Il 31/12/2020 03:02, A. Dumas ha scritto:
> Andy Burns  wrote:
>> On a hardware level you'll need a level shifter to convert the PI's
>> RX/TX pins from 3.3V TTL to +/- 12V e.g.
>
> No. He said uart, never mentioned rs232.
>

Rs232 electric level in not necessary
Conversion ttl-rs232 is not necessary
Gpio port of Rasperry is connected directly with other 3v3 electronic boards
The part for me obscure, is how to use Raspberry uart port for
communication via tcp ethernet line
The second big question is how to use for a 'virtual com port' on
Windows side, that mus communicate with Raspberry board
Please see the following link

https://www.b4x.com/android/forum/threads/raspberry-how-to-realize-a-serial-ser
ver-uart-ethernet.125040/

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