rednet.open("right") Invalid side?

Going into the lua interpreter and typing, rednet.open("right") works just fine as intended.
However, in my startup I have
write("What side is the modem on? ")
Side = read()
if (Side == "right") then
rednet.open("right")
end

Whenever I tell it the side is right and it tries to open it, it claims to be an invalid side…
When I tried doing
rednet.open(Side)
It claimed it wasn't a string.

Help please?

Try not doing capital letters.

tolower(Side) or Side = tolower(read()).

Those two will catch that problem for most things. Also, you can just do

side = tolower(read())
if side == "right" or "left" or "top" or "bottom" or "front" or "back" then
   if peripheral.getType(side) == "modem"  -- obviously only if you are using a modem and not cables.
      rednet.open(side)
   else
      print("Not a modem, please type a different side")
   end
else
   print("Side: "" .. side .. " " : Side not valid, please try again")
end

This will open whatever side you want, provided it is a modem, and the program detects said modem.


And, for the "not a string" segment, I would need to see the actual code, but EmTeaKay is probably right. use lower case letters for variables. Typing hte same thign over and over can be a littel bti of a hasels and cause unwanted mistakes.

OmegaVest, on 09 May 2012 - 08:19 PM said:

side = tolower(read())
if side == "right" or "left" or "top" or "bottom" or "front" or "back" then
   if peripheral.getType(side) == "modem"  -- obviously only if you are using a modem and not cables.
	  rednet.open(side)
   else
	  print("Not a modem, please type a different side")
   end
else
   print("Side: "" .. side .. " " : Side not valid, please try again")
end

this:

if side == "right" or "left" or "top" or "bottom" or "front" or "back" then

should be:

if side == "right" or side == "left" or side == "top" or side == "bottom" or side == "front" or side == "back" then

Otherwise you are comparing if the variable side equals to the string "right" or the strings "left", "top", "bottom", "front" and "back" are not nil (wich will always return true), so you could input whatever you want and it would always say it's ok. Just saying cause I've seen this error a lot.

@TameCaveMan: is that the exact code you are using, cause it should work like that.

It's best just to tolower() the read() and just pipe it straight into the command - let the users make their own mistakes. Or you just detect what side the modem is on like so:

local side
for k, v in pairs(rs.getSides()) do
  if peripheral.getType(v) == "modem" then
    side = v
    break
  end
end

if not side then
  error("No modem detected")
else
  rednet.open(side)
end

Try:
write("What side is the modem on? ")
side = read()
if side == "right" then
rednet.open("side")
end

Thank you for the response, it was indeed a simple typo that I didn't see.. I was tired and completely missed it! XD