iphone – iOS蓝牙LE peripheralManager didReceiveWriteRequest

// Processes write command received from a central.
- (void)peripheralManager:(CBPeripheralManager *)peripheral didReceiveWriteRequests:(NSArray *)requests
{

    CBATTRequest*       request = [requests  objectAtIndex: 0];
    NSData*             request_data = request.value;
    CBCharacteristic*   write_char = request.characteristic;
    //CBCentral*            write_central = request.central;
    //NSUInteger            multi_message_offset = request.offset;

    // Face commands this PWR RX to advertise serno UUID?
    int total_write_requests = 0;
    if([ write_char.UUID isEqual: [CBUUID UUIDWithString: YOUR_CHARACTERISTIC_UUID]] )
    {


        // Read desired new_state data from central:
        unsigned char* new_state = (unsigned char*)[request_data   bytes];
        my_new_state = new_state[0];
        #endif
        NSLog(@"        - advertise serno UUID: %s",my_new_state ? "TRUE" : "FALSE" );

        // Select UUID that includes serno of PWR RX,for advertisements:

        ++total_write_requests;
    }

    if( total_write_requests )
        [peripheral respondToRequest:request    withResult:CBATTErrorSuccess];  // result = success
    else
    {
        NSLog(@"_no_write_request_FAULT !!");
    }
}