Use Apple Airtag instead of Rfid tag

[Novodk]

You need to create a resident script that executes ow.list() every second or so. Then you can perform required action when a device with a given ID is present or not.

A bit out of my comfort zone
Do you have any example code, in that direction to get me started?

Hello Novodk.

This is resident script for you.

Code:

require('ow')

function findDifferences(list, prev_list)
  local new_ids = {}
  local removed_ids = {}

  -- Check for new IDs
  if list then
    for id, _ in pairs(list) do
      if not prev_list or not prev_list[id] then
        table.insert(new_ids, id)
      end
    end
  end

  -- Check for removed IDs
  if prev_list then
    for id, _ in pairs(prev_list) do
      if not list[id] then
        table.insert(removed_ids, id)
      end
    end
  end

  return new_ids, removed_ids
end

list = ow.list()

local new_ids, removed_ids = findDifferences(list, prev_list)

if #new_ids > 0 then
  log("New IDs:")
  for _, id in ipairs(new_ids) do
    log(id, list[id])
  end
end

if #removed_ids > 0 then
  log("Removed IDs:")
  for _, id in ipairs(removed_ids) do
    log(id, prev_list[id])
  end
end

prev_list = list

Thank you RomansP
Is it correct that the script adds the rfid tag ID to a table and after a short time it removes it again?


If that is the case, how do I use the information from that table?