[Help]Sending a location.

Hi guys, so I've just set up a GPS host, and I've tested it and it works great. Now, for the past 2 hours, I have been trying to make a program that sends the computer it's on location over rednet to my computer. Now, since gps.locate() returns a x,y, and z value, I then used tostring() to set them as strings. But to my dismay, when I tried it, it returned nil for all three values when i sent it over rednet with rednet.send. Now after spending 2 hours searching the web and trying everything i can, its now 11:00 and my eyes hurt. Please help me.

Thanks,
-Sodapop98

Let's see the code.

you could store the information comeing over rednet like this :)/>

--defining local table <coords>
local coords = {x, y, z}
--gps location is being stored in the table <coords>
rednet.recieve(coords)
--getting the variable <coordinate> by itself
coords[x] = <call on the variable> integer
coords[y] = <call on the variable> integer
coords[z] = <call on the variable> integer
--providing the computer/turtle with its location
local location = {
coords[x] = horizontalposition
coords[y] = verticleposition
coords[z] = heightposition
}

now this is just an example but you can use it any other way :)/> your welcome
hit the up button on the lower right for me will' ya
THANKS :)/>

That is not how tables work, nor how rednet.receive() works.

I can't really get the code exactly, because I'm on my iPhone, but this is one of the ways I tried:

local x, y, z = gps.locate(3)
local locX = tostring(x)
local locY = tostring(y)
local locZ = tostring(y)
local location = locX, locY, locZ
rednet.open("top")
rednet.send(39, location)

Like I said, this is only one of the things I tried.

Your location variable should be a table and you use serialize to send it over rednet and unserialize to receive it :)/> itns the textutils API on the wiki :P/>

That's almost right. Just change this line to:

local location = locX..' '..locY..' '..locZ

You can also remove the tostring()s above it, since using .. automatically converts numbers to strings.

On the receiving computer, you can use string.match to get your positions.

local id, msg = rednet.receive()
local locX, locY, locZ = msg:match('(%d+) (%d+) (%d+)')

Just tried above code, i am getting a error saying
"Attempted to concatenate string and nil"

If you did remove the tostring()s above it, you should then change it to use x, y, and z. You should also check to make sure that you're getting good results back from gps.locate.

Just tried both of them. GPS works and even with x, y, and z it gives me the same error

Well, let's see the current code.

Before sending your rednet message, put a debug print like: print(type(x),":",x,",",type(y),":",y,",",type(z),":",z)

That way you know for sure what's in x,y, and z.

Ok, I finally got it to work. Thanks guys.