diff --git a/HDFwear/OTA/LETransceiver.h b/HDFwear/OTA/LETransceiver.h
index c797480..fb2580d 100644
--- a/HDFwear/OTA/LETransceiver.h
+++ b/HDFwear/OTA/LETransceiver.h
@@ -17,42 +17,15 @@ NS_ASSUME_NONNULL_BEGIN
 #define KeyIndicateCharacteristicUUID   @"kIndicateCharacteristicUUID"
 
 @protocol LEConnctionDelegate <NSObject>
-//
-//@required
-//- (void)onFoundPeripheral:(CBPeripheral *) peripheral advertisementData:(NSDictionary *) advertisementData;
-//
-//@optional
 - (void)onConnectedPeripheral:(CBPeripheral *) peripheral;
-//- (void)onDisconnectedPeripheral:(CBPeripheral *) peripheral;
-//
-@end
-
-@protocol LEDataDelegate <NSObject>
-
-@optional
-
-- (void)onDataReceive:(NSData *) data;
-
 @end
 
 @interface LETransceiver : NSObject
-
 @property (weak, nonatomic) id<LEConnctionDelegate> connectionDelegate;
-@property (weak, nonatomic) id<LEDataDelegate> dataDelegate;
-
-//- (void)setUUIDs:(NSDictionary *) uuids;
-
-//- (void)scanStart;
-//- (void)scanStop;
-
-//- (void)connect:(CBPeripheral *)peripheral;
-//- (void)disconnect:(CBPeripheral *)peripheral;
-
 - (void)write:(NSData *) data;
 - (void)write:(NSData *) data index:(int) i;
 
 // for BluetoothManager to call
-@property (weak, nonatomic) CBCentralManager *centralManager;
 - (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(nullable NSError *)error;
 - (void)closeOTA;
 @end
diff --git a/HDFwear/OTA/LETransceiver.m b/HDFwear/OTA/LETransceiver.m
index 1cb3891..ca3086d 100644
--- a/HDFwear/OTA/LETransceiver.m
+++ b/HDFwear/OTA/LETransceiver.m
@@ -62,49 +62,6 @@
     }
 }
 
-//- (void)scanStart {
-//    NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:NO], CBCentralManagerScanOptionAllowDuplicatesKey, nil];
-//    /*
-//    NSMutableArray *servicesUUID = [[NSMutableArray alloc] init];
-//    if (writeServiceUUID)
-//        [servicesUUID addObject:writeServiceUUID];
-//    if (indicateServiceUUID)
-//        [servicesUUID addObject:indicateServiceUUID];
-//    */
-//    [self.centralManager scanForPeripheralsWithServices:nil options:options];
-//}
-
-//- (void)scanStop {
-//    [self.centralManager stopScan];
-//}
-
-//- (void)connect:(CBPeripheral *)peripheral {
-//    [self scanStop];
-//    
-//    [self.centralManager connectPeripheral:peripheral options:@{CBConnectPeripheralOptionNotifyOnConnectionKey:@YES}];
-//    
-//    if (connectTimer) {
-//        [connectTimer invalidate];
-//    }
-//    connectTimer = [NSTimer scheduledTimerWithTimeInterval:20.0 target:self selector:@selector(connectTimeout:) userInfo:peripheral repeats:NO];
-//}
-
-//- (void)disconnect:(CBPeripheral *)peripheral {
-//    if (![self isPeripheralConnected:peripheral]) {
-//        return;
-//    }
-//    
-//    NSLog(@"disconnect %@", peripheral.name);
-//    [self.centralManager cancelPeripheralConnection:peripheral];
-//}
-
-//- (BOOL) isPeripheralConnected:(CBPeripheral *) peripheral {
-//    if (peripheral.state == CBPeripheralStateConnected) {
-//        return YES;
-//    }
-//    return NO;
-//}
-
 - (NSUInteger) getMtuForType:(CBCharacteristicWriteType) type {
     return [connectedPeripheral maximumWriteValueLengthForType:type];
 }
@@ -143,99 +100,6 @@
     }
 }
 
-//- (void)connectTimeout:(NSTimer *)timer {
-//    CBPeripheral *peripheral = (CBPeripheral *)[timer userInfo];
-//    [self disconnect:peripheral];
-//}
-
-//#pragma mark -- CBCentralManagerDelegate
-//- (void)centralManagerDidUpdateState:(CBCentralManager *)central {
-//    NSString *messtoshow;
-//    switch (central.state) {
-//        case CBManagerStatePoweredOn:{
-//            messtoshow=[NSString stringWithFormat:@"CBCentralManagerStatePoweredOn"];
-//            [self scanStart];
-//            break;
-//        }
-//        case CBManagerStateUnknown:
-//        {
-//            messtoshow=[NSString stringWithFormat:@"State unknown, update imminent"];
-//            break;
-//        }
-//        case CBManagerStateResetting:
-//        {
-//            messtoshow=[NSString stringWithFormat:@"The connection with the system service was momentarily lost, update imminent."];
-//            break;
-//        }
-//        case CBManagerStateUnsupported:
-//        {
-//            messtoshow=[NSString stringWithFormat:@"The platform doesn't support Bluetooth Low Energy"];
-//            break;
-//        }
-//        case CBManagerStateUnauthorized:
-//        {
-//            messtoshow=[NSString stringWithFormat:@"The app is not authorized to use Bluetooth Low Energy"];
-//            break;
-//        }
-//        case CBManagerStatePoweredOff:
-//        {
-//            [self disconnect:connectedPeripheral];
-//            
-//            messtoshow=[NSString stringWithFormat:@"Bluetooth is currently powered off"];
-//            break;
-//        }
-//        default:
-//            break;
-//    }
-//    NSLog(@"%@",messtoshow);
-//}
-
-//- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI{
-////    NSLog(@"didDiscoverPeripheral: %@", peripheral);
-//    
-//    if(_connectionDelegate && [_connectionDelegate respondsToSelector:@selector(onFoundPeripheral:advertisementData:)]) {
-//        [_connectionDelegate onFoundPeripheral:peripheral advertisementData:advertisementData];
-//    }
-//}
-
-//- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral{
-//    NSLog(@"didConnectPeripheral: %@", peripheral.name);
-//    
-//    peripheral.delegate = self;
-//    [peripheral discoverServices:nil];
-//}
-
-//- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{
-//    NSLog(@"Fail to connect: %@", peripheral.name);
-//}
-
-//- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{
-//    NSLog(@"didDisconnectPeripheral %@, error: %@",peripheral, error);
-//    
-//    connectedPeripheral = nil;
-//    characteristicWrite = nil;
-//    characteristicIndicate = nil;
-//    if(_connectionDelegate && [_connectionDelegate respondsToSelector:@selector(onDisconnectedPeripheral:)]) {
-//        [_connectionDelegate onDisconnectedPeripheral:peripheral];
-//    }
-//}
-
-//#pragma mark -- CBPeripheralDelegate
-//- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{
-//    NSLog(@"didDiscoverServices: %@", peripheral.name);
-//    if (error) {
-//        NSLog(@"Error discovering service:%@", [error localizedDescription]);
-//        return;
-//    }
-//    
-//    for (CBService *service in peripheral.services) {
-//        
-//        NSLog(@"service: %@", service);
-//        [peripheral discoverCharacteristics:nil forService:service];
-//    }
-//    
-//}
-
 - (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error{
     NSLog(@"didDiscoverCharacteristicsForService: %@, %@", peripheral.name, service.UUID.UUIDString);
     if (error) {
@@ -275,29 +139,4 @@
     }
 }
 
-//- (void)peripheral:(CBPeripheral *)peripheral didReadRSSI:(NSNumber *)RSSI error:(nullable NSError *)error {
-//    
-//}
-
-//- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
-//    
-//    if (error) {
-//        NSLog(@"%@,%@,Error didWriteValueForCharacteristic:%@",characteristic.UUID,[characteristic value], [error localizedDescription]);
-//        return;
-//    }
-//    
-//}
-
-//- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
-//    if (error) {
-//        NSLog(@"Error didUpdateValueForCharacteristic:%@", [error localizedDescription]);
-//        return;
-//    }
-//    NSLog(@"didUpdateValueForCharacteristic: %@  %@", characteristic.UUID, characteristic.value);
-//    
-//    if (_dataDelegate && [_dataDelegate respondsToSelector:@selector(onDataReceive:)]) {
-//        [_dataDelegate onDataReceive:[characteristic value]];
-//    }
-//}
-
 @end