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227
client/luascripts/lf_t55xx_multiwriter.lua
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227
client/luascripts/lf_t55xx_multiwriter.lua
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local getopt = require('getopt')
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local utils = require('utils')
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local ac = require('ansicolors')
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local os = require('os')
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local dash = string.rep('--', 32)
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local dir = os.getenv('HOME') .. '/.proxmark3/logs/'
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local logfile = (io.popen('dir /a-d /o-d /tw /b/s "' .. dir .. '" 2>nul:'):read("*a"):match("%C+"))
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local command = core.console
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command('clear')
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author = ' Author: jareckib - 12.03.2025'
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version = ' version v1.03'
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desc = [[
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This simple script stores 1, 2 or 3 different EM4102 on a single T5577.
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There is an option to enter the number engraved on the fob in decimal form.
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The script can therefore be useful if the original EM4102 doesn't work but
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has an engraved ID number. By entering such an ID as a single EM4102, we
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can create a working copy of our damaged fob.
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A tag T5577 created in this way works with the following USB readers:
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- ACM08Y
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- ACM26C
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- Sycreader R60D
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- Elatech Multitech TWN4
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]]
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usage = [[
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script run lf_t55xx_multiwriter
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]]
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arguments = [[
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script run lf_t55xx_multiwriter -h : this help
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]]
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local function help()
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print()
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print(author)
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print(version)
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print(desc)
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print(ac.cyan .. ' Usage' .. ac.reset)
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print(usage)
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print(ac.cyan .. ' Arguments' .. ac.reset)
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print(arguments)
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end
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local function reset_log_file()
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local file = io.open(logfile, "w+")
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file:write("")
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file:close()
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end
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local function read_log_file(logfile)
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local file = io.open(logfile, "r")
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if not file then
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return nil
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end
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local content = file:read("*all")
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file:close()
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return content
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end
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local function extract_uid(log_content)
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for line in log_content:gmatch("[^\r\n]+") do
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local uid = line:match("%[%s*%+%]%s*EM%s*410x%s*ID%s*([A-F0-9]+)")
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if uid then
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return uid
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end
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end
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return nil
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end
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local function hex_to_bin(hex_value)
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if not hex_value:match("^[A-Fa-f0-9]+$") or #hex_value ~= 10 then
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error("Invalid UID format. Must be a valid 5-byte HEX value.")
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end
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local decimal_value = tonumber(hex_value, 16)
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if not decimal_value then
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error("Error: Invalid HEX conversion.")
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end
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local binary = ""
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for i = 39, 0, -1 do
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binary = binary .. ((decimal_value & (1 << i)) ~= 0 and "1" or "0")
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end
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if #binary ~= 40 then
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error("Unexpected UID length after conversion to binary.")
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end
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return binary
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end
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local function even_parity(bits)
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return (bits:gsub("0", ""):len() % 2 == 0) and "0" or "1"
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end
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local function encode_uid(uid)
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local uid_bin = hex_to_bin(uid)
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local start_bits = '1' .. string.rep('1', 8)
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local data_with_parity = ''
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for i = 1, 40, 4 do
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local nibble = uid_bin:sub(i, i + 3)
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local parity_bit = even_parity(nibble)
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data_with_parity = data_with_parity .. nibble .. parity_bit
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end
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local col_parity_bits = ''
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for i = 1, 4 do
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local col_bits = ''
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for j = i, #data_with_parity, 5 do
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col_bits = col_bits .. data_with_parity:sub(j, j)
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end
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col_parity_bits = col_parity_bits .. even_parity(col_bits)
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end
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local stop_bit = '0'
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local full_bin = start_bits .. data_with_parity .. col_parity_bits .. stop_bit
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return string.format("%X", tonumber(full_bin, 2))
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end
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local function get_uid_from_user()
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while true do
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print(dash)
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io.write(ac.cyan .. '(1)' .. ac.reset .. ' Manual entry UID |' .. ac.cyan .. ' (2)' .. ac.reset .. ' Read via Proxmark3 ')
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local choice
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repeat
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choice = io.read()
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if choice ~= "1" and choice ~= "2" then
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io.write(ac.yellow .. "Invalid choice. Please enter (1) or (2) " .. ac.reset)
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end
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until choice == "1" or choice == "2"
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if choice == "1" then
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local format
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repeat
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io.write("Choose format HEX or DEC (engraved ID) "..ac.cyan.."(h/d) "..ac.reset)
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format = io.read():lower()
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if format ~= "h" and format ~= "d" then
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print(ac.yellow .. "Invalid choice. Choose format HEX or DEC" .. ac.reset)
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end
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until format == "h" or format == "d"
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while true do
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io.write("Enter 10-character UID: "..ac.green)
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local uid = io.read():upper()
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if format == "h" and uid:match("^[A-F0-9]+$") and #uid == 10 then
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print(ac.reset.."Entered UID: " ..ac.green.. uid .. ac.reset)
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return uid
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elseif format == "d" and uid:match("^%d%d%d%d%d%d%d%d%d%d$") then
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return string.format("%010X", tonumber(uid))
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else
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print(ac.yellow .. "Invalid UID format. Please enter exactly 10 characters in selected format." .. ac.reset)
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end
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end
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elseif choice == "2" then
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io.write("Place original FOB on coil for reading and press" ..ac.cyan.." Enter..." .. ac.reset)
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io.read()
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while true do
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reset_log_file()
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command('lf em 410x read')
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local log_content = read_log_file(logfile)
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local uid = extract_uid(log_content)
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if uid and #uid == 10 then
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return uid
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else
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io.write(ac.yellow .. "Error reading UID. Please adjust FOB position and press Enter..." .. ac.reset)
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io.read()
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end
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end
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end
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end
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end
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local function main(args)
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for o, a in getopt.getopt(args, 'h') do
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if o == 'h' then return help() end
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end
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local blocks = {}
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local uid_count = 0
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for i = 1, 3 do
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local uid = get_uid_from_user()
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local encoded_hex = encode_uid(uid)
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blocks[#blocks + 1] = encoded_hex:sub(1, 8)
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blocks[#blocks + 1] = encoded_hex:sub(9, 16)
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uid_count = uid_count + 1
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if i < 3 then
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local next_choice
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repeat
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io.write(ac.reset.."Do you want to add another UID? "..ac.cyan.."(y/n) "..ac.reset)
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next_choice = io.read():lower()
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if next_choice ~= "y" and next_choice ~= "n" then
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print(ac.yellow .. "Invalid choice. Please enter (y) for yes or (n) for no." .. ac.reset)
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end
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until next_choice == "y" or next_choice == "n"
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if next_choice == "y" then
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print(dash)
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print(ac.yellow .. (i == 1 and "::: Second UID :::" or "::: Third UID :::") .. ac.reset)
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elseif next_choice == "n" then
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break
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end
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end
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end
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local block0_value = (uid_count == 1) and "00148040" or (uid_count == 2) and "00148080" or "001480C0"
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io.write("Place "..ac.cyan.."T5577"..ac.reset.." tag on coil for writing and press"..ac.cyan.." Enter..."..ac.reset)
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io.read()
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command('lf t55xx write -b 0 -d ' .. block0_value)
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for i = 1, #blocks do
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command('lf t55xx write -b ' .. i .. ' -d ' .. blocks[i])
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end
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print(dash)
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print(ac.green .. "Successfully written " .. uid_count .. " EM4102 UID(s) to T5577" .. ac.reset)
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end
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main(args)
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