Lego Mindstorm：连接到 Lego Brick 对象后无法观察操作

Question

成功连接乐高积木后无法观察到任何操作

此代码有效：

let brick = Brick(BluetoothCommunication "COM3")
let result = brick.ConnectAsync().RunSynchronously

但是，我无法观察到连续命令（即声音和电机）的任何确认。

客户代码：

open MyLego.Core

[<EntryPoint>]
let main argv = 

    let example = LegoExample()
    0 // return an integer exit code

域逻辑

namespace MyLego.Core

open Lego.Ev3.Core
open Lego.Ev3.Desktop

type LegoExample() = 

    let volume = 100
    let frequency = 1000
    let duration = 300
    let power = 50
    let breakSetting = false

    let brick = Brick(BluetoothCommunication "COM3")
    do brick.BrickChanged.Add(fun e -> printfn "Brick changed")

    let result = brick.ConnectAsync().RunSynchronously

    let move = brick.DirectCommand.TurnMotorAtPowerForTimeAsync(
                    OutputPort.B ||| OutputPort.C, power, uint32 duration, breakSetting).RunSynchronously

    let playTone = brick.DirectCommand.PlayToneAsync(
                        volume, uint16 frequency, uint16 duration).RunSynchronously

请注意，我正在构造函数中执行所有这些操作。可以吗？

我参考了以下文档：

Video

Windows client

Answer 1

原来是蓝牙连接问题

当我使用 USB 时，我观察到了预期的行为。

显然以下异常被吞没了：

"there is no user session key for the specified logon session"

但是，此异常仅在 C# 实现中出现。

Lego Mindstorm：连接到 Lego Brick 对象后无法观察操作

Lego Mindstorm: Unable to observe operations after connecting to Lego Brick object

f#

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