how to update BLE device name in ios swift !

[Vijyendra]

I would like to update ble device name from device1 to user2. How i can do this in swift language . i m atrung to update by ios app.

is below way is right? but not able to update

let hexData = "user2"?.dataFromHexString()

peripheral.writeValue(data, forCharacteristic: characteric, type: CBCharacteristicWriteType.WithResponse)

[Vijyendra]

Thanks All,

Successfully updated device name, aplha value and date on ble device...just was missing sequence :(

Below is the code: for future reference

@IBAction func updateDevicePressed(){

    self.showActivityView()
    self.updateButton.isEnabled = false
    
    DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
        self.updateRegistrationNumber()
    }
}

func updateRegistrationNumber(){
    
    let hexValReg = deviceName.unicodeScalars.filter { $0.isASCII }.map { String(format: "%X", $0.value) }.joined()
    print(hexValReg)
    let regData = self.dataWithHexString(hex: hexValReg)// 50756E65 pune
    
    deviceNameCharacterToUpdate?.service.peripheral.writeValue(regData as Data, for: deviceNameCharacterToUpdate!, type: CBCharacteristicWriteType.withResponse)
    
    DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
        self.updateLocation()
    } 
}

func updateLocation(){
    
    let hex = location.unicodeScalars.filter { $0.isASCII }.map { String(format: "%X", $0.value) }.joined()
    let dataLoca = self.dataWithHexString(hex: hex)

    locationCharacterToUpdate?.service.peripheral.writeValue(dataLoca as Data, for: locationCharacterToUpdate!, type: CBCharacteristicWriteType.withResponse)
  
    DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
        self.updateExpireDate()
    }
}

func updateExpireDate(){
    
    let data = self.dataWithHexString(hex: hexDateToWrite)// 5976C3A3
    dateCharacterToUpdate?.service.peripheral.writeValue(data, for: dateCharacterToUpdate!, type: CBCharacteristicWriteType.withResponse)

          self.updateButton.isEnabled = true
          self.hideActivityView()

}