Not Working Drone Script

drone.lua:

targetx=0
targety=0
targetz=0

local navi=component.proxy(component.list('navigation')())
local xyz={navi.getPosition()}
local x=math.floor(xyz[1])
local y=math.floor(xyz[2])
local z=math.floor(xyz[3])
local modem=component.proxy(component.list('modem')())
modem.open(1337)

local function respond(...)
  local args=table.pack(...)
  pcall(function() modem.broadcast(1337, table.unpack(args)) end)
end

local function receive()
  while true do
    local e, _, _, _, _, cmd=computer.pullSignal()
    if e == "modem_message" then return load(cmd) end
  end
end

function getDroneXYZ()
  pcall(function() modem.broadcast(1337, navi.getPosition()) end)
end

function getDroneX()
  pcall(function() modem.broadcast(1337, x) end)
end

function geDronetY()
  pcall(function() modem.broadcast(1337, y) end)
end

function getDroneZ()
  pcall(function() modem.broadcast(1337, z) end)
end

while true do
  if targetx ~= 0 or targety ~= 0 or targetz ~= 0 then
    nx = targetx - x
    ny = targety - y
    nz = targetz - z
    coords = nx .. ", " .. ny .. ", " .. nz
    pcall(function() modem.broadcast(1337, "coords=" .. coords) end)
    --drone.setStatusText(coords)
    drone.move(nx, ny, nz)
    targetx = 0
    targety = 0
    targetz = 0
  end
  local result, reason = pcall(function()
    local result, reason = receive()
    if not result then return respond(reason) end
    respond(result())
  end)
  if not result then respond(reason) end
end



tablet.lua:

local component = require('component')
local modem = component.modem
local event = require("event")
local term = require("term")

coords=""

modem.broadcast(1337, "drone=component.proxy(component.list('drone')())")

function printblockinfo(eventname, data)
  modem.broadcast(1337, "targetx=" .. data['posX'])
  modem.broadcast(1337, "targety=" .. data['posY'])
  modem.broadcast(1337, "targetz=" .. data['posZ'])
  term.clear()
  print("X: " .. data['posX'])
  print("Y: " .. data['posY'])
  print("Z: " .. data['posZ'])
end

--print("listening for tablet_use events")
event.listen("tablet_use", printblockinfo)

function transmit()
  term.clear()
  print("-----Transmit-----")
  while true do
    msg=io.read()
    if msg == "leave" then
      break
    else
      pcall(function() modem.broadcast(1337, msg) end)
      print(select(6, event.pull(6, "modem_message")))
    end
  end
  event.pull("interrupted")
  event.ignore("tablet_use", printblockinfo)
end

function main()
  print("send")
  print("leave")
  while true do
    if coords ~= "" then
      modem.broadcast(1337, "drone.move(" .. coords .. ")")
    end
    input=io.read()
    if input == "send" then
      transmit()
    elseif input == "leave" then
--      event.pull("interrupted")
--      event.ignore("tablet_use", printblockinfo)
--      print("done")
      break
    end
  end
end

main()

event.pull("interrupted")
event.ignore("tablet_use", printblockinfo)
print("done")