More documentation added for the tools

tools/Readme.md

@@ -1,2 +1,4 @@
-# Source:
+# luatool.py
+**Not** supported with python 3.x
+## Source:
 https://github.com/4refr0nt/luatool/tree/master/luatool

tools/initialFlash.sh

@@ -5,6 +5,13 @@ LUATOOL=./tools/luatool.py
 DEVICE=$1
 BAUD=115200
 
+# check environment
+if [ ! -f $LUATOOL ]; then
+ echo "$LUATOOL not found"
+ echo "is the command prompt at the same level as the tools folder ?"
+ exit 1
+fi
+
 # check the serial connection
 
 if [ ! -c $DEVICE ]; then
@@ -12,7 +19,6 @@ if [ ! -c $DEVICE ]; then
  exit 1
 fi
 
-
 if [ $# -eq 0 ]; then
     echo ""
     echo "e.g. usage $0 <device> [<files to upoad>]"