詳説 .NET 5 のIoTサポート

詳説？ .NET 5 のIoTサポート 2020/12/19 Takashi Matsuoka

Takashi Matsuoka (@matsujirushi12) 2017～ MVP for Windows Development 2020～ for Microsoft Azure 「e」3つ

.NET 5 とは、どんなモノなのでしょうか。 IoT で使えるのでしょうか。 #ALGYAN

https://docs.microsoft.com/ja-jp/archive/msdn-magazine/2019/july/csharp-net-reunified-microsoft%E2%80%99s-plans-for-net-5

• https://docs.microsoft.com/ja-jp/archive/msdn-magazine/2019/july/csharp-net-reunified-microsoft’s-plans-for-net-5

.NET 5 Windows, Linux, macOS MCU MT3620 MPU (Azure Sphere) Cortex-M Cortex-A7 + M4 Cortex-A, Celeron Flash内蔵 (e.g. 2MB) Flash内蔵 (16MB) Flash外付 (e.g. 64GB eMMC) RAM内蔵 (e.g. 256KB) RAM内蔵 (4MB) RAM外付 (e.g. 8GB) ベアメタル, RTOS 小さいLinux Windows, Linux US$1～10 US$10 US$30～

Network Connectivity System.Net OS Windows, Linux, macOS .NET 5 Architectures x86, x64, Arm32, Arm64 .NET 5 - Supported OS versions Hardware Interfaces <UART> System.IO.Ports ( .NET Platform Extensions 5.0 ) <GPIO, PWM, I2C, SPI> System.Device.Gpio Iot.Device ( .NET Core IoT Libraries )

• https://docs.microsoft.com/ja-jp/dotnet/api/system.net?view=net-5.0
• https://docs.microsoft.com/ja-jp/dotnet/api/system.io.ports?view=dotnet-plat-ext-5.0
• https://github.com/dotnet/iot
• https://github.com/dotnet/core/blob/master/release-notes/5.0/5.0-supported-os.md

.NET Core IoT Libraries https://github.com/dotnet/iot/blob/master/Documentation/roadmap.md

• https://github.com/dotnet/iot/blob/master/Documentation/roadmap.md

.NET 5 VSCode ODYSSEY - X86 (+Ubuntu 18.04) LED

• https://www.seeedstudio.com/ODYSSEY-X86J4105864-p-4447.html

Remote Development using SSH

• https://code.visualstudio.com/docs/remote/ssh

Feature request: support Linux ARM / ARM64

• https://github.com/OmniSharp/omnisharp-vscode/issues/2771

DigitalWrite
Shell

$ git clone https://github.com/dotnet/iot
$ dotnet new console -o DigitalWrite
$ cd DigitalWrite
$ dotnet add package System.Device.Gpio
or
$ dotnet add reference ../iot/src/System.Device.Gpio/System.Device.Gpio.csproj

Program.cs

using System;
using System.Device.Gpio;
using System.Threading;

const int pin = 337;

C# 9 :
Top-level statements

// Pin7

using var controller = new GpioController();
controller.OpenPin(pin, PinMode.Output);
bool ledOn = true;
while (true)
{
ledOn = !ledOn;
controller.Write(pin, ledOn ? PinValue.High : PinValue.Low);
Thread.Sleep(100);
}

• https://docs.microsoft.com/en-us/dotnet/csharp/tutorials/exploration/top-level-statements

DEMO

DigitalWrite - Thread.Sleep(100)

DigitalWrite - Thread.Sleep(100)

DigitalWrite – Python(sysfs)

"dotnet" is not a file ターミナル プロセスが起動に失敗しました: Path to shell executable "dotnet" is not a file of a symlink。 tasks.json ... { "label": "build", "command": “/usr/bin/dotnet", "type": "process", "args": [ "build", "${workspaceFolder}/DigitalWrite.csproj", "/property:GenerateFullPaths=true", "/consoleloggerparameters:NoSummary" ], "problemMatcher": "$msCompile" }, ...

UnauthorizedAccessException

UnauthorizedAccessException $ wget https://aka.ms/getvsdbgsh -O - 2>/dev/null | /bin/sh /dev/stdin -v latest -l ~/vsdbg $ chmod 700 ~/.ssh $ chmod 600 ~/.ssh/id_rsa $ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys $ sudo vi /etc/sudoers ubuntu ALL=NOPASSWD: ALL ← 最下行に追加

UnauthorizedAccessException
launch.json
...
{
"name": ".NET Core Remote Launch (console)",
"type": "coreclr",
"request": "launch",
"preLaunchTask": "build",
"program": "${workspaceFolder}/bin/Debug/net5.0/DigitalWrite.dll",
"args": [],
"cwd": "${workspaceFolder}",
"console": "internalConsole",
"stopAtEntry": false,
"pipeTransport": {
"pipeCwd": "${workspaceRoot}",
"pipeProgram": "ssh",
"pipeArgs": [
"-T",
"-i", "~/.ssh/id_rsa",
"ubuntu@localhost"
],
"debuggerPath": "sudo ~/vsdbg/vsdbg",
"quoteArgs": false
}
},
...

ODYSSEY - X86 (+Ubuntu 18.04) Azure IoT Hub

SendTelemetry
Shell

Program.cs

$ git clone https://github.com/dotnet/iot

using
using
using
using
using

$ dotnet new console -o SendTelemetry
$ cd SendTelemetry
$ dotnet add package Microsoft.Azure.Devices.Client

System;
System.Text;
System.Text.Json;
System.Threading.Tasks;
Microsoft.Azure.Devices.Client;

CONNECT

const string CONNECTION_STRING = "HostName=matsujirushi-iothub.azuredevices.net;DeviceId=sim;SharedAccessKey=...";
Console.WriteLine("Create DeviceClient");
var client = DeviceClient.CreateFromConnectionString(CONNECTION_STRING, TransportType.Mqtt);

var rand = new Random();
while (true)
{
double currentTemperature = 20 + rand.NextDouble() * 15;
double currentHumidity = 60 + rand.NextDouble() * 20;
Console.WriteLine("Create telemetry message");
var messageBody = JsonSerializer.Serialize(new { temperature = currentTemperature, humidity = curre
ntHumidity, });
using var message = new Message(Encoding.ASCII.GetBytes(messageBody))
{
ContentType = "application/json",
ContentEncoding = "utf-8",
};

CREATE
MESSSGE

Console.WriteLine($"Send telemetry message {DateTime.Now}");
await client.SendEventAsync(message);
await Task.Delay(1000);
}

SEND

DEMO

.NET 5 とは、どんなモノなのでしょうか。 IoT で使えるのでしょうか。 • OS / Architectures • Network Connectivity • Hardware Interfaces • Development Environment

少しだけDive!

“As a way to try out the new release ourselves, a few of us decided to update the dotnet/iot repo to use new C# 9 syntax and target .NET 5.0. The changes resulted in removing >2k lines of code, just by adopting new syntax. It uses top-level programs, records, patterns, and switch expressions.” https://devblogs.microsoft.com/dotnet/announcing-net-5-0/

• https://devblogs.microsoft.com/dotnet/announcing-net-5-0/

GPIO - .NET Core IoT Libraries GpioController (.cs) partial GpioController (.Linux.cs) GpioController (.Windows.cs) Create instance GpioDriver UnixDriver RaspberryPi3Driver (.cs) RaspberryPi3Driver (.Linux.cs) RaspberryPi3Driver (.Windows.cs) LibGpiodDriver (.Linux.cs) SysFsDriver (.Linux.cs) Windows10Driver (.Windows.cs)

GPIO - .NET Core IoT Libraries https://github.com/dotnet/iot/tree/master/src/System.Device.Gpio

• https://github.com/dotnet/iot/tree/master/src/System.Device.Gpio

GPIO - .NET Core IoT Libraries

GPIO - .NET Core IoT Libraries

GPIO - .NET Core IoT Libraries

GPIO - .NET Core IoT Libraries GpioController (.cs) partial GpioController (.Linux.cs) GpioController (.Windows.cs) Create instance GpioDriver UnixDriver (.cs) RaspberryPi3Driver (.cs) RaspberryPi3Driver (.Linux.cs) RaspberryPi3Driver (.Windows.cs) RaspberryPi3 LinuxDriver (.cs) RaspberryPiCM3 Driver (.cs) Windowsのときの 振る舞いは 割愛♪ LibGpiodDriver (.cs) SysFsDriver (.cs)

sysfs is dead! long live libgpiod!

sysfs is dead! long live libgpiod! LibGpiodDriver.cs

• https://blog.adafruit.com/2018/11/26/sysfs-is-dead-long-live-libgpiod-libgpiod-for-linux-circuitpython/

[DllImport("libgpiod")] # export LD_DEBUG=files # ./DigitalWrite 2780: 2780: 2780: file=/usr/share/dotnet/shared/Microsoft.NETCore.App/5.0.0/libgpiod.so [0]; dynamically loaded by /usr/sh file=/home/ubuntu/dotnet/DigitalWrite/bin/Debug/net5.0/libgpiod.so [0]; dynamically loaded by /usr/share file=libgpiod.so [0]; dynamically loaded by /usr/share/dotnet/shared/Microsoft.NETCore.App/5.0.0/libcore 2780: 2780: 2780: file=/usr/share/dotnet/shared/Microsoft.NETCore.App/5.0.0/liblibgpiod.so [0]; dynamically loaded by /usr file=/home/ubuntu/dotnet/DigitalWrite/bin/Debug/net5.0/liblibgpiod.so [0]; dynamically loaded by /usr/sh file=liblibgpiod.so [0]; dynamically loaded by /usr/share/dotnet/shared/Microsoft.NETCore.App/5.0.0/libc 2780: 2780: 2780: file=/usr/share/dotnet/shared/Microsoft.NETCore.App/5.0.0/libgpiod [0]; dynamically loaded by /usr/share file=/home/ubuntu/dotnet/DigitalWrite/bin/Debug/net5.0/libgpiod [0]; dynamically loaded by /usr/share/do file=libgpiod [0]; dynamically loaded by /usr/share/dotnet/shared/Microsoft.NETCore.App/5.0.0/libcoreclr 2780: 2780: 2780: file=/usr/share/dotnet/shared/Microsoft.NETCore.App/5.0.0/liblibgpiod [0]; dynamically loaded by /usr/sh file=/home/ubuntu/dotnet/DigitalWrite/bin/Debug/net5.0/liblibgpiod [0]; dynamically loaded by /usr/share file=liblibgpiod [0]; dynamically loaded by /usr/share/dotnet/shared/Microsoft.NETCore.App/5.0.0/libcore