diff --git a/README.md b/README.md
index 1d8a92d..0575155 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,10 @@
 # lua-simulation-libraries
+
 Lua libraries to be used in CarSimulator simulation scripts.
+
+## Supported functions
+
+### hex.lua
+
+- hexToAscii (convert string from hex to ASCII)
+- asciiToHex (convert string from ASCII to hex)
diff --git a/hex.lua b/hex.lua
new file mode 100644
index 0000000..43325a0
--- /dev/null
+++ b/hex.lua
@@ -0,0 +1,14 @@
+--[[
+    Convert the given number to hexadecimal notation
+]]
+function numberToHex(num)
+	return string.format('%x', num)
+end
+
+--[[
+    Convert the given ASCII string to hexadecimal notation
+]]
+function asciiToHex(str)
+	return (str:gsub(".", function(char) return string.format("%2x", char:byte()) end))
+end
+
diff --git a/lualib.lua b/lualib.lua
deleted file mode 100644
index 161c176..0000000
--- a/lualib.lua
+++ /dev/null
@@ -1,4 +0,0 @@
-
-function toHex(intValue, numBytes)
-  return string.format('%0' .. numBytes*2 .. 'X', intValue)
-end