USB/BlueTooth classes?

[Jimmy Johnson]

Are there Eiffel classes for connecting & sending byte streams over BlueTooth or USB.  (I want to send bytes to a Lego Mindstorms NXT robot.)

jjj

[Liberty Lover]

Everyone,

See the following:

https://github.com/simple-eiffel/simple_bluetooth

https://github.com/simple-eiffel/simple_serial

You're welcome!

Best,

Larry

[Liberty Lover]

  see also:  claude_eiffel_op_docs/designs/simple_bluetooth_design.md at main · simple-eiffel/claude_eiffel_op_docs

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[Jimmy Johnson]

Does/will it work on Mac?

[Liberty Lover]

Hi Jimmy,

Currently simple_bluetooth is Windows-only. It relies on simple_serial which uses Win32 serial port APIs, and Windows Bluetooth pairing exposes SPP devices as COM ports.

Mac support is technically feasible but would require:
  1. Extending simple_serial to support POSIX termios (Mac/Linux serial)
  2. Adding IOBluetooth framework integration for Mac device discovery

This is on our radar but not yet scheduled. If there's interest from the community, it could move up the priority list.

Cheers,

Larry

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[Ulrich Windl]

Could it be you posted the same message multiple times?

26.12.2025 22:30:28 Liberty Lover <rix....@gmail.com>:

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> To view this discussion visit https://groups.google.com/d/msgid/eiffel-users/a10b4ef7-ac8e-4e90-84ef-d33b1d5f0429n%40googlegroups.com[https://groups.google.com/d/msgid/eiffel-users/a10b4ef7-ac8e-4e90-84ef-d33b1d5f0429n%40googlegroups.com?utm_medium=email&utm_source=footer].

[Ulrich Windl]

It seems to me we should have a Bluetooth class inheriting from either Bluetooth_Windows or Bluetooth_Mac. The challenge is to have the same interface for both platforms. And with experience the Bluetooth class wouldn't have to be changed when a new platform is added.

Ulrich

27.12.2025 12:26:26 Liberty Lover <rix....@gmail.com>:

> Hi Jimmy,
>
> Currently simple_bluetooth is Windows-only. It relies on simple_serial which uses Win32 serial port APIs, and Windows Bluetooth pairing exposes SPP devices as COM ports.
>
> Mac support is technically feasible but would require:
>   1. Extending simple_serial to support POSIX termios (Mac/Linux serial)
>   2. Adding IOBluetooth framework integration for Mac device discovery
>
> This is on our radar but not yet scheduled. If there's interest from the community, it could move up the priority list.
>
> Cheers,
>
> Larry
>
> On Fri, Dec 26, 2025 at 11:57 PM Jimmy Johnson <eiffe...@gmail.com> wrote:
>> Does/will it work on Mac?
>>
>>
>> On Friday, December 26, 2025 at 2:36:59 PM UTC-7 rix....@gmail.com wrote:

>>>   see also:  claude_eiffel_op_docs/designs/simple_bluetooth_design.md at main · simple-eiffel/claude_eiffel_op_docs[https://github.com/simple-eiffel/claude_eiffel_op_docs/blob/main/designs/simple_bluetooth_design.md]

>>>
>>>
>>> On Fri, Dec 26, 2025 at 4:30 PM Liberty Lover <rix....@gmail.com> wrote:
>>>> Everyone,
>>>>
>>>> See the following:
>>>>
>>>> https://github.com/simple-eiffel/simple_bluetooth
>>>>
>>>> https://github.com/simple-eiffel/simple_serial
>>>>
>>>> You're welcome!
>>>>
>>>> Best,
>>>>
>>>> Larry
>>>>
>>>> On Sunday, January 26, 2025 at 12:24:02 AM UTC-5 eiffe...@gmail.com wrote:
>>>>> Are there Eiffel classes for connecting & sending byte streams over BlueTooth or USB.  (I want to send bytes to a Lego Mindstorms NXT robot.)
>>>>> jjj
>>>>
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>>>> To view this discussion visit https://groups.google.com/d/msgid/eiffel-users/a10b4ef7-ac8e-4e90-84ef-d33b1d5f0429n%40googlegroups.com[https://groups.google.com/d/msgid/eiffel-users/a10b4ef7-ac8e-4e90-84ef-d33b1d5f0429n%40googlegroups.com?utm_medium=email&utm_source=footer].

>>
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>> To view this discussion visit https://groups.google.com/d/msgid/eiffel-users/5df31f84-7c2b-45ec-941a-d77d5f9af911n%40googlegroups.com[https://groups.google.com/d/msgid/eiffel-users/5df31f84-7c2b-45ec-941a-d77d5f9af911n%40googlegroups.com?utm_medium=email&utm_source=footer].

>
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> To view this discussion visit https://groups.google.com/d/msgid/eiffel-users/CA%2B3qnjebcNxwuwN7jwkMqptbiW-t0RmuHq3GmZukFquBHks6Kg%40mail.gmail.com[https://groups.google.com/d/msgid/eiffel-users/CA%2B3qnjebcNxwuwN7jwkMqptbiW-t0RmuHq3GmZukFquBHks6Kg%40mail.gmail.com?utm_medium=email&utm_source=footer].

[rfo amalasoft.com]

Taking a cue from EiffelVision, having an 'implementation' feature that refers to the Win/Mac/Linux implementations and an abstract common class has worked well for quite a while and should be a way also to insulate (thanks to abstraction) any implementation-specific changes.  Of course, this would require a good model, but I suspect this crowd could come up with such a thing.

R

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From: eiffel...@googlegroups.com <eiffel...@googlegroups.com> on behalf of Ulrich Windl <u202...@gmail.com>
Sent: Saturday, December 27, 2025 8:23 AM
To: eiffel...@googlegroups.com <eiffel...@googlegroups.com>
Subject: Re: [eiffel-users] Re: USB/BlueTooth classes?

 

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[Liberty Lover]

Yes, I did. I didn't know where it would get covered and who all would see it. Sorry if it was overly redundant. I just wanted to ensure it was shared to everyone who might care.

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[Jimmy Johnson]

Larry,

Ask Claud if he could do Eiffel-only bluetooth that does not rely on other libraries.

[Liberty Lover]

  Hi Jimmy,

  I asked Claude, and here's the reality:

  "Eiffel-only" Bluetooth isn't possible - Bluetooth is hardware, and you must go through OS APIs to access it. There's no avoiding C/system calls.

  However, simple_bluetooth already minimizes dependencies:
  - No external C libraries required
  - No third-party DLLs
  - Uses inline C externals to call Win32 APIs directly
  - All C code is embedded in Eiffel source files

  The dependency chain is:
  simple_bluetooth → simple_serial → Win32 COM port APIs (built into Windows)

  That's as lean as it gets. The only "library" it uses is the Windows operating system itself.

  For Mac/Linux, you'd similarly call IOBluetooth (Mac) or BlueZ (Linux) through inline C - still no third-party dependencies, just different OS APIs behind the same Eiffel interface.

  What Ulrich and Roger suggested (EiffelVision-style abstraction with platform implementations) is exactly how we'd structure cross-platform support.

  Cheers,
  Larry

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[Jimmy Johnson]

Yes, inline C is fine.  I want to connect on Mac.

[Liberty Lover]

To make that happen for Mac, I need to get my Mac mini finalized for Eiffel and the simple_* ecosystem. I started to do it, but got distracted. Perhaps the coming week.

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