ESP8266 Community Forum

- Sat Mar 14, 2015 11:13 am #11964 Hi all, an esp8266 newbie here.

I got this esp8266 module http://www.electrodragon.com/product/es ... fi-module/ , connected it to a MAC OSX machine using a FTDI adapter (3.3V I/O, 9600, external beefy 3.3V LDO) and flushed it with the latest Lua image.

Now I am trying to use it via Cool Term in line mode.

Some commands do work:

Code: Select all> print(1+1)
2
>

Some commands kind of work:

Code: Select all> print (1/0)
c_ÇÏRSöfJSúfJSúâîá           // This must be the ~75kbps startup message

NodeMCU 0.9.5 build 20150212  powered by Lua 5.1.4      // a divide by zero caused a module reset.
>

And others do not work at all:

Code: Select all> node.info()
>     // expecting here version info, etc.


Code: Select all> file.open("test.lua", "w")
> file.write("test text")
> file.close()
> file.list()
>      //  expecting at least one file to be listed here

Am I missing something?

- Sat Mar 14, 2015 11:29 am #11965 Please see the LUA documention. For example, "node.info()" is not supposed to "do" anything. It's a function call that returns several values. It doesn't by itself print to the output.

https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_en

- Sat Mar 14, 2015 11:57 am #11967 That explains it, thanks ByMK1888. I will add appropriate prints.

BTW, is it a normal for the node to restart on a div by zero? Can I override the exception handler?