Communication with USB

[kalimero-plt]

Hello, I need to send and receive data via USB. I'm trying to use the bulkTransferIn part, but how do I send the data? Where should I write the data I will send?

[Sunbreak]

bulkTransferOut

[kalimero-plt]

flutter: bulkTransferOut error: LIBUSB_ERROR_NOT_FOUND. bulkTransferOut returns -1

[Sunbreak]

Could you post flutter doctor -v?

[kalimero-plt]

[√] Flutter (Channel dev, 2.11.0-0.1.pre, on Microsoft Windows [Version 10.0.19044.1586], locale tr-TR) • Flutter version 2.11.0-0.1.pre at C:\Users\Enelsis\src\flutter • Upstream repository https://github.com/flutter/flutter.git • Framework revision b101bfe32f (5 weeks ago), 2022-02-16 07:36:54 -0800 • Engine revision e355993572 • Dart version 2.17.0 (build 2.17.0-69.2.beta) • DevTools version 2.10.0-dev.1

[√] Android toolchain - develop for Android devices (Android SDK version 32.1.0-rc1) • Android SDK at C:\sdk • Platform android-32, build-tools 32.1.0-rc1 • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java • Java version OpenJDK Runtime Environment (build 11.0.11+9-b60-7590822) • All Android licenses accepted.

[√] Chrome - develop for the web • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[√] Visual Studio - develop for Windows (Visual Studio Community 2019 16.11.9) • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community • Visual Studio Community 2019 version 16.11.32106.194 • Windows 10 SDK version 10.0.19041.0

[√] Android Studio (version 2021.1) • Android Studio at C:\Program Files\Android\Android Studio • Flutter plugin can be installed from: https://plugins.jetbrains.com/plugin/9212-flutter • Dart plugin can be installed from: https://plugins.jetbrains.com/plugin/6351-dart • Java version OpenJDK Runtime Environment (build 11.0.11+9-b60-7590822)

[√] VS Code (version 1.65.2) • VS Code at C:\Users\Enelsis\AppData\Local\Programs\Microsoft VS Code • Flutter extension version 3.36.0

[√] Connected device (3 available) • Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.19044.1586] • Chrome (web) • chrome • web-javascript • Google Chrome 99.0.4844.74 • Edge (web) • edge • web-javascript • Microsoft Edge 99.0.1150.46

[√] HTTP Host Availability • All required HTTP hosts are available

• No issues found!

[Sunbreak]

If you are working on Windows device, check the following steps

1. QuickUsb.init to initialize
2. QuickUsb.getDeviceList to get list of devices
3. QuickUsb.openDevice to open the right device
4. QuickUsb.getConfiguration to get the right config
5. QuickUsb.claimInterface to claim the interface
6. e.direction == UsbEndpoint.DIRECTION_OUT to check endpoint direction
7. QuickUsb.bulkTransferOut to send data

[kalimero-plt]

It works without error. Thank you for your answers.

[kalimero-plt]

How can I set the stop bit?

[Sunbreak]

What is a stop bit? Any doc?

You'd better file another issue for new topic

[kalimero-plt]

A stop bit is a character in asynchronous communication that lets a receiver know that the byte being transmitted has ended.