satellite

local modem = peripheral.wrap("back")
modem.open(10) -- information from tree farm
modem.open(101) -- commands from another computer which I use to control the tree farm via the network

while true do
  sleep(0)
  Event, ModemSide, ModemPort, ModemReplyPort, ModemMessage, ModemDistance = os.pullEvent("modem_message")

  -- transforms the ports to send information from the tree farm to the main computer
  if ModemPort == 10 then
    ModemPort = 100
    ModemReplyPort = 1
  end

  -- transforms the ports to send information from the main computer to the tree farm
  if ModemPort == 101 then
    ModemPort = 1
    ModemReplyPort = 10
  end
  modem.transmit(ModemPort, ModemReplyPort, ModemMessage)

  print(ModemMessage)

  Event, ModemSide, ModemPort, ModemReplyPort, ModemMessage, ModemDistance = 0
end