Some refactoring, also placed wait14443a here

client/lualibs/read14a.lua

@@ -87,12 +87,11 @@ local function sendToDevice(command, ignoreresponse)
 	return response,nil
 end
 
-
-local library = {
-	-- This function does a connect. 
+-- This function does a connect and retrieves som einfo
 -- @param dont_disconnect - if true, does not disable the field
-	read1443a = function(dont_disconnect)
-
+-- @return if successfull: an table containing card info
+-- @return if unsuccessfull : nil, error
+local function read14443a(dont_disconnect)
 	local command, result, info, err, data
 
 	command = Command:new{cmd = cmds.CMD_READER_ISO_14443a, 
@@ -117,7 +116,25 @@ local library = {
 		return nil, err
 	end
 	return info
-	end,
+end
+
+---
+-- Waits for a mifare card to be placed within the vicinity of the reader. 
+-- @return if successfull: an table containing card info
+-- @return if unsuccessfull : nil, error
+local function waitFor14443a()
+	print("Waiting for card... press any key to quit")
+	while not core.ukbhit() do
+		res, err = read14443a()
+		if res then return res end
+		-- err means that there was no response from card
+	end
+	return nil, "Aborted by user"
+end
+local library = {
+	
+	read1443a = read14443a,
+	waitFor14443a = waitFor14443a,
 	parse1443a = parse1443a,
 	sendToDevice = sendToDevice,
 	ISO14A_COMMAND = ISO14A_COMMAND,