ESP8266 Community Forum

Posted: **Thu Dec 01, 2016 4:25 pm**

Hi,

I compared speed of a 160 MHz ESP8266 with 3 different programming language:
LUA , Micropython, and Arduino IDE.

Result: C++ is 20 times faster than LUA. (6KHz, 12KHz, and 124 KHz )

See results here: http://esp8266freq.blogspot.hu/p/blog-page.html

Posted: **Thu Jan 26, 2017 9:10 am**

@raz123

is it possible to write a ir sender by lua?
i wrote one,but i think that the lua cannot fast enough to send a 38khz light.
may be the code is too dirty.

Code: Select all

   local function mark(mtime)
      local begin=tmr.now()
      while(tmr.now()-begin<mtime)
         do
            write(irpin,1)
            waitus(halfPeriodicTime)
            write(irpin,0)
            waitus(halfPeriodicTime)
         end
   end

Posted: **Thu Jan 26, 2017 4:39 pm**

I guess that there are too many inaccuracies when doing this from Lua.
Check gpio.serout() instead: http://nodemcu.readthedocs.io/en/master ... gpioserout

Posted: **Thu Jan 26, 2017 5:11 pm**

devsaurus wrote:I guess that there are too many inaccuracies when doing this from Lua.

We've had and example in our repo at https://github.com/nodemcu/nodemcu-firm ... irsend.lua for quite some time but I have no idea whether that still works.

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