client/lualibs/hf_reader.lua

   1 --[[
   2 THIS IS WORK IN PROGREESS, very much not finished.
   3
   4 This library utilises other libraries under the hood, but can be used as a generic reader for 13.56MHz tags.
   5 ]]
   6
   7 local reader14443A = require('read14a')
   8 local reader14443B = require('read14b')
   9 local reader15693 = require('read15')
  10
  11 ---
  12 -- This method library can be set waits or a 13.56 MHz tag, and when one is found, returns info about
  13 -- what tag it is.
  14 --
  15 -- @return if successful: an table containing card info
  16 -- @return if unsuccessful : nil, error
  17 local function waitForTag()
  18     print("Waiting for card... press <Enter> to quit")
  19     local readers = {reader14443A, reader14443B, reader15693}
  20     local i = 0;
  21     while not core.kbd_enter_pressed() do
  22         i = (i % 3) +1
  23         r = readers[i]
  24         print("Reading with ",i)
  25         res, err = r.read()
  26         if res then return res end
  27         print(err)
  28             -- err means that there was no response from card
  29     end
  30     return nil, "Aborted by user"
  31 end
  32
  33 return {
  34     waitForTag = waitForTag,
  35 }