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- Subject: Re: Please help debug - usage of luars232
- From: Steve Litt <slitt@...>
- Date: Fri, 13 Sep 2013 18:51:18 -0400
On Sat, 14 Sep 2013 02:57:11 +0530
Jayanth Acharya <jayachar88@gmail.com> wrote:
> Presently I am using the library/module "luars232" installed via
> luarocks. I am using this on a Debian Linux machine, on the
> USB-serial port "/dev/ttyUSB0".
>
> I can access this port perfectly well using tools like picocom or
> minicom, i.e. have proper bi-directional communication.
>
> However, when I try this snippet:
>
> [code]
> rs232 = require("luars232")
assert(rs232, "ERROR: nil rs232")
>
> port_name = "/dev/ttyUSB0"
assert(port_name, "ERROR: nil port_name") --probably needless, but...
>
> local e, p = rs232.open(port_name)
assert(e, "ERROR: nil e")
assert(p, "ERROR: nil p")
> print(e, p)
> [/code]
By doing this, you get a feel for exactly when things start going
south, and you can zero in on the problem.
SteveT
Steve Litt * http://www.troubleshooters.com/
Troubleshooting Training * Human Performance