Core Bluetooth - Communicate with LED Light

Question

I am working on Core Bluetooth communicate with LED Light. When peripheral write the value to communication, take some time to get response from hardware(LED).As we are using UISLider to write values we are facing delay in hardware. I think a queue occur whenever we are moving slider fast. How can i fix this delay?

    let slider0:UInt8 = UInt8(sliderBrightness.value) // Brightness
    let slider1:UInt8 = UInt8(mode) // Mode
    let slider2:UInt8 = UInt8(sliderDirection.value) // Direction
    let slider3:UInt8 = UInt8(sliderStrength.value) // Strength
    let slider4:UInt8 = UInt8(sliderWhite.value) // Neutral LED Dimming
    let slider5:UInt8 = UInt8(sliderOrange.value) // Warm LED Dimming
    let slider6:UInt8 = UInt8(mode == 3 ? sliderOrbit.value : sliderOnTime.value)  // According to Mode
    let slider7:UInt8 = UInt8(sliderOffTime.value) // According to Mode
    let slider8:UInt8 = UInt8(255)
    let buff: [UInt8] = [slider0,slider1,slider2,slider3,slider4,slider5,slider6,slider7,slider8]
    
    let data = Data(bytes: buff, count: buff.count)
    let sliderVal = Int(sender?.value ?? 0.0)
    guard let char  = ledChar else {return}
    if sender == nil || sliderVal % 1 == 0 {
        print(sliderVal)
        
        if sender != nil, previousValue == sliderVal {
            return
        }
        previousValue = sliderVal
        pendingRequestWorkItem?.cancel()

        let requestWorkItem = DispatchWorkItem { [weak self] in
            self?.writeLEDValueToChar( withCharacteristic: char, withValue: data)
        }

        pendingRequestWorkItem = requestWorkItem
        DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(12),
                                      execute: requestWorkItem)