nrf52 iOS sdk14.2 swift - writeValue works for UInt8 but not UInt16

[Bryan H]

Hoping to get some help. Using swift3 and xcode 9.3.

I can write data from iPhone back to nrf52 peripheral fine if it is a Dbl.

When I try to write a UInt16, it crashes.

Here is the code that works for Dbl:

row = 10
let bytes : [UInt8] = [Uint8(row)]
let data = Data(bytes:bytes)
self.bluetoothManager.connectedPeripheral?.writeValue(data, for: self.rowCharacteristic!, type: CBCharacteristicWriteType.withResponse)

Here is my code I tried for UInt16 (reading is UInt16):

reading = 8855
let bytes : [UInt8] = [Uint16(reading)]
let data = Data(bytes:bytes)
self.bluetoothManager.connectedPeripheral?.writeValue(data, for: self.rowCharacteristic!, type: CBCharacteristicWriteType.withResponse)

Thank you

[Bryan H]

I fixed this by splitting the UInt16 into 2 Uint8:

let UInt8Value0 = reading >> 8
let UInt8Value1 = Uint8(reading & 0x00ff)
let bytes = [Uint8] = [ UInt8Value1, UInt8Value0 ]
let data = Data(bytes:bytes)
self.bluetoothManager.connectedPeripheral?.writeValue(data, for: self.rowCharacteristic!, type: CBCharacteristicWriteType.withResponse)