feat:优化蓝牙工具，android 低配手机新增保底逻辑

lib/blue/blue_manage.dart

@@ -71,6 +71,7 @@ class BlueManage {
   // 保存上一次的数据，用来判断是否收到重复的数据
   List<int> lastTimeData = <int>[];
   int? dataLen;
+  Timer? scanSingleTimer;
 
   static BlueManage? _manager;
 
@@ -322,10 +323,13 @@ class BlueManage {
         !isExistDevice &&
         isCurrentDevice &&
         mac != null) {
+      scanSingleTimer?.cancel();
       //兼容android 的低配手机
       await doNotSearchBLE(mac, connectStateCallBack);
-      await Future<dynamic>.delayed(3.seconds);
-      startScanSingle(deviceName, 15, (List<ScanResult> scanDevices) => null);
+      scanSingleTimer = Timer(3.seconds, () {
+        scanSingleTimer?.cancel();
+        startScanSingle(deviceName, 15, (List<ScanResult> scanDevices) => null);
+      });
     } else if (isAddEquipment == false && isExistDevice == false) {
       //取消缓存直接使用，存在配对场景设备信息会更变
       startScanSingle(deviceName, 15, (List<ScanResult> scanDevices) {
@@ -436,7 +440,7 @@ class BlueManage {
   //直接给蓝牙设备写入
   Future<void> doNotSearchBLE(
       String masAdds, ConnectStateCallBack connectStateCallBack) async {
-    // FlutterBluePlus.setLogLevel(LogLevel.debug);
+    await FlutterBluePlus.stopScan();
     final BluetoothDevice device = BluetoothDevice.fromId(masAdds);
     // 重连三次
     const int maxAttempts = 3;