diff --git a/resource/tools/check_file_encoding.sh b/resource/tools/check_file_encoding.sh
index cf82cee..83daa40 100755
--- a/resource/tools/check_file_encoding.sh
+++ b/resource/tools/check_file_encoding.sh
@@ -1,6 +1,12 @@
 #!/bin/bash
 
-find . \( -not -path "./firmware/nrf52_sdk/*" -and -not -path "./firmware/objects/*" -and -not -path "./software/script/venv/*"  -and -not -path "./software/bin/*"  -and -not -path "./software/src/tmp/*" \) -and \( -name "*.[ch]" -or -name "*.py" -or -name "Makefile" -or -name "*.txt" -or -name "*.md" -or -name "*.sh" \) -exec sh -c "cat {} |recode utf8.. >/dev/null || echo {}" \;
+if ! command -v recode >/dev/null; then
+    echo "Please install 'recode' package first" ;
+    exit 1
+fi
+echo "Files with suspicious chars:"
+find . \( -not -path "./.git/*" -and -not -path "./firmware/nrf52_sdk/*" -and -not -path "./firmware/objects/*" -and -not -path "./software/script/venv/*"  -and -not -path "./software/bin/*"  -and -not -path "./software/src/tmp/*" \) -and \( -name "*.[ch]" -or -name "*.py" -or -name "Makefile" -or -name "*.txt" -or -name "*.md" -or -name "*.sh" \) -exec sh -c "cat {} |recode utf8.. >/dev/null || echo {}" \;
+
 
 # Chinese encoding: GB18030 extending EUC-CN
 # recode GB18030..UTF-8 file.c
diff --git a/resource/tools/make_style.sh b/resource/tools/make_style.sh
new file mode 100755
index 0000000..f087b45
--- /dev/null
+++ b/resource/tools/make_style.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+
+# Make sure astyle is installed
+if ! command -v astyle >/dev/null; then
+    echo "Please install 'astyle' package first" ;
+    exit 1
+fi
+# Remove spaces & tabs at EOL, add LF at EOF if needed on *.c, *.h, *.py, Makefile, *.txt
+find . \( -not -path "./.git/*" -and -not -path "./firmware/nrf52_sdk/*" -and -not -path "*/venv/*" -and -not -path "*/tmp/*" -and \( -name "*.[ch]" -or -name "*.py" -or -name "Makefile" -or -name "*.txt" \) \) \
+    -exec perl -pi -e 's/[ \t]+$$//' {} \; \
+    -exec sh -c "tail -c1 {} | xxd -p | tail -1 | grep -q -v 0a\$" \; \
+    -exec sh -c "echo >> {}" \;
+# Apply astyle on *.c, *.h
+find . \( -not -path "./.git/*" -and -not -path "./firmware/nrf52_sdk/*" -and -not -path "*/venv/*" -and -not -path "*/tmp/*" -and -name "*.[ch]" \) -exec astyle --formatted --mode=c --suffix=none \
+    --indent=spaces=4 --indent-switches \
+    --keep-one-line-blocks --max-instatement-indent=60 \
+    --style=google --pad-oper --unpad-paren --pad-header \
+    --align-pointer=name {} \;
+
+# Detecting tabs.
+if [[ "$(uname)" == "Darwin" ]]; then
+    TABSCMD="egrep -l  '\t' {}"
+else
+    TABSCMD="grep -lP '\t' {}"
+fi
+${REWRITE_TABS:=false}
+if $REWRITE_TABS; then
+    TABSCMD="$TABSCMD && vi {} -c ':set tabstop=4' -c ':set et|retab' -c ':wq'"
+    echo "Files with tabs: (EDIT enabled, files will be rewritten!)"
+else
+    echo "Files with tabs: (rerun with \"REWRITE_TABS=true $0\" if you want to convert them with vim)"
+fi
+
+# to remove tabs within lines, one can try with: vi $file -c ':set tabstop=4' -c ':set et|retab' -c ':wq'
+find . \( -not -path "./.git/*" -and -not -path "./firmware/nrf52_sdk/*" -and -not -path "*/venv/*" -and -not -path "*/tmp/*" -and \( -name "*.[ch]" -or -name "*.py" -or -name "*.md" -or -name "*.txt" \) \) \
+      -exec sh -c "$TABSCMD" \;