()
+        {
+            // Scan for BLE devices
+            return await Bluetooth.ScanForDevicesAsync();
+        }
+
+        public async Task<int> GetSoilMoistureAsync(string deviceName)
+        {
+            // 1. Scan for devices and match by name
+            var devices = await Bluetooth.ScanForDevicesAsync();
+            var targetDevice = devices.FirstOrDefault(d => d.Name == deviceName);
+
+            if (targetDevice == null)
+                throw new Exception($"Device '{deviceName}' not found.");
+
+            // 2. Connect and read moisture
+            await targetDevice.Gatt.ConnectAsync();
+            try
+            {
+                var services = await targetDevice.Gatt.GetPrimaryServicesAsync();
+                var targetService = services.FirstOrDefault(s => s.Uuid == _serviceUuid);
+                if (targetService == null)
+                    throw new Exception("Moisture service not found.");
+
+                var characteristics = await targetService.GetCharacteristicsAsync();
+                var targetCharacteristic = characteristics.FirstOrDefault(c => c.Uuid == _characteristicUuid);
+                if (targetCharacteristic == null)
+                    throw new Exception("Moisture characteristic not found.");
+
+                var value = await targetCharacteristic.ReadValueAsync();
+                return BitConverter.ToInt32(value, 0);
+            }
+            finally
+            {
+                targetDevice.Gatt.Disconnect();
+            }
+        }
+    }
+}