diff --git a/WIFI_sniffer/cret_project/tst_dir/tata b/WIFI_sniffer/cret_project/tst_dir/tata
new file mode 100644
index 0000000..59219b6
--- /dev/null
+++ b/WIFI_sniffer/cret_project/tst_dir/tata
@@ -0,0 +1 @@
+il était une fois trois petits cochons roses...
diff --git a/WIFI_sniffer/cret_project/tst_dir/titi b/WIFI_sniffer/cret_project/tst_dir/titi
new file mode 100644
index 0000000..fcb9735
--- /dev/null
+++ b/WIFI_sniffer/cret_project/tst_dir/titi
@@ -0,0 +1 @@
+il était une ofis trois petits cochons roses...
diff --git a/WIFI_sniffer/cret_project/tst_dir/toto b/WIFI_sniffer/cret_project/tst_dir/toto
new file mode 100644
index 0000000..59219b6
--- /dev/null
+++ b/WIFI_sniffer/cret_project/tst_dir/toto
@@ -0,0 +1 @@
+il était une fois trois petits cochons roses...
diff --git a/WIFI_sniffer/cret_project/tst_dir/tst_dir1.lua b/WIFI_sniffer/cret_project/tst_dir/tst_dir1.lua
index 353e513..03fdbb5 100755
--- a/WIFI_sniffer/cret_project/tst_dir/tst_dir1.lua
+++ b/WIFI_sniffer/cret_project/tst_dir/tst_dir1.lua
@@ -1,22 +1,26 @@
 #!/usr/local/bin/lua5.1
 -- fonction dir() pour afficher les fichiers dans le dossier sur le host, donc PAS sur le NodeMCU !
--- afin d'utiliser la MEME version de Lua que sur NodeMCU (5.1) il faut installer le module 'lfs' avec:
--- luarocks --lua-dir=/usr/local/opt/lua@5.1 install lfs
--- source: https://github.com/keplerproject/luafilesystem
+-- source: https://stackoverflow.com/questions/5303174/how-to-get-list-of-directories-in-lua (30%)
 
-print("\n tst_dir1.lua   zf191110.1524   \n")
+print("\n tst_dir1.lua   zf191110.1959   \n")
+
+function calc_chksum_file(name_file)
+    size_file = 1   chksum_file = 0   local f = io.open(name_file, "r")
+    while true do
+        local t = f:read(1)   if t == nil then break end
+        chksum_file = chksum_file + size_file * string.byte(t)
+        size_file = size_file + 1
+    end
+    f:close()
+end
 
--- Lua implementation of PHP scandir function
 function scandir(directory)
-    local i, t, popen = 0, {}, io.popen
-    local pfile = popen('ls -a "'..directory..'"')
-    for filename in pfile:lines() do
-        i = i + 1
-        print("filename: "..filename)
-        t[i] = filename
+    local pfile = io.popen("ls -1 "..directory)
+    for name_file in pfile:lines() do
+        calc_chksum_file(name_file)
+        print(name_file..string.rep(" ",24-string.len(name_file)).." : "..size_file..", "..chksum_file)
     end
     pfile:close()
-    return t
 end
 
 scandir("./")
diff --git a/WIFI_sniffer/cret_project/tst_dir/tutu b/WIFI_sniffer/cret_project/tst_dir/tutu
new file mode 100644
index 0000000..59219b6
--- /dev/null
+++ b/WIFI_sniffer/cret_project/tst_dir/tutu
@@ -0,0 +1 @@
+il était une fois trois petits cochons roses...