how to send hex data with serial?

[YoonesImani]

Hi, how can I send serial data in HEX format?

Thanks

[vsergeev]

This is a bit vague. Do you want to send binary data? or binary data encoded into an ASCII hex string?

[YoonesImani]

actually, I want to send binary data.

On Sat, Oct 3, 2020 at 10:15 PM Vanya Sergeev notifications@github.com wrote:

This is a bit vague. Do you want to send binary data? or binary data encoded into an ASCII hex string?

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[vsergeev]

Lua strings can contain binary data, so you can write binary data with the write() method on the serial handle (https://github.com/vsergeev/lua-periphery/blob/master/docs/serial.md).

[YoonesImani]

The problem is for example when I want to send \r (carriage return) it sends two characters "\" and "r"

On Sat, Oct 10, 2020 at 11:37 PM Vanya Sergeev notifications@github.com wrote:

Closed #25 https://github.com/vsergeev/lua-periphery/issues/25.

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[vsergeev]

I think your problem is somewhere in the byte string construction.

The Lua string "\r" is one byte:

Lua 5.4.0  Copyright (C) 1994-2020 Lua.org, PUC-Rio
> s = "\r"
> #s
1
> s == "\x0d"
true
> string.byte(s, 1) == 0x0d
true
>