Author: Emiliano Carlesi

Create Windows bootable USB with macOS

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If you need to create a Windows 10 installation USB key using a macOS, you can use these commands to do it simply.
This procedure deletes all data from the USB stick, so be careful 🙂

Open Terminal and use the following commands

diskutil list
diskutil eraseDisk MS-DOS "WIN10" GPT <USB disk>
hdiutil mount <path to the Windows 10 ISO file>
cp -rp /Volumes/<ISO mounting point> /Volumes/WIN10
hdiutil unmount /Volumes/<ISO mounting point>
hdiutil unmount /Volumes/WIN10

About autonomous driving

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In these days I’m driving an Infiniti Q30, I find it very pretty and even if it has the wrong wheel drive, it can be fun too 🙂

One of the things I like best about this machine is electronic stuff. One of the driving aids I noticed is the autonomous reading of the road signs. I found the thing interesting also because I immediately looked at it from the standpoint of autonomous driving. Right about this context yesterday I noticed something that I did not like. Passing behind a tourist bus I noticed that the car read as a speed limit, as reported by the heavy vehicle that preceded me in a sticker that reported its maximum speed on the highway. In the picture you can see little because I was driving and I took it at a run. However, you can guess what happens: the car signals me as a speed limit of 80 km / h (instead of the 50 real ones) because the coach in front has a sticker that indicates its maximum speed on the highway in 80 km / h.

I noticed this behavior on several occasions between yesterday and today.

Today this is not a big problem, I guide and I know the limits and I know what directions to follow. But if she were driving, wouldn’t it be too easy to deceive her? And in the case of autonomous driving, any fines, who should pay them? Who was in the car? No, he wasn’t driving! The owner? No, he didn’t even drive! The manufacturer of the vehicle? Who hadn’t passed a patch in time?

I leave you with these doubts and with the invitation to use the right pedal until we can do it 🙂

Wait for an event in a WaterfallDialog

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Working on a Skill, I needed to block the execution of a WaterfallDialog while waiting for a specific event to arrive.
The solution is simple and based on the use of EventPrompt. Below I show how to use it.

Register EventPrompt in the constructor

AddDialog(new WaterfallDialog(nameof(WaterfallDialog), new WaterfallStep[]
{
	HelloAsync,
	WaitForEventAsync,
	DoneAsync
}));

AddDialog(new EventPrompt(nameof(EventPrompt), "SampleEvent", Validate));

InitialDialogId = nameof(WaterfallDialog);

Implement the three dialog steps

private async Task<DialogTurnResult> HelloAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
{
	await stepContext.Context.SendActivityAsync(MessageFactory.Text("Hello :)"), cancellationToken);

	return await stepContext.NextAsync(cancellationToken);
}

private async Task<DialogTurnResult> WaitForEventAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
{
	return await stepContext.PromptAsync(nameof(EventPrompt), new PromptOptions { Prompt = MessageFactory.Text("Waiting for the event") });
}

private async Task<DialogTurnResult> DoneAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
{
	await stepContext.Context.SendActivityAsync(MessageFactory.Text("After I receive the event."), cancellationToken);

	return await stepContext.NextAsync(cancellationToken);
}

Implement the event validator

async Task<bool> Validate(PromptValidatorContext<Activity> promptContext, CancellationToken cancellationToken)
{
	var activity = promptContext.Recognized.Value;
	if (activity.Type == ActivityTypes.Event)
	{
		try
		{
			string eventValue = (string)activity.Value;
			
			if(eventValue == "OK")
			{
				return true;
			}
		}
		catch { }
	}

	return false;
}

macOS disable WIFI on logout

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I recently started using an Apple notebook as a development laptop. I realized that when I block the screen the WIFI connection goes down. This is a wanted behavior and can be changed using this command:

cd /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources
sudo ./airport en1 prefs DisconnectOnLogout=NO

Obviously you need to replace “en1” with the identifier of your WIFI interface.

Share data from Virtual Assistant to Skill

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For some weeks I have been working on a project based on Bot Framework. Things were going well until I found myself in the position of having to share information between a Virtual Assistant and a Skill … Given that it gave me problems and that my requests made on Stackoverflow did not produce answers, I share the solution here.

This post expects the user to be clear what Virtual Assistant and Skill are and has already installed the prerequisites as described here:
https://microsoft.github.io/botframework-solutions/tutorials/csharp/create-assistant/1_intro/

Create a Virtual Assistant using the Virtual Assistant Template and name it SampleVirtualAssistant

Add to the solution SampleVirtualAssistant a new project (the Skill) using the Skill Template and name it SampleSkill

Rebuild the solution.

In the following example I’ll show the commands as execute on my system, where my sources path is C:\Users\emili\source\lab, be aware to replace it with your correct path!

Open PowerShell Core to execute the following commands.

Deploy to Azure the required resources.

cd c:\users\emili\source\lab\SampleVirtualAssistant\SampleVirtualAssistant\SampleVirtualAssistant
.\Deployment\Scripts\deploy.ps1
cd C:\Users\emili\source\lab\SampleVirtualAssistant\SampleSkill\SampleSkill
.\Deployment\Scripts\deploy.ps1

Now we go to work on the code.

In the project SampleSkill, edit the file manifestTemplate.json to add the required slot.

cd C:\users\emili\source\lab\SampleVirtualAssistant\SampleVirtualAssistant\SampleVirtualAssistant
botskills connect --botName SampleVirtualAssistant --remoteManifest "http://<your resource>.azurewebsites.net/api/skill/manifest" --luisFolder C:\Users\emili\source\lab\SampleVirtualAssistant\SampleSkill\SampleSkill\Deployment\Resources\LU\en\ --cs

In the project SampleVirtualAssistant edit the file skills.json to add the required slot.

In the project SampleVirtualAssistant edit the file MainDialog.cs to update the class Events

In the same file, in the method OnEventAsync add the code that handle the event to set the UserEmail

In the project SampleSkill, in the file MainDialog.cs in the RouteAsync method insert this code after the call to PopulateSateFromSemanticAcion

Rebuild all.

Publish the skill and the VA.

Start the chat and test it 🙂