Can't access components

[TheWildDefender 0]

I was trying to make a computer program to control a BigReactor turbine (I'll use a microcontroller after I figure this out). I know that the computer port acts as a component, so first of all, to increase the convenience of access of the computer port, I wrote

local turbine = component.proxy(component.get("5e7"))

That was the very first line of the program; 5e7 is the shortened address of the computer port. There is a bunch more code at the bottom that does the actual regulating, but when I run the program, it spits out this error message:

/home/turbine_control:1: attempt to index global 'component' (a nil value):
stack traceback:
	/home/turbine_control:1: in main chunk:
    (...tail calls...)
    [C]: in function 'xpcall'
    machine:751: in function 'xpcall'
    /lib/process.lua:94: in function </lib/process.lua:90>

Greatly confused, I read the message. I interpreted it as in line one of my program, turbine_control, I am accessing the undefined variable 'component'. I don't know what this completely means, and I even checked the process.lua function and coming out with no idea what was going on. I can call the function in the interactive lua prompt with no problem, but in a program, it doesn't let me.

What's going on, and how can I fix this?

[Michiyo 28]

For a computer you have to do

local component = require("component")

In the lua interpreter you don't have to require stuff like you do in scripts

For a microcontroller... well you don't get require there so you'll have to do it lower level and I'm not sure how that works

[TheWildDefender 0]

Thank

you

so

much.

It worked. Also, thanks for the quick answer.

[Gorzoid 10]

On 2/19/2017 at 9:02 PM, Michiyo said:

For a computer you have to do

local component = require("component")

In the lua interpreter you don't have to require stuff like you do in scripts

For a microcontroller... well you don't get require there so you'll have to do it lower level and I'm not sure how that works

In eeprom code the component table is never removed from global table so it's fine to use, and his original code should work on a microcontroller since he doesn't use any of the component api additions added by openos.