sendPos.lua

modem = peripheral.find("modem")
ID = os.getComputerID()
print("ID = "..ID)

rednet.open("back")

function getPos()
   while true do
    x, y, z = gps.locate(10)
    loc = {x,y,z}
        term.setCursorPos(1, 3)
        rednet.send(sender, loc, sendLoc)
        for i, v in ipairs(loc) do
            print(v)
        end
    end
end

while true do
    event, sender, message, protocol = os.pullEvent("rednet_message")
    if message == "con1" then
        print("connected")
        getPos()
    end
end