Re: pre-usage question

[KHMan <keinhong@...>]

On 5/30/2015 3:43 AM, E Radler wrote:
> I was checking LUA, because chinese boards  based onesp8266
> chipsay they suport LUA .

It's Lua not LUA. You're probably looking at NodeMCU on ESP8266.
Have you studied the materials at [1]?

[1] http://www.esp8266.com/

> Compared to PC users living with a wealth of library import
> options and on-line examples for python I fear the experience on
> an embedded device will be less fancy for micropython but as well
> as with LUA . Especially for control algorithms  you will have to
> start  from scratch using LUA? Is there support for http:// GET ?

I think it can do plenty, but remember on-chip SRAM is limited if 
you are not using a separate MCU. "Control algorithms" is pretty 
vague, but hobbyists using NodeMCU for basic IoT-stuff sequencing 
are doing fine. If you need the faster kind of control algorithms, 
just download the SDK+compiler VM image and use gcc.

> The second point is UML round trip support, having code
> generation. Is there some 4 GL SE support for LUA?
> thanks

Lua is a scripting language that is often embedded in software 
apps, see [2]. Note it's not "embedded as in MCUs"... It has been 
adapted to run on MCUs with small memory footprints, *however* 
it's still a scripting language that juggles objects and do 
garbage collection. Large apps may use plenty of memory and 
garbage collection is not your usual deterministic memory usage 
scenario.

[2] https://sites.google.com/site/marbux/home/where-lua-is-used

So it's not a purpose-built embedded systems development tool with 
all the UML or 4GL or whatnot tools. I believe it just happened 
that there was a Lua for MCUs -- eLua -- that could be quickly 
ported to ESP8266, creating NodeMCU, which turned out great for 
speedy project development, perfect for the maker demographic, 
which is probably the main target customer for the boards.

--
Cheers,
Kein-Hong Man (esq.)
Kuala Lumpur, Malaysia