修改会议助手ble连接

lib/modules/meeting/controllers/meeting_connect_controller.dart

@@ -7,11 +7,17 @@ class MeetingConnectController extends GetxController {
   RxString stateStr = '搜索中...'.obs;
   RxBool isRescan = false.obs;
   RxBool isImportedFiles = false.obs;
+  RxString importedFilesStr = ''.obs;
 
   late StreamSubscription<List<ScanResult>> _scanResultsSubscription;
   late StreamSubscription<bool> _isScanningSubscription;
   BluetoothDevice? _device;
 
+  bool isScanFailed = false;
+
+  late BluetoothCharacteristic? _writeCharacteristic;
+  late StreamSubscription<List<int>>? _valueReceivedSubscription;
+
   @override
   void onInit() {
     super.onInit();
@@ -21,6 +27,11 @@ class MeetingConnectController extends GetxController {
       }
     });
     _isScanningSubscription = FlutterBluePlus.isScanning.listen((state) {
+      if (isScanFailed) {
+        stateStr.value = '搜索失败，请检查蓝牙是否开启';
+        isRescan.value = true;
+        return;
+      }
       if (!state && _device == null) {
         stateStr.value = '未搜索到 AI PEN 设备';
         isRescan.value = true;
@@ -36,12 +47,15 @@ class MeetingConnectController extends GetxController {
   void onClose() {
     _scanResultsSubscription.cancel();
     _isScanningSubscription.cancel();
+    _valueReceivedSubscription?.cancel();
     _stopScan();
     _disconnect();
     super.onClose();
   }
 
   Future<void> startScan() async {
+    try {
+      isScanFailed = false;
       await FlutterBluePlus.startScan(
         timeout: const Duration(seconds: 15),
         withServices: [
@@ -49,6 +63,9 @@ class MeetingConnectController extends GetxController {
         ],
         withNames: ['AI PEN'],
       );
+    } catch (e) {
+      isScanFailed = true;
+    }
   }
 
   Future<void> _stopScan() async {
@@ -57,6 +74,7 @@ class MeetingConnectController extends GetxController {
 
   Future<void> _connect() async {
     await _device?.connect();
+    await _discoverServices();
   }
 
   Future<void> _disconnect() async {
@@ -71,4 +89,55 @@ class MeetingConnectController extends GetxController {
       stateStr.value = '已连接到 AI PEN 设备';
     }
   }
+
+  Future<void> _discoverServices() async {
+    List<BluetoothService> services = await _device?.discoverServices() ?? [];
+    if (services.isNotEmpty) {
+      for (var element in services) {
+        if (element.serviceUuid == Guid('FFF0')) {
+          _readCharacteristics(element.characteristics);
+        }
+      }
+    }
+  }
+
+  Future<void> _readCharacteristics(
+      List<BluetoothCharacteristic> characteristics) async {
+    for (var element in characteristics) {
+      if (element.characteristicUuid == Guid('FFF1')) {
+        _writeCharacteristic = element;
+        stateStr.value = '检查是否有新文件需要导入';
+        sendData([0x5a, 0x01, 0x0d]);
+      } else if (element.characteristicUuid == Guid('FFF2')) {
+        await element.setNotifyValue(true);
+        _valueReceivedSubscription = element.onValueReceived.listen((value) {
+          _listenData(value);
+        });
+      }
+    }
+  }
+
+  Future<void> sendData(List<int> value) async {
+    await _writeCharacteristic?.write(value, withoutResponse: true);
+  }
+
+  void _listenData(List<int> value) {
+    print('----$value--------');
+    int command = value[2];
+    switch (command) {
+      case 0x0d: // 是否有导入文件
+        if (value[3] == 0x01) {
+          isImportedFiles.value = true;
+          importedFilesStr.value = '检查到有新文件，是否导入';
+        } else {
+          isImportedFiles.value = false;
+          importedFilesStr.value = '没有新文件需要导入';
+        }
+        break;
+      case 0x87: // Wi-Fi 开启/关闭
+        if (value[2] == 0x01) {}
+        break;
+      default:
+    }
+  }
 }

lib/modules/meeting/views/meeting_connect_view.dart

@@ -48,7 +48,9 @@ class MeetingConnectView extends GetView<MeetingConnectController> {
         mainAxisAlignment: MainAxisAlignment.center,
         children: [
           Obx(
-            () => Text(
+            () => Padding(
+              padding: EdgeInsets.only(bottom: 30.w),
+              child: Text(
                 controller.stateStr.value,
                 style: TextStyle(
                   fontSize: 20.sp,
@@ -57,33 +59,31 @@ class MeetingConnectView extends GetView<MeetingConnectController> {
                 ),
               ),
             ),
+          ),
           Obx(
             () => controller.isRescan.value
-                ? Padding(
+                ? _button('重新连接', Icons.refresh, onTap: () {
-                    padding: EdgeInsets.only(top: 20.w),
-                    child: _button('重新连接', Icons.refresh, onTap: () {
                     controller.startScan();
-                    }),
+                  })
-                  )
                 : const SizedBox(),
           ),
           Obx(
-            () => controller.isImportedFiles.value
+            () => Text(
-                ? Padding(
+              controller.importedFilesStr.value,
-                    padding: EdgeInsets.only(top: 30.w),
-                    child: Text(
-                      '检测到有新文件，是否导入',
               style: TextStyle(
                 fontSize: 16.sp,
                 color: isDarkMode ? Colors.white70 : Colors.black54,
               ),
             ),
-                  )
-                : const SizedBox(),
           ),
           Obx(
             () => controller.isImportedFiles.value
-                ? _button('导入文件', Icons.file_download, onTap: () {})
+                ? Padding(
+                    padding: EdgeInsets.symmetric(vertical: 10.w),
+                    child: _button('导入文件', Icons.file_download, onTap: () {
+                      controller.sendData([0x5a, 0x01, 0x0d]);
+                    }),
+                  )
                 : const SizedBox(),
           ),
         ],
@@ -97,7 +97,6 @@ class MeetingConnectView extends GetView<MeetingConnectController> {
       child: Container(
         width: 150.w,
         height: 42.w,
-        margin: EdgeInsets.symmetric(vertical: 10.w),
         decoration: BoxDecoration(
           color: Colors.black,
           borderRadius: BorderRadius.circular(42.w),